Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix may_goto with negative offset. Zac's syzbot crafted a bpf prog that exposed two bugs in may_goto. The 1st bug is the way may_goto is patched. When offset is negative it should be patched differently. The 2nd bug is in the verifier: when current state may_goto_depth is equal to visited state may_goto_depth it means there is an actual infinite loop. It's not correct to prune exploration of the program at this point. Note, that this check doesn't limit the program to only one may_goto insn, since 2nd and any further may_goto will increment may_goto_depth only in the queued state pushed for future exploration. The current state will have may_goto_depth == 0 regardless of number of may_goto insns and the verifier has to explore the program until bpf_exit.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.9, < 6.9.8 |
References
- https://git.kernel.org/stable/c/175827e04f4be53f3dfb57edf12d0d49b18fd939Patch
- https://git.kernel.org/stable/c/2b2efe1937ca9f8815884bd4dcd5b32733025103Patch
- https://git.kernel.org/stable/c/175827e04f4be53f3dfb57edf12d0d49b18fd939Patch
- https://git.kernel.org/stable/c/2b2efe1937ca9f8815884bd4dcd5b32733025103Patch
FAQ
What is CVE-2024-42072?
CVE-2024-42072 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: bpf: Fix may_goto with negative offset. Zac's syzbot crafted a bpf prog that exposed two bugs in may_goto. The 1st bug is the way ...
How severe is CVE-2024-42072?
CVE-2024-42072 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-42072?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.