CVE-2026-64355 (GCVE-0-2026-64355)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-08-17 04:54
VLAI
Title
bpf: Reject fragmented frames in devmap
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject fragmented frames in devmap Devmap broadcast redirects clone the packet for all but the last destination. For native XDP, that clone path copies only the linear xdp_frame data, while fragmented frames keep skb_shared_info in tailroom outside the linear area. Cloning such a frame leaves XDP_FLAGS_HAS_FRAGS set but without valid frag metadata, and the later free path can interpret uninitialized tail data as skb_shared_info, leading to an out-of-bounds access during frame return. Reject fragmented native XDP frames in dev_map_enqueue_clone(). Add the same restriction to the generic XDP clone path in dev_map_redirect_clone(). Generic XDP represents fragmented packets as nonlinear skbs, and rejecting them here keeps clone-based broadcast support aligned between native and generic XDP.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e624d4ed4aa8cc3c69d1359b0aaea539203ed266 , < 47baddc856ae7e93a565dd9deeb797999b179466 (git)
Affected: e624d4ed4aa8cc3c69d1359b0aaea539203ed266 , < 07a4c11ee8ef4abcb39d922e9e410ae269671cdf (git)
Affected: e624d4ed4aa8cc3c69d1359b0aaea539203ed266 , < bccbab36ff228e0825eb85d9b0f9b8434cd0a399 (git)
Affected: e624d4ed4aa8cc3c69d1359b0aaea539203ed266 , < c5b4f5efcb55c1af3fe44ff712d31b7fb098a831 (git)
Affected: e624d4ed4aa8cc3c69d1359b0aaea539203ed266 , < a9bb2d9c798cb62a4050a991c27b752770c33afe (git)
Affected: e624d4ed4aa8cc3c69d1359b0aaea539203ed266 , < 51d07c12ca411e692c424ecdabf077f1e61a61be (git)
Affected: e624d4ed4aa8cc3c69d1359b0aaea539203ed266 , < aa496720618f1a6054f1c870bf10b4f6c99bf656 (git)
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Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-125"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T14:10:48+00:00",
      "cve": "CVE-2026-64355",
      "id": "CVE-2026-64355",
      "initial_release_date": "2026-07-25T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: bpf: Reject fragmented frames in devmap",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64355.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-18T00:41:14Z",
      "cve": "CVE-2026-64355",
      "id": "CVE-2026-64355",
      "initial_release_date": "2026-07-25T16:01:07Z",
      "product_status:first_fixed": "104",
      "product_status:known_affected": "586",
      "product_status:known_not_affected": "147",
      "product_status:recommended": "111",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64355",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64355.json",
      "version": "12"
    }
  }
}



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Taxonomy of the tags.





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

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.



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.