CVE-2026-45927: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: bpf: Require frozen map for calculating map hash Currently, bpf_map_get_info_by_fd calculates and caches the hash of the map regardless of the map's frozen state. This leads to a TOCTOU bug where userspace can call BPF_OBJ_GET_INFO_BY_FD to cache the hash and then modify the map contents before freezing. Therefore, a trusted loader can be tricked into verifying the stale hash while loading the modified contents. Fix this by returning -EPERM if the map is not frozen when the hash is requested. This ensures the hash is only generated for the final, immutable state of the map.

Засегнати продукти

• Linux Linux: ea2e6467ac36bf3d785defc89e58269b15d182f7 преди 7752d36343862323bbeea4ce3adf0ec2ed86e122; ea2e6467ac36bf3d785defc89e58269b15d182f7 преди f415e114b58fe02c41191e47f24bdabb438daf72; ea2e6467ac36bf3d785defc89e58269b15d182f7 преди a2c86aa621c22f2a7e26c654f936d65cfff0aa91
• Linux Linux: 6.18; преди 6.18; 6.18.14 до 6.18.*; 6.19.4 до 6.19.*; от 7.0 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-2026-45927
• https://nvd.nist.gov/vuln/detail/CVE-2026-45927
• https://git.kernel.org/stable/c/7752d36343862323bbeea4ce3adf0ec2ed86e122
• https://git.kernel.org/stable/c/f415e114b58fe02c41191e47f24bdabb438daf72
• https://git.kernel.org/stable/c/a2c86aa621c22f2a7e26c654f936d65cfff0aa91