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CVE-2026-80546: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Improve CCA CPRB length and overflow checks The xcrb_msg_to_type6cprb_msgx() function lacks proper input validation, creating security vulnerabilities: 1. Integer overflow after CEIL4 alignment: Signed int variables could overflow during 4-byte boundary alignment, causing undersized buffer allocations or incorrect bounds checking. 2. Missing minimum size validation: The CPRBX structure is copied from userspace without verifying sufficient buffer length. Undersized buffers cause uninitialized memory access when reading structure fields like cprbx.cprb_len and cprbx.domain. 3. Arithmetic overflow in sum calculations: Adding control block and data block sizes could overflow, bypassing size checks and enabling buffer overflows. Fix by using size_t for length calculations, adding U32_MAX boundary checks after alignment, validating minimum control block size before copying from userspace, and detecting sum calculation overflows.

    Засегнати продукти

    • Linux Linux: 20b0b0159390fa5c00a435195649680fefda81e0 преди 584400144020f40365de3972c4763da520e7280e; e2c6d91eb8b1533753755f07803e47eceed263d0 преди 50fe5133dcb46449daf2435fa705264364411129; e2c6d91eb8b1533753755f07803e47eceed263d0 преди 35ac6754ba6da45fd193f5ce3f665f7490b830d5; f9da85d4780515f65983e0af151458599adaef3d; 6.12.114 преди 6.13
    • Linux Linux: 7.1; преди 7.1; 7.1.10 до 7.1.*; 7.2 до *

    История

    • 26 август 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-80546: Linux | freedomonline.bg