--- cve: "CVE-2026-53385" severity: "LOW" cvss: 3.1 epss: "13%" vendor: "Linux" kev: false exploited: false published: "2026-07-19 12:16:49" tags: [cve, security, low] source: tsecurity.de CVE-Dossier exported: "2026-09-08T20:59:52+02:00" --- # CVE-2026-53385 > 3.1 LOW ## Beschreibung In the Linux kernel, the following vulnerability has been resolved: vc_screen: fix null-ptr-deref in vcs_notifier() during concurrent vcs_write A KASAN null-ptr-deref was observed in vcs_notifier(): BUG: KASAN: null-ptr-deref in vcs_notifier+0x98/0x130 Read of size 2 at addr qmp_cmd_name: qmp_capabilities, arguments: {} The issue is a race condition in vcs_write(). When the console_lock is temporarily dropped (to copy data from userspace), the vc_data pointer obtained from vcs_vc() may become stale. After re-acquiring the lock, vcs_vc() is called again to re-validate the pointer. If the vc has been deallocated in the meantime, vcs_vc() returns NULL, and the while loop breaks (with written > 0). However, after the loop, vcs_scr_updated(vc) is still called with the now-NULL vc pointer, leading to a null pointer dereference in the notifier chain (vcs_notifier dereferences param->vc). Fix this by adding a NULL check for vc before calling vcs_scr_updated(). ## Patch verfügbar (OSV) - Kernel ≥ 5.10.260 - Kernel ≥ 5.15.211 - Kernel ≥ 6.1.177 - Kernel ≥ 6.6.144 - Kernel ≥ 6.12.95 - Kernel ≥ 6.18.37 - Kernel ≥ 7.0.14 - Kernel ≥ 7.1.2 ## Referenzen - - - - - - - - - --- _Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-53385) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_