What is CVE-2026-53091?

CVE-2026-53091 is a High severity Linux kernel vulnerability with a CVSS score of 8.4 out of 10, affecting Linux kernel versions from 3.16 onward and patched in 7.0.10 and 7.1. CVE-2026-53091 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53091?

CVE-2026-53091 has a CVSS score of 8.4 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H.

Is there a patch available for CVE-2026-53091?

Yes, CVE-2026-53091 has been patched. Fixed versions include 7.0.10 and 7.1. If you are running Linux kernel 3.16 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53091 actively exploited?

CVE-2026-53091 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-53091

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->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.

Package Linux Kernel

Published 2026-06-24

Last modified 2026-07-23

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.4

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H

Weakness type

CWE-131

CVE-2026-53091 is classified as CWE-131

See CWE-131 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 3.16 and later are affected. Fixed in 7.0.10, 7.1 and their respective stable series.

Affected from

≥ 3.16

Fixed in

✓ 7.0.10 7.0.x ✓ 7.1

References

5 total

Kernel Git
https://git.kernel.org/stable/c/7fb4c19670110f052c04e1ec1d2b953b9f4f57e4

Patch
Kernel Git
https://git.kernel.org/stable/c/9d4f5c68f5ad4ab425f3ce1500c97c9f9743999a

Patch
Red Hat
https://access.redhat.com/security/cve/CVE-2026-53091

Third Party Advisory
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2492270

Third Party Advisory
Red Hat
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53091.json

Third Party Advisory

Details

CVE ID CVE-2026-53091

Severity High

CVSS score 8.4 / 10

CVSS version 3.1

Published 2026-06-24

Modified 2026-07-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53091?

CVE-2026-53091 is a High severity Linux kernel vulnerability with a CVSS score of 8.4 out of 10 . It affects Linux kernel versions from 3.16 onward and has been patched in 7.0.10 and 7.1. CVE-2026-53091 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53091?

CVE-2026-53091 has a CVSS score of 8.4 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H.
Is there a patch available for CVE-2026-53091?

Yes. CVE-2026-53091 has been patched. Fixed versions include 7.0.10 and 7.1. If you are running Linux kernel 3.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53091 actively exploited?

No. CVE-2026-53091 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.