Vulnerability-Lookup

FKIE_CVE-2026-74559

Vulnerability from fkie_nvd - Published: 2026-08-15 13:18 - Updated: 2026-08-17 06:19

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: xsk: drain continuation descs after overflow in xsk_build_skb() Fix generic xmit path multi-buffer logic when packets are either too big (count of descriptors exceed MAX_SKB_FRAGS) or an invalid descriptor is included in fragmented packet. Introduce xdp_sock::drain_cont and act upon this flag - when it is set, keep on consuming descriptors from AF_XDP Tx ring and put them directly onto Cq. Previously these descriptors were silently lost and could never be reached again.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5e94d74e4f3baebaa083288f33b4be7ce0a34982
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bd44a6dcd4248883de90f5dad53ae80066e27096
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ceb00cb87a22c42d20c39336213db2b843ca9e34

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/xdp_sock.h",
            "net/xdp/xsk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ceb00cb87a22c42d20c39336213db2b843ca9e34",
              "status": "affected",
              "version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a",
              "versionType": "git"
            },
            {
              "lessThan": "5e94d74e4f3baebaa083288f33b4be7ce0a34982",
              "status": "affected",
              "version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a",
              "versionType": "git"
            },
            {
              "lessThan": "bd44a6dcd4248883de90f5dad53ae80066e27096",
              "status": "affected",
              "version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/net/xdp_sock.h",
            "net/xdp/xsk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: drain continuation descs after overflow in xsk_build_skb()\n\nFix generic xmit path multi-buffer logic when packets are either too big\n(count of descriptors exceed MAX_SKB_FRAGS) or an invalid descriptor is\nincluded in fragmented packet. Introduce xdp_sock::drain_cont and act\nupon this flag - when it is set, keep on consuming descriptors from\nAF_XDP Tx ring and put them directly onto Cq. Previously these\ndescriptors were silently lost and could never be reached again."
    }
  ],
  "id": "CVE-2026-74559",
  "lastModified": "2026-08-17T06:19:54.007",
  "metrics": {},
  "published": "2026-08-15T13:18:01.390",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5e94d74e4f3baebaa083288f33b4be7ce0a34982"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bd44a6dcd4248883de90f5dad53ae80066e27096"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ceb00cb87a22c42d20c39336213db2b843ca9e34"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-74559 (GCVE-0-2026-74559)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:28 – Updated: 2026-08-17 05:21

Title

xsk: drain continuation descs after overflow in xsk_build_skb()

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/ceb00cb87a22c42d2…
https://git.kernel.org/stable/c/5e94d74e4f3baebaa…
https://git.kernel.org/stable/c/bd44a6dcd4248883d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: cf24f5a5feeaae34c1a34d1e04f8ac697290427a , < ceb00cb87a22c42d20c39336213db2b843ca9e34 (git) Affected: cf24f5a5feeaae34c1a34d1e04f8ac697290427a , < 5e94d74e4f3baebaa083288f33b4be7ce0a34982 (git) Affected: cf24f5a5feeaae34c1a34d1e04f8ac697290427a , < bd44a6dcd4248883de90f5dad53ae80066e27096 (git)
Linux	Linux	Affected: 6.6 Unaffected: 0 , < 6.6 (semver) Unaffected: 6.18.44 , ≤ 6.18.* (semver) Unaffected: 7.1.8 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/xdp_sock.h",
            "net/xdp/xsk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ceb00cb87a22c42d20c39336213db2b843ca9e34",
              "status": "affected",
              "version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a",
              "versionType": "git"
            },
            {
              "lessThan": "5e94d74e4f3baebaa083288f33b4be7ce0a34982",
              "status": "affected",
              "version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a",
              "versionType": "git"
            },
            {
              "lessThan": "bd44a6dcd4248883de90f5dad53ae80066e27096",
              "status": "affected",
              "version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/net/xdp_sock.h",
            "net/xdp/xsk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.44",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.8",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: drain continuation descs after overflow in xsk_build_skb()\n\nFix generic xmit path multi-buffer logic when packets are either too big\n(count of descriptors exceed MAX_SKB_FRAGS) or an invalid descriptor is\nincluded in fragmented packet. Introduce xdp_sock::drain_cont and act\nupon this flag - when it is set, keep on consuming descriptors from\nAF_XDP Tx ring and put them directly onto Cq. Previously these\ndescriptors were silently lost and could never be reached again."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:21:46.240Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ceb00cb87a22c42d20c39336213db2b843ca9e34"
        },
        {
          "url": "https://git.kernel.org/stable/c/5e94d74e4f3baebaa083288f33b4be7ce0a34982"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd44a6dcd4248883de90f5dad53ae80066e27096"
        }
      ],
      "title": "xsk: drain continuation descs after overflow in xsk_build_skb()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74559",
    "datePublished": "2026-08-15T12:28:03.279Z",
    "dateReserved": "2026-08-15T05:44:03.916Z",
    "dateUpdated": "2026-08-17T05:21:46.240Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.