SB20260918200 - Improper Check or Handling of Exceptional Conditions in Linux kernel riscv net

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-92517)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to improper handling of exceptional conditions in the RISC-V BPF JIT compiler's arena load_acquire handling when executing a BPF program containing a faulting PROBE_ATOMIC load_acquire. A local user can trigger the fault and leak a stale register value through a map to disclose sensitive information.

Remediation

Install update from vendor's website.

References

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