Vulnerability-Lookup

GHSA-M2XH-Q35X-H5F5

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-08 15:31

Details

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43093"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T10:16:22Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: tighten UMEM headroom validation to account for tailroom and min frame\n\nThe current headroom validation in xdp_umem_reg() could leave us with\ninsufficient space dedicated to even receive minimum-sized ethernet\nframe. Furthermore if multi-buffer would come to play then\nskb_shared_info stored at the end of XSK frame would be corrupted.\n\nHW typically works with 128-aligned sizes so let us provide this value\nas bare minimum.\n\nMulti-buffer setting is known later in the configuration process so\nbesides accounting for 128 bytes, let us also take care of tailroom space\nupfront.",
  "id": "GHSA-m2xh-q35x-h5f5",
  "modified": "2026-05-08T15:31:15Z",
  "published": "2026-05-06T12:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43093"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-11 22:17

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

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/a03975beb9f6af0d8…
https://git.kernel.org/stable/c/0ec4d3f6e6934deb8…
https://git.kernel.org/stable/c/9ea6ba4f3195dcba6…
https://git.kernel.org/stable/c/6523bc1b40e69301f…
https://git.kernel.org/stable/c/a315e022a72d95ef5…

Impacted products

2 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)
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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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/xdp/xdp_umem.c"
          ],
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              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.12.83",
              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "semver"
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        }
      ],
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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        "dateUpdated": "2026-05-11T22:17:35.645Z",
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Sightings

Author	Source	Type	Date	Other

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.

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GHSA-M2XH-Q35X-H5F5

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

Tags

Sightings

Nomenclature