CVE-2026-92517

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.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/08fe2eaa609180c1baeb76c2629a9c82263b0427
https://git.kernel.org/stable/c/26d9496c826586338d1b8c27edfec4a19a89f462
https://git.kernel.org/stable/c/5eb8921371c6fd117d4a328b6053dfda38707df8

Configurations

No configuration.

History

17 Sep 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 17:17

Updated : 2026-09-17 17:17

NVD link : CVE-2026-92517

Mitre link : CVE-2026-92517

CVE.ORG link : CVE-2026-92517

JSON object : View

Products Affected

No product.

CWE

No CWE.

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