Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_u32: use skb_header_pointer_careful() skb_header_pointer() does not fully validate negative @offset values. Use skb_header_pointer_careful() instead. GangMin Kim provided a report and a repro fooling u32_classify(): BUG: KASAN: slab-out-of-bounds in u32_classify+0x1180/0x11b0 net/sched/cls_u32.c:221
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.35.1, < 6.6.124 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/13336a6239b9d7c6e61483017bb8bdfe3ceb10a5Patch
- https://git.kernel.org/stable/c/8a672f177ebe19c93d795fbe967846084fbc7943Patch
- https://git.kernel.org/stable/c/cabd1a976375780dabab888784e356f574bbaed8Patch
- https://git.kernel.org/stable/c/cfa745830e45ecb75c061aa34330ee0cac941cc7
- https://git.kernel.org/stable/c/e41a23e61259f5526af875c3b86b3d42a9bae0e5Patch
FAQ
What is CVE-2026-23204?
CVE-2026-23204 is a vulnerability with a CVSS score of 7.1 (HIGH). In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_u32: use skb_header_pointer_careful() skb_header_pointer() does not fully validate negative @offset values. Use sk...
How severe is CVE-2026-23204?
CVE-2026-23204 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-23204?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.