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CVE-2026-53385: Linux

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    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().

    Засегнати продукти

    • Linux Linux: 11dddfbb7a4e62489b01074d6c04d9d1b42e4047 преди 43a6281790273c1b0a9ab76609ff0245b968f1e6; e3d1adcad5b73c7ed0c7edb35ab68abcaa45cf67 преди b6bbb85cf45bf0b070e741997fe0af3a772c5ad5; 3338d0b9acde770ee588eead5cac32c25e7048fc преди ff4806202749a51938236214adc0281481a57366; 8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357 преди 8232fca738011ca2ec865b46ec721d1796dc0580; 8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357 преди 73049768ad57145acd337102c5aa3c788e6642c8; 8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357 преди 7cc3dd79777f6ae4625ec37e84dd18a26dc88bde; 8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357 преди 74be188eb2dc1c99d63986167b9a67d415fe7326; 8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357 преди 09a43e81279b8da15526da09877134b8bcf618b0; 8fb9ea65c9d1338b0d2bb0a9122dc942cdd32357 преди a287620312dc6dcb9a093417a0e589bf30fcf38a; 934de9a9b659785fed3e820bc0c813a460c71fea; 0deff678157333d775af190f84696336cdcccd6d; a4e3c4c65ae8510e01352c9a4347e05c035b2ce2; 1de42e7653d6714a7507ba6696151a1fa028c69f; 5.10.181 преди 5.10.260; 5.15.113 преди 5.15.211; 6.1.30 преди 6.1.177; 4.14.327 преди 4.15; 4.19.284 преди 4.20; 5.4.244 преди 5.5; 6.3.4 преди 6.4
    • Linux Linux: 6.4; преди 6.4; 5.10.260 до 5.10.*; 5.15.211 до 5.15.*; 6.1.177 до 6.1.*; 6.6.144 до 6.6.*; 6.12.95 до 6.12.*; 6.18.37 до 6.18.*; 7.0.14 до 7.0.*; 7.1.2 до 7.1.*; от 7.2 нататък

    История

    • 19 юли 2026 Публикувано

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    CVE-2026-53385: Linux | freedomonline.bg