CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix undefined behavior in interpreter sdiv/smod for INT_MIN The BPF interpreter's signed 32-bit division and modulo handlers use the kernel abs() macro on s32 operands. The abs() macro documentation (include/linux/math.h) explicitly states the result is undefined when the input is the type minimum. When DST contains S32_MIN (0x80000000), abs((s32)DST) triggers undefined behavior and returns S32_MIN unchanged on arm64/x86. This value is then sign-extended to u64 as 0xFFFFFFFF80000000, causing do_div() to compute the wrong result. The verifier's abstract interpretation (scalar32_min_max_sdiv) computes the mathematically correct result for range tracking, creating a verifier/interpreter mismatch that can be exploited for out-of-bounds map value access. Introduce abs_s32() which handles S32_MIN correctly by casting to u32 before negating, avoiding signed overflow entirely. Replace all 8 abs((s32)...) call sites in the interpreter's sdiv32/smod32 handlers. s32 is the only affected case -- the s64 division/modulo handlers do not use abs().
Засегнати продукти
- Linux Linux: ec0e2da95f72d4a46050a4d994e4fe471474fd80 преди 694ea55f1b1c74f9942d91ec366ae9e822422e42; ec0e2da95f72d4a46050a4d994e4fe471474fd80 преди 9ab1227765c446942f290c83382f0b19887c55cf; ec0e2da95f72d4a46050a4d994e4fe471474fd80 преди f14ca604c0ff274fba19f73f1f0485c0047c1396; ec0e2da95f72d4a46050a4d994e4fe471474fd80 преди 0d5d8c3ce45c734aaf3c51cbef59155a6746157d; ec0e2da95f72d4a46050a4d994e4fe471474fd80 преди c77b30bd1dcb61f66c640ff7d2757816210c7cb0
- Linux Linux: 6.6; преди 6.6; 6.6.131 до 6.6.*; 6.12.80 до 6.12.*; 6.18.21 до 6.18.*; 6.19.11 до 6.19.*; от 7.0 нататък
Вид слабост
История
- 22 април 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-31525
- https://nvd.nist.gov/vuln/detail/CVE-2026-31525
- https://git.kernel.org/stable/c/694ea55f1b1c74f9942d91ec366ae9e822422e42
- https://git.kernel.org/stable/c/9ab1227765c446942f290c83382f0b19887c55cf
- https://git.kernel.org/stable/c/f14ca604c0ff274fba19f73f1f0485c0047c1396
- https://git.kernel.org/stable/c/0d5d8c3ce45c734aaf3c51cbef59155a6746157d
- https://git.kernel.org/stable/c/c77b30bd1dcb61f66c640ff7d2757816210c7cb0