CVE-2026-43093 (GCVE-0-2026-43093)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-11 22:17
VLAI?
Title
xsk: tighten UMEM headroom validation to account for tailroom and min frame
Summary
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.
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 , < a03975beb9f6af0d8ac051e30b2abeabe618414f (git)
Affected: 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 , < 0ec4d3f6e6934deb843b561ae048cd17218e5ad1 (git)
Affected: 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 , < 9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12 (git)
Affected: 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 , < 6523bc1b40e69301f24c14338b762af4739d6d39 (git)
Affected: 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 , < a315e022a72d95ef5f1d4e58e903cb492b0ad931 (git)
Affected: ad8fb61c184fe0f8d1e0b5b954d010fb9f94a6ee (git)
Affected: 25c9cdef57488578da21d99eb614b97ffcf6e59f (git)
Affected: 98d3c852e63b49129515dd18c875999efaf8530a (git)
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Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.