CVE-2026-80960: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: dm-pcache: validate on-media seg_num against the cache device size seg_num is read from the crc32c-only superblock, so whoever supplies the cache device on a table load (CAP_SYS_ADMIN) controls it. It sizes cache->segments[] and is the value every later on-media segment id is bounded against, yet it is never checked against the device. Because cache_dev->mapping is the direct map of the pmem, CACHE_DEV_SEGMENT() for a segment id past the device resolves to ordinary kernel memory beyond the mapping; a new-cache init reaching such an id has cache_seg_init() -> cache_dev_zero_range() memset() 12 KiB over that memory -- an out-of-bounds write into the kernel heap at table load. A zero seg_num makes the segment allocations ZERO_SIZE_PTR. Reject a seg_num that is zero, larger than the device can hold, or larger than PCACHE_CACHE_SEGS_MAX before it is used.

Засегнати продукти

• Linux Linux: 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 преди 91b93fe5cf4d62d5ecc642a6c8f15a3c11b00e3c; 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 преди e889c0ee81165fc90aad2979b51f930f77895703; 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 преди 62d92e45abe9e087370f9fc5d876b95673aced34
• Linux Linux: 6.18; преди 6.18; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 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-2026-80960
• https://nvd.nist.gov/vuln/detail/CVE-2026-80960
• https://git.kernel.org/stable/c/91b93fe5cf4d62d5ecc642a6c8f15a3c11b00e3c
• https://git.kernel.org/stable/c/e889c0ee81165fc90aad2979b51f930f77895703
• https://git.kernel.org/stable/c/62d92e45abe9e087370f9fc5d876b95673aced34