CVE-2026-92517

CVE CVE-2026-92517EUVD EUVD-2026-82138Published 2026-09-17T16:10:25.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: bpf, riscv: Fix extable handling for arena load_acquire emit_atomic_ld_st() returns 1 to have build_body() skip the zext after a sub-word load_acquire. The caller does "ret = ret ?: add_exception_handler(...)", which skips add_exception_handler() on any non-zero ret, so the extable entry is missing and a faulting PROBE_ATOMIC load_acquire oopses. REG_DONT_CLEAR_MARKER leaves rd stale on fault, and the verifier still thinks the load overwrote it, so a program can leak it through a map. Check ret >= 0 before calling add_exception_handler(), and pass rd for LOAD_ACQ so the fault zeroes rd like a PROBE_MEM load. Return ret unchanged for the zext skip.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux patch: 7.3-rc1; 6.18; patch: 6.18.52; fb7cefabae8117c203155ef169a386bec43bbba9 <26d9496c826586338d1b8c27edfec4a19a89f462; fb7cefabae8117c203155ef169a386bec43bbba9 <08fe2eaa609180c1baeb76c2629a9c82263b0427; patch: 7.2.6; patch: 0; fb7cefabae8117c203155ef169a386bec43bbba9 <5eb8921371c6fd117d4a328b6053dfda38707df8

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.