Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: clk: scpi: bound-check DVFS index in scpi_dvfs_recalc_rate dvfs_get_idx() may return an out-of-range index if the SCP firmware is buggy or returns a stale value. Only negative indexes were rejected, so a large index walked past info->opps and could treat garbage as a clock rate (KASAN OOB / wrong frequency to consumers). The missing upper bound dates back to the original SCPI clock driver. Treat indexes >= opp count as invalid and return 0, same as idx < 0.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund5 Oct 2026WID-SEC-2026-3743

  Linux Kernel: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-98221CVE-2026-98181CVE-2026-98248+204 more CVEs

[ References ]References

• git.kernel.org/stable/c/0f89e2ac0e945da2ce798f6a61aebf9d291c2e0a
• git.kernel.org/stable/c/108c46e8dacc4a0e472a74f98171115d49cbc079
• git.kernel.org/stable/c/56b7a9d89c67932bf11b71e3b6d17941fc24a393
• git.kernel.org/stable/c/6e3b55823da8ef0d99621efb422cc29f50d7f280
• git.kernel.org/stable/c/70f4b78d560e592cbf3325b162424737d032fc1d
• git.kernel.org/stable/c/7204095917aeaac89db7377c29a457351a19b076
• git.kernel.org/stable/c/a82b274697d0876b478594ca78ad1e6cb062467b
• git.kernel.org/stable/c/e1188332a9110cf3635fe286481ee38305b3c2b6