Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: bpf: mark a NULL call argument precise check_func_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. check_helper_call() enforces second parameter of the bpf_get_local_storage() to be zero, w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Grouping these two into one patch, as they share the same fixes tag.

[ 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-Bund24 Sep 2026WID-SEC-2026-3579

  Linux Kernel: Multiple vulnerabilities Translated from German

  CVE-2026-97615CVE-2026-97978CVE-2026-98127+590 more CVEs

[ References ]References

• git.kernel.org/stable/c/1a3a10b030c96ea88868ccc060a16827c01eaa5a
• git.kernel.org/stable/c/627089c278df58749f25686c6a3caf7e181b5951
• git.kernel.org/stable/c/69a9ad004ccf5d45e534c7d503f47f643abe64b7
• git.kernel.org/stable/c/b1fe6379e401b8ce0f561cb4d84af2b70b4343c3
• git.kernel.org/stable/c/febbb66e682d8328f7c5bcbdd5e4291abab2e858