CVE-2026-52956: Linux, грешка в паметта

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: libceph: Fix potential out-of-bounds access in __ceph_x_decrypt() In __ceph_x_decrypt(), a part of the buffer p is interpreted as a ceph_x_encrypt_header, and the magic field of this struct is accessed. This happens without any guarantee that the buffer is large enough to hold this struct. The function parameter ciphertext_len represents the length of the ciphertext to decrypt and is guaranteed to be at most the remaining size of the allocated buffer p. However, this value is not necessarily greater than sizeof(ceph_x_encrypt_header). E.g., a message frame of type FRAME_TAG_AUTH_REPLY_MORE, that is just as long to hold the ciphertext at its end with a ciphertext_len of 8 or less, can trigger an out-of-bounds memory access when accessing hdr->magic. This patch fixes the issue by adding a check to ensure that the decrypted plaintext in the buffer is large enough to represent at least the ceph_x_encrypt_header.

Засегнати продукти

• Linux Linux: e15fd0a11db00fc7f470a9fc804657ec3f6d04a5 преди c417b7d2d1c7fdc25af24490201320e36a3cc21d; e15fd0a11db00fc7f470a9fc804657ec3f6d04a5 преди 759053333a40c6997c2917dcd6160bfe40d2b42e; e15fd0a11db00fc7f470a9fc804657ec3f6d04a5 преди ebc7eddf6225b87e3aae720875f9dd40cb6b1cef; e15fd0a11db00fc7f470a9fc804657ec3f6d04a5 преди 5df268406ef38d0f92547959296577c7077dacdc; e15fd0a11db00fc7f470a9fc804657ec3f6d04a5 преди c7e9b53aebe401970f1b5f5a01b4e021b18e8bb2; e15fd0a11db00fc7f470a9fc804657ec3f6d04a5 преди 821365487aa58d06bda65c676ba215d506ba9768; 2982b9c92a66604ffb9fb2db54cf735133d1ef56; 4.9.6 преди 4.10
• Linux Linux: 4.10; преди 4.10; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.57 до 6.18.*; 7.0.10 до 7.0.*; 7.1 до *

Вид слабост

• CWE-125 Четене извън границите на буфера

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-52956
• https://nvd.nist.gov/vuln/detail/CVE-2026-52956
• https://git.kernel.org/stable/c/c417b7d2d1c7fdc25af24490201320e36a3cc21d
• https://git.kernel.org/stable/c/759053333a40c6997c2917dcd6160bfe40d2b42e
• https://git.kernel.org/stable/c/ebc7eddf6225b87e3aae720875f9dd40cb6b1cef
• https://git.kernel.org/stable/c/5df268406ef38d0f92547959296577c7077dacdc
• https://git.kernel.org/stable/c/c7e9b53aebe401970f1b5f5a01b4e021b18e8bb2
• https://git.kernel.org/stable/c/821365487aa58d06bda65c676ba215d506ba9768