CVE-2026-43092

medium

In the Linux kernel, the following vulnerability has been resolved: xsk: validate MTU against usable frame size on bind AF_XDP bind currently accepts zero-co…

Vendor / product: Linux — linux kernel

In the Linux kernel, the following vulnerability has been resolved: xsk: validate MTU against usable frame size on bind AF_XDP bind currently accepts zero-copy pool configurations without verifying that the device MTU fits into the usable frame space provided by the UMEM chunk. This becomes a problem since we started to respect tailroom which is subtracted from chunk_size (among with headroom). 2k chunk size might not provide enough space for standard 1500 MTU, so let us catch such settings at bind time. Furthermore, validate whether underlying HW will be able to satisfy configured MTU wrt XSK's frame size multiplied by supported Rx buffer chain length (that is exposed via net_device::xdp_zc_max_segs).

CVSS

5.5

5.5 (CVSS v3.1)

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

Severity source: NVD CVSS v3.1 (nvd@nist.gov)

Timeline (UTC)

Published: 2026-05-06 10:16

Modified: 2026-11-11 21:10

NVD status: Analyzed

Last synced 5 hours ago

Verified against the source API 2026-11-11 21:11 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

linux / linux_kernel ≥6.6 <6.6.136, ≥6.7 <6.12.83, ≥6.13 <6.18.24, ≥6.19 <6.19.14, 7.0

Weakness classification (CWE)

NVD-CWE-noinfo

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Patch / mitigation: https://git.kernel.org/stable/c/25e1e91a8da819924df0b16e3812d7b24c8ce133

Patch / mitigation: https://git.kernel.org/stable/c/36ee60b569ba0dfb6f961333b90d19ab5b323fa9

Patch / mitigation: https://git.kernel.org/stable/c/a55793e5a97d4e39bdb380873a9780fe0010bff6

Patch / mitigation: https://git.kernel.org/stable/c/b2f4daa6422fd6cc0cec969794dab4a88ea4cea1

Patch / mitigation: https://git.kernel.org/stable/c/f669d60db11dbabb96279f2b20f9d1cba43cddb2

References

https://git.kernel.org/stable/c/25e1e91a8da819924df0b16e3812d7b24c8ce133 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/36ee60b569ba0dfb6f961333b90d19ab5b323fa9 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a55793e5a97d4e39bdb380873a9780fe0010bff6 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/b2f4daa6422fd6cc0cec969794dab4a88ea4cea1 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/f669d60db11dbabb96279f2b20f9d1cba43cddb2 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Data sources

NVD CVE API 2.0 — fetched 2026-11-11 21:11 UTC · record ↗

Learn the basics

Understanding CVEs and CVSS Scores

CVE-2026-43092

Affected products

Weakness classification (CWE)

Mitigation & advisories

References

Data sources

Learn the basics

Related CVEs