CVE-2026-53091
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,…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.4 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-131
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/7fb4c19670110f052c04e1ec1d2b953b9f4f57e4Patch
- https://git.kernel.org/stable/c/9d4f5c68f5ad4ab425f3ce1500c97c9f9743999aPatch
- https://access.redhat.com/errata/RHSA-2026:65334
- https://access.redhat.com/errata/RHSA-2026:66324
- https://access.redhat.com/errata/RHSA-2026:66325
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.