Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos In case of malformed relocation record of kind BPF_CORE_TYPE_ID_LOCAL referencing a non-existing BTF type, function bpf_core_calc_relo_insn would cause a null pointer deference. Fix this by adding a proper check upper in call stack, as malformed relocation records could be passed from user space. Simplest reproducer is a program: r0 = 0 exit With a single relocation record: .insn_off = 0, /* patch first instruction */ .type_id = 100500, /* this type id does not exist */ .access_str_off = 6, /* offset of string "0" */ .kind = BPF_CORE_TYPE_ID_LOCAL, See the link for original reproducer or next commit for a test case.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.17, < 6.1.113 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/2288b54b96dcb55bedebcef3572bb8821fc5e708Patch
- https://git.kernel.org/stable/c/3d2786d65aaa954ebd3fcc033ada433e10da21c4Patch
- https://git.kernel.org/stable/c/584cd3ff792e1edbea20b2a7df55897159b0be3ePatch
- https://git.kernel.org/stable/c/dc7ce14f00bcd50641f2110b7a32aa6552e0780fPatch
- https://git.kernel.org/stable/c/e7e9c5b2dda29067332df2a85b0141a92b41f218Patch
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
FAQ
What is CVE-2024-49850?
CVE-2024-49850 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos In case of malformed relocation record of kind BPF_CORE_TYPE_ID_LOCAL...
How severe is CVE-2024-49850?
CVE-2024-49850 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-49850?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.