{"api_version":"1","generated_at":"2026-07-23T14:36:06+00:00","cve":"CVE-2026-64188","urls":{"html":"https://cve.report/CVE-2026-64188","api":"https://cve.report/api/cve/CVE-2026-64188.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64188","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64188"},"summary":{"title":"net: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()\n\nrmnet_dellink() removes the endpoint from the hash table with\nhlist_del_init_rcu() and then immediately frees it with kfree(). However,\nRCU readers on the receive path (rmnet_rx_handler ->\n__rmnet_map_ingress_handler) may still hold a reference to the endpoint and\ndereference ep->egress_dev after the memory has been freed. The endpoint is\na kmalloc-32 object, and the stale read at offset 8 corresponds to the\negress_dev pointer.\n\n  BUG: unable to handle page fault for address: ffffffffde942eef\n  Oops: 0002 [#1] SMP NOPTI\n  CPU: 1 UID: 0 PID: 137 Comm: poc_write Not tainted 7.0.0+ #4 PREEMPTLAZY\n  RIP: 0010:rmnet_vnd_rx_fixup (rmnet_vnd.c:27)\n  Call Trace:\n   <TASK>\n   __rmnet_map_ingress_handler (rmnet_handlers.c:48 rmnet_handlers.c:101)\n   rmnet_rx_handler (rmnet_handlers.c:129 rmnet_handlers.c:235)\n   __netif_receive_skb_core.constprop.0 (net/core/dev.c:6096)\n   __netif_receive_skb_one_core (net/core/dev.c:6208)\n   netif_receive_skb (net/core/dev.c:6467)\n   tun_get_user (drivers/net/tun.c:1955)\n   tun_chr_write_iter (drivers/net/tun.c:2003)\n   vfs_write (fs/read_write.c:688)\n   ksys_write (fs/read_write.c:740)\n   </TASK>\n\nAdd an rcu_head field to struct rmnet_endpoint and replace kfree() with\nkfree_rcu() so the endpoint memory remains valid through the RCU grace\nperiod. Also remove the rmnet_vnd_dellink() call and inline only the\nnr_rmnet_devs decrement, since rmnet_vnd_dellink() would set\nep->egress_dev to NULL during the grace period, creating a data race\nwith lockless readers.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-20 17:18:21","updated_at":"2026-07-20 17:18:21"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9918698cf3aee4032e12bb42fd5a951dc465339b","name":"https://git.kernel.org/stable/c/9918698cf3aee4032e12bb42fd5a951dc465339b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c4e676c3505c5058922dc1a6f1ded795f6758135","name":"https://git.kernel.org/stable/c/c4e676c3505c5058922dc1a6f1ded795f6758135","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/41e06fcc5df0774d212e70c5b503fc769492bce3","name":"https://git.kernel.org/stable/c/41e06fcc5df0774d212e70c5b503fc769492bce3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f193e38cb257d033060b63f1cfd94af076b3a2ab","name":"https://git.kernel.org/stable/c/f193e38cb257d033060b63f1cfd94af076b3a2ab","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8b17adf6d4fb6bf61fa4c3f58366a7c082799a71","name":"https://git.kernel.org/stable/c/8b17adf6d4fb6bf61fa4c3f58366a7c082799a71","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/310b93246bfec7d4452507e0c15477377ed9f025","name":"https://git.kernel.org/stable/c/310b93246bfec7d4452507e0c15477377ed9f025","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d00c953a8f69921f484b629801766da68f27f658","name":"https://git.kernel.org/stable/c/d00c953a8f69921f484b629801766da68f27f658","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1078ae8175777e80c9637996fb4a46c55f0ce576","name":"https://git.kernel.org/stable/c/1078ae8175777e80c9637996fb4a46c55f0ce576","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64188","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64188","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ceed73a2cf4aff2921802aa3d21d45280677547d c4e676c3505c5058922dc1a6f1ded795f6758135 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ceed73a2cf4aff2921802aa3d21d45280677547d 9918698cf3aee4032e12bb42fd5a951dc465339b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ceed73a2cf4aff2921802aa3d21d45280677547d 310b93246bfec7d4452507e0c15477377ed9f025 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ceed73a2cf4aff2921802aa3d21d45280677547d 1078ae8175777e80c9637996fb4a46c55f0ce576 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ceed73a2cf4aff2921802aa3d21d45280677547d 41e06fcc5df0774d212e70c5b503fc769492bce3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ceed73a2cf4aff2921802aa3d21d45280677547d 8b17adf6d4fb6bf61fa4c3f58366a7c082799a71 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ceed73a2cf4aff2921802aa3d21d45280677547d f193e38cb257d033060b63f1cfd94af076b3a2ab git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ceed73a2cf4aff2921802aa3d21d45280677547d d00c953a8f69921f484b629801766da68f27f658 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.14","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.260 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.211 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.177 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.144 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.95 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.37 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.14 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c","drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c4e676c3505c5058922dc1a6f1ded795f6758135","status":"affected","version":"ceed73a2cf4aff2921802aa3d21d45280677547d","versionType":"git"},{"lessThan":"9918698cf3aee4032e12bb42fd5a951dc465339b","status":"affected","version":"ceed73a2cf4aff2921802aa3d21d45280677547d","versionType":"git"},{"lessThan":"310b93246bfec7d4452507e0c15477377ed9f025","status":"affected","version":"ceed73a2cf4aff2921802aa3d21d45280677547d","versionType":"git"},{"lessThan":"1078ae8175777e80c9637996fb4a46c55f0ce576","status":"affected","version":"ceed73a2cf4aff2921802aa3d21d45280677547d","versionType":"git"},{"lessThan":"41e06fcc5df0774d212e70c5b503fc769492bce3","status":"affected","version":"ceed73a2cf4aff2921802aa3d21d45280677547d","versionType":"git"},{"lessThan":"8b17adf6d4fb6bf61fa4c3f58366a7c082799a71","status":"affected","version":"ceed73a2cf4aff2921802aa3d21d45280677547d","versionType":"git"},{"lessThan":"f193e38cb257d033060b63f1cfd94af076b3a2ab","status":"affected","version":"ceed73a2cf4aff2921802aa3d21d45280677547d","versionType":"git"},{"lessThan":"d00c953a8f69921f484b629801766da68f27f658","status":"affected","version":"ceed73a2cf4aff2921802aa3d21d45280677547d","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c","drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.14"},{"lessThan":"4.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.260","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.211","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.177","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.144","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.95","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.37","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.14","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.260","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.211","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.177","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.144","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.95","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.37","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.14","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"4.14","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()\n\nrmnet_dellink() removes the endpoint from the hash table with\nhlist_del_init_rcu() and then immediately frees it with kfree(). However,\nRCU readers on the receive path (rmnet_rx_handler ->\n__rmnet_map_ingress_handler) may still hold a reference to the endpoint and\ndereference ep->egress_dev after the memory has been freed. The endpoint is\na kmalloc-32 object, and the stale read at offset 8 corresponds to the\negress_dev pointer.\n\n  BUG: unable to handle page fault for address: ffffffffde942eef\n  Oops: 0002 [#1] SMP NOPTI\n  CPU: 1 UID: 0 PID: 137 Comm: poc_write Not tainted 7.0.0+ #4 PREEMPTLAZY\n  RIP: 0010:rmnet_vnd_rx_fixup (rmnet_vnd.c:27)\n  Call Trace:\n   <TASK>\n   __rmnet_map_ingress_handler (rmnet_handlers.c:48 rmnet_handlers.c:101)\n   rmnet_rx_handler (rmnet_handlers.c:129 rmnet_handlers.c:235)\n   __netif_receive_skb_core.constprop.0 (net/core/dev.c:6096)\n   __netif_receive_skb_one_core (net/core/dev.c:6208)\n   netif_receive_skb (net/core/dev.c:6467)\n   tun_get_user (drivers/net/tun.c:1955)\n   tun_chr_write_iter (drivers/net/tun.c:2003)\n   vfs_write (fs/read_write.c:688)\n   ksys_write (fs/read_write.c:740)\n   </TASK>\n\nAdd an rcu_head field to struct rmnet_endpoint and replace kfree() with\nkfree_rcu() so the endpoint memory remains valid through the RCU grace\nperiod. Also remove the rmnet_vnd_dellink() call and inline only the\nnr_rmnet_devs decrement, since rmnet_vnd_dellink() would set\nep->egress_dev to NULL during the grace period, creating a data race\nwith lockless readers."}],"providerMetadata":{"dateUpdated":"2026-07-20T16:27:47.216Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c4e676c3505c5058922dc1a6f1ded795f6758135"},{"url":"https://git.kernel.org/stable/c/9918698cf3aee4032e12bb42fd5a951dc465339b"},{"url":"https://git.kernel.org/stable/c/310b93246bfec7d4452507e0c15477377ed9f025"},{"url":"https://git.kernel.org/stable/c/1078ae8175777e80c9637996fb4a46c55f0ce576"},{"url":"https://git.kernel.org/stable/c/41e06fcc5df0774d212e70c5b503fc769492bce3"},{"url":"https://git.kernel.org/stable/c/8b17adf6d4fb6bf61fa4c3f58366a7c082799a71"},{"url":"https://git.kernel.org/stable/c/f193e38cb257d033060b63f1cfd94af076b3a2ab"},{"url":"https://git.kernel.org/stable/c/d00c953a8f69921f484b629801766da68f27f658"}],"title":"net: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64188","datePublished":"2026-07-20T16:27:47.216Z","dateReserved":"2026-07-19T07:54:57.040Z","dateUpdated":"2026-07-20T16:27:47.216Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-20 17:18:21","lastModifiedDate":"2026-07-20 17:18:21","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64188","Ordinal":"1","Title":"net: qualcomm: rmnet: fix endpoint use-after-free in rmnet_delli","CVE":"CVE-2026-64188","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64188","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()\n\nrmnet_dellink() removes the endpoint from the hash table with\nhlist_del_init_rcu() and then immediately frees it with kfree(). However,\nRCU readers on the receive path (rmnet_rx_handler ->\n__rmnet_map_ingress_handler) may still hold a reference to the endpoint and\ndereference ep->egress_dev after the memory has been freed. The endpoint is\na kmalloc-32 object, and the stale read at offset 8 corresponds to the\negress_dev pointer.\n\n  BUG: unable to handle page fault for address: ffffffffde942eef\n  Oops: 0002 [#1] SMP NOPTI\n  CPU: 1 UID: 0 PID: 137 Comm: poc_write Not tainted 7.0.0+ #4 PREEMPTLAZY\n  RIP: 0010:rmnet_vnd_rx_fixup (rmnet_vnd.c:27)\n  Call Trace:\n   <TASK>\n   __rmnet_map_ingress_handler (rmnet_handlers.c:48 rmnet_handlers.c:101)\n   rmnet_rx_handler (rmnet_handlers.c:129 rmnet_handlers.c:235)\n   __netif_receive_skb_core.constprop.0 (net/core/dev.c:6096)\n   __netif_receive_skb_one_core (net/core/dev.c:6208)\n   netif_receive_skb (net/core/dev.c:6467)\n   tun_get_user (drivers/net/tun.c:1955)\n   tun_chr_write_iter (drivers/net/tun.c:2003)\n   vfs_write (fs/read_write.c:688)\n   ksys_write (fs/read_write.c:740)\n   </TASK>\n\nAdd an rcu_head field to struct rmnet_endpoint and replace kfree() with\nkfree_rcu() so the endpoint memory remains valid through the RCU grace\nperiod. Also remove the rmnet_vnd_dellink() call and inline only the\nnr_rmnet_devs decrement, since rmnet_vnd_dellink() would set\nep->egress_dev to NULL during the grace period, creating a data race\nwith lockless readers.","Type":"Description","Title":"net: qualcomm: rmnet: fix endpoint use-after-free in rmnet_delli"}]}}}