Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: don't rewrite bpf_fastcall patterns entered by a jump mark_fastcall_pattern_for_call() must ensure that matched "spill; call; fill" instruction series is not interrupted by a jump. Otherwise the rewrite applied by bpf_remove_fastcall_spills_fills() is not sound. Record the instructions targeted by jumps in insn_aux_data[*].jump_target when the CFG is built and use this flag to stop growing a pattern at such an instruction. Jumps to the first spill are fine. Note that existing insn_aux_data[*].jmp_point field can't be reused, as it marks subprogram return instructions.
References
- https://git.kernel.org/stable/c/0b1c83dc3c4401cd7e846548f62e3caf3d06742e
- https://git.kernel.org/stable/c/24adbc2c3bbe3385ce922587e1f8e837a68b3e25
- https://git.kernel.org/stable/c/c4d3bdb3ab211dcfad734b02e06fcb12adb4757f
FAQ
What is CVE-2026-98048?
CVE-2026-98048 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: bpf: don't rewrite bpf_fastcall patterns entered by a jump mark_fastcall_pattern_for_call() must ensure that matched "spill; call;...
How severe is CVE-2026-98048?
CVSS scoring is not yet available for CVE-2026-98048. Check NVD for updates.
Is there a patch for CVE-2026-98048?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.