{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53385", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.401Z", "datePublished": "2026-07-19T11:59:32.732Z", "dateUpdated": "2026-07-19T11:59:32.732Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T11:59:32.732Z"}, "descriptions": [{"lang": "en", "value": "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()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/vt/vc_screen.c"], "versions": [{"version": "11dddfbb7a4e62489b01074d6c04d9d1b42e4047", "lessThan": "43a6281790273c1b0a9ab76609ff0245b968f1e6", "status": "affected", "versionType": "git"}, {"version": "e3d1adcad5b73c7ed0c7edb35ab68abcaa45cf67", "lessThan": "b6bbb85cf45bf0b070e741997fe0af3a772c5ad5", "status": "affected", "versionType": "git"}, {"version": "3338d0b9acde770ee588eead5cac32c25e7048fc", "lessThan": "ff4806202749a51938236214adc0281481a57366", "status": "affected", "versionType": "git"}, {"version": "8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357", "lessThan": "8232fca738011ca2ec865b46ec721d1796dc0580", "status": "affected", "versionType": "git"}, {"version": "8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357", "lessThan": "73049768ad57145acd337102c5aa3c788e6642c8", "status": "affected", "versionType": "git"}, {"version": "8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357", "lessThan": "7cc3dd79777f6ae4625ec37e84dd18a26dc88bde", "status": "affected", "versionType": "git"}, {"version": "8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357", "lessThan": "74be188eb2dc1c99d63986167b9a67d415fe7326", "status": "affected", "versionType": "git"}, {"version": "8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357", "lessThan": "09a43e81279b8da15526da09877134b8bcf618b0", "status": "affected", "versionType": "git"}, {"version": "8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357", "lessThan": "a287620312dc6dcb9a093417a0e589bf30fcf38a", "status": "affected", "versionType": "git"}, {"version": "934de9a9b659785fed3e820bc0c813a460c71fea", "status": "affected", "versionType": "git"}, {"version": "0deff678157333d775af190f84696336cdcccd6d", "status": "affected", "versionType": "git"}, {"version": "a4e3c4c65ae8510e01352c9a4347e05c035b2ce2", "status": "affected", "versionType": "git"}, {"version": "1de42e7653d6714a7507ba6696151a1fa028c69f", "status": "affected", "versionType": "git"}, {"version": "5.10.181", "lessThan": "5.10.260", "status": "affected", "versionType": "semver"}, {"version": "5.15.113", "lessThan": "5.15.211", "status": "affected", "versionType": "semver"}, {"version": "6.1.30", "lessThan": "6.1.177", "status": "affected", "versionType": "semver"}, {"version": "4.14.327", "lessThan": "4.15", "status": "affected", "versionType": "semver"}, {"version": "4.19.284", "lessThan": "4.20", "status": "affected", "versionType": "semver"}, {"version": "5.4.244", "lessThan": "5.5", "status": "affected", "versionType": "semver"}, {"version": "6.3.4", "lessThan": "6.4", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/vt/vc_screen.c"], "versions": [{"version": "6.4", "status": "affected"}, {"version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.260", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.211", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.177", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.144", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.95", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.37", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.14", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.2", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.181", "versionEndExcluding": "5.10.260"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.113", "versionEndExcluding": "5.15.211"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.30", "versionEndExcluding": "6.1.177"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.6.144"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12.95"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.18.37"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.0.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.1.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.2-rc1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.327"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.284"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.244"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3.4"}]}]}], "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"}}}}

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