CVE-2026-43093

high

In the Linux kernel, the following vulnerability has been resolved: xsk: tighten UMEM headroom validation to account for tailroom and min frame The current h…

Vendor / product: Linux — linux kernel

In the Linux kernel, the following vulnerability has been resolved: xsk: tighten UMEM headroom validation to account for tailroom and min frame The current headroom validation in xdp_umem_reg() could leave us with insufficient space dedicated to even receive minimum-sized ethernet frame. Furthermore if multi-buffer would come to play then skb_shared_info stored at the end of XSK frame would be corrupted. HW typically works with 128-aligned sizes so let us provide this value as bare minimum. Multi-buffer setting is known later in the configuration process so besides accounting for 128 bytes, let us also take care of tailroom space upfront.

CVSS

7.8

7.8 (CVSS v3.1)

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

Severity source: NVD CVSS v3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

Timeline (UTC)

Published: 2026-05-06 10:16

Modified: 2026-11-11 21:10

NVD status: Modified

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 ≥4.19.118 <4.20, ≥5.4.35 <5.5, ≥5.6.7 <5.7, ≥5.7.1 <6.6.136, ≥6.7 <6.12.83, ≥6.13 <6.18.24

Weakness classification (CWE)

NVD-CWE-noinfo CWE-787

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/0ec4d3f6e6934deb843b561ae048cd17218e5ad1

Patch / mitigation: https://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39

Patch / mitigation: https://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12

Patch / mitigation: https://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f

Patch / mitigation: https://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931

References

https://git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/1a6051cd7e3e4c54ff3854a43b638b9292af5e67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/5f123bc278bf4e3283d8606321bebbfd299f4384 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/8769708add9eadeea8041a9761771bb715a87104 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://cert-portal.siemens.com/productcert/html/ssa-784472.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

Data sources

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

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CVE-2026-43093

Affected products

Weakness classification (CWE)

Mitigation & advisories

References

Data sources

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