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Vulnerability record · CVE-2026-53091 · published 24 June 2026

CVE-2026-53091: Linux kernel vulnerability

Linux · Linux Kernel

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.

8.4 CVSS 3.1 High EPSS 0.14% · top 97.5% CWE-131 · CWE-131
8.4CVSS 3.1 base score
0.14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
9References
14 Sep 2026Last modified by NVD

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/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/7fb4c19670110f052c04e1ec1d2b953b9f4f57e4 Patch
https://git.kernel.org/stable/c/9d4f5c68f5ad4ab425f3ce1500c97c9f9743999a Patch
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/errata/RHSA-2026:67150
https://access.redhat.com/security/cve/CVE-2026-53091 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2492270 Third Party Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53091.json Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-53091), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.