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CVE-2026-53385

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.1%
Linux•Linux•Versions : 4.14.327, a4e3c4c65ae8510e01352c9a4347e05c035b2ce2, <=6.1.*, <=7.0.*, <=6.12.*, 6.6.144, 934de9a9b659785fed3e820bc0c813a460c71fea, <5.15.211, 5.15.211, <8232fca738011ca2ec865b46ec721d1796dc0580, 7.0.14, 11dddfbb7a4e62489b01074d6c04d9d1b42e4047, 5.10.181, <7cc3dd79777f6ae4625ec37e84dd18a26dc88bde, 0, <6.1.177, 5.4.244, <=7.1.*, 3338d0b9acde770ee588eead5cac32c25e7048fc, 6.4, 1de42e7653d6714a7507ba6696151a1fa028c69f, 5.10.260, 6.3.4, <4.20, <=5.10.*, <=6.6.*, 6.12.95, <43a6281790273c1b0a9ab76609ff0245b968f1e6, 0deff678157333d775af190f84696336cdcccd6d, 8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357, 6.1.30, <6.4, <09a43e81279b8da15526da09877134b8bcf618b0, 7.1.2, <73049768ad57145acd337102c5aa3c788e6642c8, <74be188eb2dc1c99d63986167b9a67d415fe7326, <a287620312dc6dcb9a093417a0e589bf30fcf38a, <5.5, 6.18.37, <=6.18.*, <ff4806202749a51938236214adc0281481a57366, 4.19.284, 6.1.177, e3d1adcad5b73c7ed0c7edb35ab68abcaa45cf67, <5.10.260, <=*, <=5.15.*, 5.15.113, <b6bbb85cf45bf0b070e741997fe0af3a772c5ad5, <4.15, 7.2

Description

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().

Gravité et risque d'exploitation

CVE-2026-53385 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.13 %, ce qui la place devant 2.5 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 4.14.327, a4e3c4c65ae8510e01352c9a4347e05c035b2ce2, <=6.1.*, <=7.0.*, <=6.12.*, 6.6.144, 934de9a9b659785fed3e820bc0c813a460c71fea, <5.15.211, 5.15.211, <8232fca738011ca2ec865b46ec721d1796dc0580, 7.0.14, 11dddfbb7a4e62489b01074d6c04d9d1b42e4047, 5.10.181, <7cc3dd79777f6ae4625ec37e84dd18a26dc88bde, 0, <6.1.177, 5.4.244, <=7.1.*, 3338d0b9acde770ee588eead5cac32c25e7048fc, 6.4, 1de42e7653d6714a7507ba6696151a1fa028c69f, 5.10.260, 6.3.4, <4.20, <=5.10.*, <=6.6.*, 6.12.95, <43a6281790273c1b0a9ab76609ff0245b968f1e6, 0deff678157333d775af190f84696336cdcccd6d, 8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357, 6.1.30, <6.4, <09a43e81279b8da15526da09877134b8bcf618b0, 7.1.2, <73049768ad57145acd337102c5aa3c788e6642c8, <74be188eb2dc1c99d63986167b9a67d415fe7326, <a287620312dc6dcb9a093417a0e589bf30fcf38a, <5.5, 6.18.37, <=6.18.*, <ff4806202749a51938236214adc0281481a57366, 4.19.284, 6.1.177, e3d1adcad5b73c7ed0c7edb35ab68abcaa45cf67, <5.10.260, <=*, <=5.15.*, 5.15.113, <b6bbb85cf45bf0b070e741997fe0af3a772c5ad5, <4.15, 7.2) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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