CVE-2026-74752: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: sctp: validate cookie AUTH state before use When cookie authentication is disabled, COOKIE_ECHO restores fixed-size AUTH fields directly from peer-controlled cookie bytes. A forged RANDOM length, HMAC list, or CHUNKS list can then reach association consumers with lengths or identifiers that were never validated against the local backing arrays. A forged RANDOM length can cause out-of-bounds reads during key-vector construction. A forged HMAC identifier also caused a 32-byte write past a zero-length AUTH chunk, providing a primitive for a local privilege escalation chain. Validate the cookie's RANDOM, HMACS, and CHUNKS parameters at the cookie trust boundary before copying them into the association. Reject invalid types, malformed lengths, unsupported HMAC identifiers, HMAC lists without SHA1, and forbidden chunk ids.

Засегнати продукти

• Linux Linux: 1f485649f52929d9937b346a920a522a7363e202 преди 4a4410de8dc6903d859c9e1731fc6dcee28bd072; 1f485649f52929d9937b346a920a522a7363e202 преди 7f17984cfa697613800eb693e183b06884129bd3; 1f485649f52929d9937b346a920a522a7363e202 преди 88619b117be1daf633ce32210570ce35a0bd1c98; 1f485649f52929d9937b346a920a522a7363e202 преди 3dbb44d88b1e94dd31fe43588af7437b34b44d56
• Linux Linux: 2.6.24; преди 2.6.24; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 7.1.10 до 7.1.*; от 7.2 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-74752
• https://nvd.nist.gov/vuln/detail/CVE-2026-74752
• https://git.kernel.org/stable/c/4a4410de8dc6903d859c9e1731fc6dcee28bd072
• https://git.kernel.org/stable/c/7f17984cfa697613800eb693e183b06884129bd3
• https://git.kernel.org/stable/c/88619b117be1daf633ce32210570ce35a0bd1c98
• https://git.kernel.org/stable/c/3dbb44d88b1e94dd31fe43588af7437b34b44d56