{"api_version":"1","generated_at":"2026-07-24T18:35:34+00:00","cve":"CVE-2025-40070","urls":{"html":"https://cve.report/CVE-2025-40070","api":"https://cve.report/api/cve/CVE-2025-40070.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-40070","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-40070"},"summary":{"title":"pps: fix warning in pps_register_cdev when register device fail","description":"In the Linux kernel, the following vulnerability has been resolved:\n\npps: fix warning in pps_register_cdev when register device fail\n\nSimilar to previous commit 2a934fdb01db (\"media: v4l2-dev: fix error\nhandling in __video_register_device()\"), the release hook should be set\nbefore device_register(). Otherwise, when device_register() return error\nand put_device() try to callback the release function, the below warning\nmay happen.\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 1 PID: 4760 at drivers/base/core.c:2567 device_release+0x1bd/0x240 drivers/base/core.c:2567\n  Modules linked in:\n  CPU: 1 UID: 0 PID: 4760 Comm: syz.4.914 Not tainted 6.17.0-rc3+ #1 NONE\n  RIP: 0010:device_release+0x1bd/0x240 drivers/base/core.c:2567\n  Call Trace:\n   <TASK>\n   kobject_cleanup+0x136/0x410 lib/kobject.c:689\n   kobject_release lib/kobject.c:720 [inline]\n   kref_put include/linux/kref.h:65 [inline]\n   kobject_put+0xe9/0x130 lib/kobject.c:737\n   put_device+0x24/0x30 drivers/base/core.c:3797\n   pps_register_cdev+0x2da/0x370 drivers/pps/pps.c:402\n   pps_register_source+0x2f6/0x480 drivers/pps/kapi.c:108\n   pps_tty_open+0x190/0x310 drivers/pps/clients/pps-ldisc.c:57\n   tty_ldisc_open+0xa7/0x120 drivers/tty/tty_ldisc.c:432\n   tty_set_ldisc+0x333/0x780 drivers/tty/tty_ldisc.c:563\n   tiocsetd drivers/tty/tty_io.c:2429 [inline]\n   tty_ioctl+0x5d1/0x1700 drivers/tty/tty_io.c:2728\n   vfs_ioctl fs/ioctl.c:51 [inline]\n   __do_sys_ioctl fs/ioctl.c:598 [inline]\n   __se_sys_ioctl fs/ioctl.c:584 [inline]\n   __x64_sys_ioctl+0x194/0x210 fs/ioctl.c:584\n   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n   do_syscall_64+0x5f/0x2a0 arch/x86/entry/syscall_64.c:94\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n   </TASK>\n\nBefore commit c79a39dc8d06 (\"pps: Fix a use-after-free\"),\npps_register_cdev() call device_create() to create pps->dev, which will\ninit dev->release to device_create_release(). Now the comment is outdated,\njust remove it.\n\nThanks for the reminder from Calvin Owens, 'kfree_pps' should be removed\nin pps_register_source() to avoid a double free in the failure case.","state":"PUBLISHED","assigner":"Linux","published_at":"2025-10-28 12:15:41","updated_at":"2026-07-14 13:17:52"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/cf71834a0cfc394c72d62fd6dbb470ee13cf8f5e","name":"https://git.kernel.org/stable/c/cf71834a0cfc394c72d62fd6dbb470ee13cf8f5e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/125527db41805693208ee1aacd7f3ffe6a3a489c","name":"https://git.kernel.org/stable/c/125527db41805693208ee1aacd7f3ffe6a3a489c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4cbd7450a22c5ee4842fc4175ad06c0c82ea53a8","name":"https://git.kernel.org/stable/c/4cbd7450a22c5ee4842fc4175ad06c0c82ea53a8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2a194707ca27a3b0523023fa8b446e5ec922dc51","name":"https://git.kernel.org/stable/c/2a194707ca27a3b0523023fa8b446e5ec922dc51","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","name":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","refsource":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b0531cdba5029f897da5156815e3bdafe1e9b88d","name":"https://git.kernel.org/stable/c/b0531cdba5029f897da5156815e3bdafe1e9b88d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0f97564a1fb62f34b3b498e2f12caffbe99c004a","name":"https://git.kernel.org/stable/c/0f97564a1fb62f34b3b498e2f12caffbe99c004a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f01fa3588e0b3cb1540f56d2c6bd99e5b3810234","name":"https://git.kernel.org/stable/c/f01fa3588e0b3cb1540f56d2c6bd99e5b3810234","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/38c7bb10aae5118dd48fa7a82f7bf93839bcc320","name":"https://git.kernel.org/stable/c/38c7bb10aae5118dd48fa7a82f7bf93839bcc320","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-40070","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40070","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 785c78ed0d39d1717cca3ef931d3e51337b5e90e 38c7bb10aae5118dd48fa7a82f7bf93839bcc320 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1a7735ab2cb9747518a7416fb5929e85442dec62 2a194707ca27a3b0523023fa8b446e5ec922dc51 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c4041b6b0a7a3def8cf3f3d6120ff337bc4c40f7 125527db41805693208ee1aacd7f3ffe6a3a489c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 91932db1d96b2952299ce30c1c693d834d10ace6 4cbd7450a22c5ee4842fc4175ad06c0c82ea53a8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cd3bbcb6b3a7caa5ce67de76723b6d8531fb7f64 cf71834a0cfc394c72d62fd6dbb470ee13cf8f5e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7e5ee3281dc09014367f5112b6d566ba36ea2d49 f01fa3588e0b3cb1540f56d2c6bd99e5b3810234 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c79a39dc8d060b9e64e8b0fa9d245d44befeefbe 0f97564a1fb62f34b3b498e2f12caffbe99c004a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c79a39dc8d060b9e64e8b0fa9d245d44befeefbe b0531cdba5029f897da5156815e3bdafe1e9b88d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 85241f7de216f8298f6e48540ea13d7dcd100870 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.4.291 5.4.301 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.10.235 5.10.246 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15.179 5.15.195 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.129 6.1.156 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.76 6.6.112 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.13 6.12.53 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.13.2 6.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.14","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.4.301 5.4.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.246 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.195 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.156 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.112 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.53 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.17.3 6.17.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 * original_commit_for_fix","platforms":[]},{"source":"ADP","vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","version":"affected V3.1.6 * custom","platforms":[]},{"source":"ADP","vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","version":"affected V3.1.6 * custom","platforms":[]},{"source":"ADP","vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","version":"affected V3.1.6 * custom","platforms":[]},{"source":"ADP","vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","version":"affected V3.1.6 * custom","platforms":[]},{"source":"ADP","vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","version":"affected V3.1.6 * custom","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2025","cve_id":"40070","cve":"CVE-2025-40070","epss":"0.001930000","percentile":"0.091100000","score_date":"2026-07-14","updated_at":"2026-07-15 00:14:55"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"affected":[{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]}],"providerMetadata":{"dateUpdated":"2026-07-14T12:43:16.884Z","orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","shortName":"siemens-SADP"},"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}],"x_adpType":"supplier"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/pps/kapi.c","drivers/pps/pps.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"38c7bb10aae5118dd48fa7a82f7bf93839bcc320","status":"affected","version":"785c78ed0d39d1717cca3ef931d3e51337b5e90e","versionType":"git"},{"lessThan":"2a194707ca27a3b0523023fa8b446e5ec922dc51","status":"affected","version":"1a7735ab2cb9747518a7416fb5929e85442dec62","versionType":"git"},{"lessThan":"125527db41805693208ee1aacd7f3ffe6a3a489c","status":"affected","version":"c4041b6b0a7a3def8cf3f3d6120ff337bc4c40f7","versionType":"git"},{"lessThan":"4cbd7450a22c5ee4842fc4175ad06c0c82ea53a8","status":"affected","version":"91932db1d96b2952299ce30c1c693d834d10ace6","versionType":"git"},{"lessThan":"cf71834a0cfc394c72d62fd6dbb470ee13cf8f5e","status":"affected","version":"cd3bbcb6b3a7caa5ce67de76723b6d8531fb7f64","versionType":"git"},{"lessThan":"f01fa3588e0b3cb1540f56d2c6bd99e5b3810234","status":"affected","version":"7e5ee3281dc09014367f5112b6d566ba36ea2d49","versionType":"git"},{"lessThan":"0f97564a1fb62f34b3b498e2f12caffbe99c004a","status":"affected","version":"c79a39dc8d060b9e64e8b0fa9d245d44befeefbe","versionType":"git"},{"lessThan":"b0531cdba5029f897da5156815e3bdafe1e9b88d","status":"affected","version":"c79a39dc8d060b9e64e8b0fa9d245d44befeefbe","versionType":"git"},{"status":"affected","version":"85241f7de216f8298f6e48540ea13d7dcd100870","versionType":"git"},{"lessThan":"5.4.301","status":"affected","version":"5.4.291","versionType":"semver"},{"lessThan":"5.10.246","status":"affected","version":"5.10.235","versionType":"semver"},{"lessThan":"5.15.195","status":"affected","version":"5.15.179","versionType":"semver"},{"lessThan":"6.1.156","status":"affected","version":"6.1.129","versionType":"semver"},{"lessThan":"6.6.112","status":"affected","version":"6.6.76","versionType":"semver"},{"lessThan":"6.12.53","status":"affected","version":"6.12.13","versionType":"semver"},{"lessThan":"6.14","status":"affected","version":"6.13.2","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/pps/kapi.c","drivers/pps/pps.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.14"},{"lessThan":"6.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.4.*","status":"unaffected","version":"5.4.301","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.246","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.195","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.156","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.112","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.53","versionType":"semver"},{"lessThanOrEqual":"6.17.*","status":"unaffected","version":"6.17.3","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.18","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.4.301","versionStartIncluding":"5.4.291","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.246","versionStartIncluding":"5.10.235","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.195","versionStartIncluding":"5.15.179","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.156","versionStartIncluding":"6.1.129","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.112","versionStartIncluding":"6.6.76","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.53","versionStartIncluding":"6.12.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.17.3","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\npps: fix warning in pps_register_cdev when register device fail\n\nSimilar to previous commit 2a934fdb01db (\"media: v4l2-dev: fix error\nhandling in __video_register_device()\"), the release hook should be set\nbefore device_register(). Otherwise, when device_register() return error\nand put_device() try to callback the release function, the below warning\nmay happen.\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 1 PID: 4760 at drivers/base/core.c:2567 device_release+0x1bd/0x240 drivers/base/core.c:2567\n  Modules linked in:\n  CPU: 1 UID: 0 PID: 4760 Comm: syz.4.914 Not tainted 6.17.0-rc3+ #1 NONE\n  RIP: 0010:device_release+0x1bd/0x240 drivers/base/core.c:2567\n  Call Trace:\n   <TASK>\n   kobject_cleanup+0x136/0x410 lib/kobject.c:689\n   kobject_release lib/kobject.c:720 [inline]\n   kref_put include/linux/kref.h:65 [inline]\n   kobject_put+0xe9/0x130 lib/kobject.c:737\n   put_device+0x24/0x30 drivers/base/core.c:3797\n   pps_register_cdev+0x2da/0x370 drivers/pps/pps.c:402\n   pps_register_source+0x2f6/0x480 drivers/pps/kapi.c:108\n   pps_tty_open+0x190/0x310 drivers/pps/clients/pps-ldisc.c:57\n   tty_ldisc_open+0xa7/0x120 drivers/tty/tty_ldisc.c:432\n   tty_set_ldisc+0x333/0x780 drivers/tty/tty_ldisc.c:563\n   tiocsetd drivers/tty/tty_io.c:2429 [inline]\n   tty_ioctl+0x5d1/0x1700 drivers/tty/tty_io.c:2728\n   vfs_ioctl fs/ioctl.c:51 [inline]\n   __do_sys_ioctl fs/ioctl.c:598 [inline]\n   __se_sys_ioctl fs/ioctl.c:584 [inline]\n   __x64_sys_ioctl+0x194/0x210 fs/ioctl.c:584\n   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n   do_syscall_64+0x5f/0x2a0 arch/x86/entry/syscall_64.c:94\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n   </TASK>\n\nBefore commit c79a39dc8d06 (\"pps: Fix a use-after-free\"),\npps_register_cdev() call device_create() to create pps->dev, which will\ninit dev->release to device_create_release(). Now the comment is outdated,\njust remove it.\n\nThanks for the reminder from Calvin Owens, 'kfree_pps' should be removed\nin pps_register_source() to avoid a double free in the failure case."}],"providerMetadata":{"dateUpdated":"2026-05-23T16:01:20.071Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/38c7bb10aae5118dd48fa7a82f7bf93839bcc320"},{"url":"https://git.kernel.org/stable/c/2a194707ca27a3b0523023fa8b446e5ec922dc51"},{"url":"https://git.kernel.org/stable/c/125527db41805693208ee1aacd7f3ffe6a3a489c"},{"url":"https://git.kernel.org/stable/c/4cbd7450a22c5ee4842fc4175ad06c0c82ea53a8"},{"url":"https://git.kernel.org/stable/c/cf71834a0cfc394c72d62fd6dbb470ee13cf8f5e"},{"url":"https://git.kernel.org/stable/c/f01fa3588e0b3cb1540f56d2c6bd99e5b3810234"},{"url":"https://git.kernel.org/stable/c/0f97564a1fb62f34b3b498e2f12caffbe99c004a"},{"url":"https://git.kernel.org/stable/c/b0531cdba5029f897da5156815e3bdafe1e9b88d"}],"title":"pps: fix warning in pps_register_cdev when register device fail","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2025-40070","datePublished":"2025-10-28T11:48:38.838Z","dateReserved":"2025-04-16T07:20:57.159Z","dateUpdated":"2026-07-14T12:43:16.884Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-10-28 12:15:41","lastModifiedDate":"2026-07-14 13:17:52","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"40070","Ordinal":"1","Title":"pps: fix warning in pps_register_cdev when register device fail","CVE":"CVE-2025-40070","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"40070","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\npps: fix warning in pps_register_cdev when register device fail\n\nSimilar to previous commit 2a934fdb01db (\"media: v4l2-dev: fix error\nhandling in __video_register_device()\"), the release hook should be set\nbefore device_register(). Otherwise, when device_register() return error\nand put_device() try to callback the release function, the below warning\nmay happen.\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 1 PID: 4760 at drivers/base/core.c:2567 device_release+0x1bd/0x240 drivers/base/core.c:2567\n  Modules linked in:\n  CPU: 1 UID: 0 PID: 4760 Comm: syz.4.914 Not tainted 6.17.0-rc3+ #1 NONE\n  RIP: 0010:device_release+0x1bd/0x240 drivers/base/core.c:2567\n  Call Trace:\n   <TASK>\n   kobject_cleanup+0x136/0x410 lib/kobject.c:689\n   kobject_release lib/kobject.c:720 [inline]\n   kref_put include/linux/kref.h:65 [inline]\n   kobject_put+0xe9/0x130 lib/kobject.c:737\n   put_device+0x24/0x30 drivers/base/core.c:3797\n   pps_register_cdev+0x2da/0x370 drivers/pps/pps.c:402\n   pps_register_source+0x2f6/0x480 drivers/pps/kapi.c:108\n   pps_tty_open+0x190/0x310 drivers/pps/clients/pps-ldisc.c:57\n   tty_ldisc_open+0xa7/0x120 drivers/tty/tty_ldisc.c:432\n   tty_set_ldisc+0x333/0x780 drivers/tty/tty_ldisc.c:563\n   tiocsetd drivers/tty/tty_io.c:2429 [inline]\n   tty_ioctl+0x5d1/0x1700 drivers/tty/tty_io.c:2728\n   vfs_ioctl fs/ioctl.c:51 [inline]\n   __do_sys_ioctl fs/ioctl.c:598 [inline]\n   __se_sys_ioctl fs/ioctl.c:584 [inline]\n   __x64_sys_ioctl+0x194/0x210 fs/ioctl.c:584\n   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n   do_syscall_64+0x5f/0x2a0 arch/x86/entry/syscall_64.c:94\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n   </TASK>\n\nBefore commit c79a39dc8d06 (\"pps: Fix a use-after-free\"),\npps_register_cdev() call device_create() to create pps->dev, which will\ninit dev->release to device_create_release(). Now the comment is outdated,\njust remove it.\n\nThanks for the reminder from Calvin Owens, 'kfree_pps' should be removed\nin pps_register_source() to avoid a double free in the failure case.","Type":"Description","Title":"pps: fix warning in pps_register_cdev when register device fail"}]}}}