Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: pull headers in qdisc_pkt_len_segs_init() Most ndo_start_xmit() methods expects headers of gso packets to be already in skb->head. net/core/tso.c users are particularly at risk, because tso_build_hdr() does a memcpy(hdr, skb->data, hdr_len); qdisc_pkt_len_segs_init() already does a dissection of gso packets. Use pskb_may_pull() instead of skb_header_pointer() to make sure drivers do not have to reimplement this. Some malicious packets could be fed, detect them so that we can drop them sooner with a new SKB_DROP_REASON_SKB_BAD_GSO drop_reason.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.16, < 7.0.10 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/7fb4c19670110f052c04e1ec1d2b953b9f4f57e4Patch
- https://git.kernel.org/stable/c/9d4f5c68f5ad4ab425f3ce1500c97c9f9743999aPatch
- https://access.redhat.com/security/cve/CVE-2026-53091Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2492270Third Party Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53091.jsonThird Party Advisory
FAQ
What is CVE-2026-53091?
CVE-2026-53091 is a vulnerability with a CVSS score of 8.4 (HIGH). In the Linux kernel, the following vulnerability has been resolved: net: pull headers in qdisc_pkt_len_segs_init() Most ndo_start_xmit() methods expects headers of gso packets to be already in skb->...
How severe is CVE-2026-53091?
CVE-2026-53091 has been rated HIGH with a CVSS base score of 8.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53091?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.