CVE-2026-53385

Katalog CVE

CVSS 5.5 · Medium EPSS 0,13%

Kerentanan NULL Pointer Dereference pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

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().

Rincian

Terbit di NVD

19 Juli 2026

Terakhir diubah

17 Agustus 2026

Status NVD

Analyzed

CVSS 3.1

5.5 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-476: NULL Pointer Dereference

EPSS (30 hari)

0,13% peluang dieksploitasi; lebih tinggi dari 2,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/09a43e81279b8da15526da09877134b8bcf618b0 patch
• https://git.kernel.org/stable/c/43a6281790273c1b0a9ab76609ff0245b968f1e6 patch
• https://git.kernel.org/stable/c/73049768ad57145acd337102c5aa3c788e6642c8 patch
• https://git.kernel.org/stable/c/74be188eb2dc1c99d63986167b9a67d415fe7326 patch
• https://git.kernel.org/stable/c/7cc3dd79777f6ae4625ec37e84dd18a26dc88bde patch
• https://git.kernel.org/stable/c/8232fca738011ca2ec865b46ec721d1796dc0580 patch
• https://git.kernel.org/stable/c/a287620312dc6dcb9a093417a0e589bf30fcf38a patch
• https://git.kernel.org/stable/c/b6bbb85cf45bf0b070e741997fe0af3a772c5ad5 patch
• https://git.kernel.org/stable/c/ff4806202749a51938236214adc0281481a57366 patch