{"api_version":"1","generated_at":"2026-07-23T11:16:52+00:00","cve":"CVE-2026-53385","urls":{"html":"https://cve.report/CVE-2026-53385","api":"https://cve.report/api/cve/CVE-2026-53385.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53385","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53385"},"summary":{"title":"vc_screen: fix null-ptr-deref in vcs_notifier() during concurrent vcs_write","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvc_screen: fix null-ptr-deref in vcs_notifier() during concurrent vcs_write\n\nA KASAN null-ptr-deref was observed in vcs_notifier():\n\nBUG: KASAN: null-ptr-deref in vcs_notifier+0x98/0x130\nRead of size 2 at addr qmp_cmd_name: qmp_capabilities, arguments: {}\n\nThe issue is a race condition in vcs_write(). When the console_lock is\ntemporarily dropped (to copy data from userspace), the vc_data pointer\nobtained from vcs_vc() may become stale. After re-acquiring the lock,\nvcs_vc() is called again to re-validate the pointer. If the vc has been\ndeallocated in the meantime, vcs_vc() returns NULL, and the while loop\nbreaks (with written > 0). However, after the loop, vcs_scr_updated(vc)\nis still called with the now-NULL vc pointer, leading to a null pointer\ndereference in the notifier chain (vcs_notifier dereferences param->vc).\n\nFix this by adding a NULL check for vc before calling vcs_scr_updated().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 12:16:49","updated_at":"2026-07-19 12:16:49"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/74be188eb2dc1c99d63986167b9a67d415fe7326","name":"https://git.kernel.org/stable/c/74be188eb2dc1c99d63986167b9a67d415fe7326","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7cc3dd79777f6ae4625ec37e84dd18a26dc88bde","name":"https://git.kernel.org/stable/c/7cc3dd79777f6ae4625ec37e84dd18a26dc88bde","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/43a6281790273c1b0a9ab76609ff0245b968f1e6","name":"https://git.kernel.org/stable/c/43a6281790273c1b0a9ab76609ff0245b968f1e6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/73049768ad57145acd337102c5aa3c788e6642c8","name":"https://git.kernel.org/stable/c/73049768ad57145acd337102c5aa3c788e6642c8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ff4806202749a51938236214adc0281481a57366","name":"https://git.kernel.org/stable/c/ff4806202749a51938236214adc0281481a57366","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a287620312dc6dcb9a093417a0e589bf30fcf38a","name":"https://git.kernel.org/stable/c/a287620312dc6dcb9a093417a0e589bf30fcf38a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b6bbb85cf45bf0b070e741997fe0af3a772c5ad5","name":"https://git.kernel.org/stable/c/b6bbb85cf45bf0b070e741997fe0af3a772c5ad5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8232fca738011ca2ec865b46ec721d1796dc0580","name":"https://git.kernel.org/stable/c/8232fca738011ca2ec865b46ec721d1796dc0580","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/09a43e81279b8da15526da09877134b8bcf618b0","name":"https://git.kernel.org/stable/c/09a43e81279b8da15526da09877134b8bcf618b0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53385","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53385","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 11dddfbb7a4e62489b01074d6c04d9d1b42e4047 43a6281790273c1b0a9ab76609ff0245b968f1e6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e3d1adcad5b73c7ed0c7edb35ab68abcaa45cf67 b6bbb85cf45bf0b070e741997fe0af3a772c5ad5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3338d0b9acde770ee588eead5cac32c25e7048fc ff4806202749a51938236214adc0281481a57366 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357 8232fca738011ca2ec865b46ec721d1796dc0580 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0deff678157333d775af190f84696336cdcccd6d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a4e3c4c65ae8510e01352c9a4347e05c035b2ce2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1de42e7653d6714a7507ba6696151a1fa028c69f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.10.181 5.10.260 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15.113 5.15.211 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.30 6.1.177 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.14.327 4.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.19.284 4.20 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.4.244 5.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.3.4 6.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.4","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.4 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 7.1.2 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"53385","cve":"CVE-2026-53385","epss":"0.001950000","percentile":"0.094660000","score_date":"2026-07-20","updated_at":"2026-07-21 00:13:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/tty/vt/vc_screen.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"43a6281790273c1b0a9ab76609ff0245b968f1e6","status":"affected","version":"11dddfbb7a4e62489b01074d6c04d9d1b42e4047","versionType":"git"},{"lessThan":"b6bbb85cf45bf0b070e741997fe0af3a772c5ad5","status":"affected","version":"e3d1adcad5b73c7ed0c7edb35ab68abcaa45cf67","versionType":"git"},{"lessThan":"ff4806202749a51938236214adc0281481a57366","status":"affected","version":"3338d0b9acde770ee588eead5cac32c25e7048fc","versionType":"git"},{"lessThan":"8232fca738011ca2ec865b46ec721d1796dc0580","status":"affected","version":"8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357","versionType":"git"},{"lessThan":"73049768ad57145acd337102c5aa3c788e6642c8","status":"affected","version":"8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357","versionType":"git"},{"lessThan":"7cc3dd79777f6ae4625ec37e84dd18a26dc88bde","status":"affected","version":"8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357","versionType":"git"},{"lessThan":"74be188eb2dc1c99d63986167b9a67d415fe7326","status":"affected","version":"8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357","versionType":"git"},{"lessThan":"09a43e81279b8da15526da09877134b8bcf618b0","status":"affected","version":"8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357","versionType":"git"},{"lessThan":"a287620312dc6dcb9a093417a0e589bf30fcf38a","status":"affected","version":"8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357","versionType":"git"},{"status":"affected","version":"934de9a9b659785fed3e820bc0c813a460c71fea","versionType":"git"},{"status":"affected","version":"0deff678157333d775af190f84696336cdcccd6d","versionType":"git"},{"status":"affected","version":"a4e3c4c65ae8510e01352c9a4347e05c035b2ce2","versionType":"git"},{"status":"affected","version":"1de42e7653d6714a7507ba6696151a1fa028c69f","versionType":"git"},{"lessThan":"5.10.260","status":"affected","version":"5.10.181","versionType":"semver"},{"lessThan":"5.15.211","status":"affected","version":"5.15.113","versionType":"semver"},{"lessThan":"6.1.177","status":"affected","version":"6.1.30","versionType":"semver"},{"lessThan":"4.15","status":"affected","version":"4.14.327","versionType":"semver"},{"lessThan":"4.20","status":"affected","version":"4.19.284","versionType":"semver"},{"lessThan":"5.5","status":"affected","version":"5.4.244","versionType":"semver"},{"lessThan":"6.4","status":"affected","version":"6.3.4","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/tty/vt/vc_screen.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.4"},{"lessThan":"6.4","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":"7.1.*","status":"unaffected","version":"7.1.2","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.260","versionStartIncluding":"5.10.181","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.211","versionStartIncluding":"5.15.113","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.177","versionStartIncluding":"6.1.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.144","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.95","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.37","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.14","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.2","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*: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the Linux kernel, the following vulnerability has been resolved:\n\nvc_screen: fix null-ptr-deref in vcs_notifier() during concurrent vcs_write\n\nA KASAN null-ptr-deref was observed in vcs_notifier():\n\nBUG: KASAN: null-ptr-deref in vcs_notifier+0x98/0x130\nRead of size 2 at addr qmp_cmd_name: qmp_capabilities, arguments: {}\n\nThe issue is a race condition in vcs_write(). When the console_lock is\ntemporarily dropped (to copy data from userspace), the vc_data pointer\nobtained from vcs_vc() may become stale. After re-acquiring the lock,\nvcs_vc() is called again to re-validate the pointer. If the vc has been\ndeallocated in the meantime, vcs_vc() returns NULL, and the while loop\nbreaks (with written > 0). However, after the loop, vcs_scr_updated(vc)\nis still called with the now-NULL vc pointer, leading to a null pointer\ndereference in the notifier chain (vcs_notifier dereferences param->vc).\n\nFix this by adding a NULL check for vc before calling vcs_scr_updated()."}],"providerMetadata":{"dateUpdated":"2026-07-19T11:59:32.732Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/43a6281790273c1b0a9ab76609ff0245b968f1e6"},{"url":"https://git.kernel.org/stable/c/b6bbb85cf45bf0b070e741997fe0af3a772c5ad5"},{"url":"https://git.kernel.org/stable/c/ff4806202749a51938236214adc0281481a57366"},{"url":"https://git.kernel.org/stable/c/8232fca738011ca2ec865b46ec721d1796dc0580"},{"url":"https://git.kernel.org/stable/c/73049768ad57145acd337102c5aa3c788e6642c8"},{"url":"https://git.kernel.org/stable/c/7cc3dd79777f6ae4625ec37e84dd18a26dc88bde"},{"url":"https://git.kernel.org/stable/c/74be188eb2dc1c99d63986167b9a67d415fe7326"},{"url":"https://git.kernel.org/stable/c/09a43e81279b8da15526da09877134b8bcf618b0"},{"url":"https://git.kernel.org/stable/c/a287620312dc6dcb9a093417a0e589bf30fcf38a"}],"title":"vc_screen: fix null-ptr-deref in vcs_notifier() during concurrent vcs_write","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53385","datePublished":"2026-07-19T11:59:32.732Z","dateReserved":"2026-06-09T07:44:35.401Z","dateUpdated":"2026-07-19T11:59:32.732Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 12:16:49","lastModifiedDate":"2026-07-19 12:16:49","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53385","Ordinal":"1","Title":"vc_screen: fix null-ptr-deref in vcs_notifier() during concurren","CVE":"CVE-2026-53385","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53385","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nvc_screen: fix null-ptr-deref in vcs_notifier() during concurrent vcs_write\n\nA KASAN null-ptr-deref was observed in vcs_notifier():\n\nBUG: KASAN: null-ptr-deref in vcs_notifier+0x98/0x130\nRead of size 2 at addr qmp_cmd_name: qmp_capabilities, arguments: {}\n\nThe issue is a race condition in vcs_write(). When the console_lock is\ntemporarily dropped (to copy data from userspace), the vc_data pointer\nobtained from vcs_vc() may become stale. After re-acquiring the lock,\nvcs_vc() is called again to re-validate the pointer. If the vc has been\ndeallocated in the meantime, vcs_vc() returns NULL, and the while loop\nbreaks (with written > 0). However, after the loop, vcs_scr_updated(vc)\nis still called with the now-NULL vc pointer, leading to a null pointer\ndereference in the notifier chain (vcs_notifier dereferences param->vc).\n\nFix this by adding a NULL check for vc before calling vcs_scr_updated().","Type":"Description","Title":"vc_screen: fix null-ptr-deref in vcs_notifier() during concurren"}]}}}