Към съдържанието
Търсене

CVE-2026-98044: Linux

Няма оценка

CVSS

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: bpf: Reject legacy packet loads from callbacks check_ld_abs() models a failed BPF_LD_ABS or BPF_LD_IND in a subprogram as an implicit return with R0 set to zero. It calls prepare_func_exit() to explore this synthesized path. When the load is reached directly from a synchronous callback, prepare_func_exit() enforces the callback return contract and marks R0 precise. R0 is not derived from a real instruction on this path, so precision backtracking reaches the callback call with R0 still requested and triggers the "callback unexpected regs" verifier bug. A privileged program loader can therefore cause a verifier warning and an -EFAULT BPF_PROG_LOAD. These legacy packet-load instructions are deprecated. Reject them from callbacks rather than complicating their implicit-return model. Check all active frames before constructing the implicit return so nested static subprograms cannot hide the callback context. Global functions are verified independently with a fresh frame zero, so an active-frame check cannot identify a global function called from a callback. Also check the complete subprogram call graph during stack-depth validation and reject a function containing a legacy load when any caller is a callback. This covers global and static descendants without making has_ld_abs transitive, preserving its per-function BTF return-type check. Ordinary uses outside callbacks remain supported.

    Засегнати продукти

    • Linux Linux: 8674e2db06cff6b50f2216eed9a761d15425bb34 преди cebda2a2bb4183550eae9dcf888c16407b4fffda; ce01a4e5cfac7adbe0be565f90cd32ecbb2f8337 преди 3484a99303912db62428494a9061212049027e57; ee861486e377edc55361c08dcbceab3f6b6577bd преди bc489c0c9b8c86bd7fac42cfd1bb152f042fca56; ee861486e377edc55361c08dcbceab3f6b6577bd преди e7d28823c662128caae63f14e16bd394916c139b; 928d354ae3557e8f755a227e67be88034eb3cd7f; 8a800497d9f6c2ec9c2c1ba7b71d0ac2ea7f7bbe; de1055e7f9e67af32b1f3376066272b04e5223c0; 37ad2bb11e9de92cb7b94548705eeedd87f7d392; d846d83bdacbd8f14fc45c63b8c1d22608452e1c; 6.12.101 преди 6.12.114; 6.18.42 преди 6.18.53; 5.10.265 преди 5.11; 5.15.216 преди 5.16; 6.1.183 преди 6.2; 6.6.148 преди 6.7; 7.0.10 преди 7.1
    • Linux Linux: 7.1; преди 7.1; 6.12.114 до 6.12.*; 6.18.53 до 6.18.*; 7.2.7 до 7.2.*; от 7.3 нататък

    История

    • 25 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-98044: Linux | freedomonline.bg