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CVE-2026-64118 (GCVE-0-2026-64118)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-08-05 12:39
VLAI
Title
qed: fix double free in qed_cxt_tables_alloc()
Summary
In the Linux kernel, the following vulnerability has been resolved: qed: fix double free in qed_cxt_tables_alloc() If one of the later PF or VF CID bitmap allocations fails, qed_cid_map_alloc() jumps to cid_map_fail and frees the previously allocated CID bitmaps before returning an error. qed_cxt_tables_alloc() then calls qed_cxt_mngr_free(), which invokes qed_cid_map_free() again. Fix this by setting each CID bitmap pointer to NULL after bitmap_free() to avoid double free. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1-rc3. Runtime reproduction was not attempted because exercising the failing allocation path requires device-specific setup.
Severity
8.4 (High)
CVSS:3.1/AV:L/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: fe56b9e6a8d957d6a20729d626027f800c17a2da , < 9fe030719bd083b766602692ee96c8c985798e3c (git)
Affected: fe56b9e6a8d957d6a20729d626027f800c17a2da , < 06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227 (git)
Affected: fe56b9e6a8d957d6a20729d626027f800c17a2da , < 8cf5e4d2ca6b101d163c7423a426fb0aec34f7bb (git)
Affected: fe56b9e6a8d957d6a20729d626027f800c17a2da , < 3904b993cc17ec5d7c5d3b57dbd0b775dafb9684 (git)
Affected: fe56b9e6a8d957d6a20729d626027f800c17a2da , < bdf678a273cadbccc347f331ae2e93ff4d14834c (git)
Affected: fe56b9e6a8d957d6a20729d626027f800c17a2da , < 0e47fc1c9181ae029e0e35a865cbf2adcbae626c (git)
Affected: fe56b9e6a8d957d6a20729d626027f800c17a2da , < a04c207f0801abdd23a169b5f902a9845059a65a (git)
Affected: fe56b9e6a8d957d6a20729d626027f800c17a2da , < 2bccfb8476ca5f3548afbd623dc7a6980d4e77de (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.4
Unaffected: 0 , < 4.4 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.142 , ≤ 6.6.* (semver)
Unaffected: 6.12.92 , ≤ 6.12.* (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nqed: fix double free in qed_cxt_tables_alloc()\n\nIf one of the later PF or VF CID bitmap allocations fails,\nqed_cid_map_alloc() jumps to cid_map_fail and frees the previously\nallocated CID bitmaps before returning an error. qed_cxt_tables_alloc()\nthen calls qed_cxt_mngr_free(), which invokes qed_cid_map_free()\nagain.\n\nFix this by setting each CID bitmap pointer to NULL after bitmap_free()\nto avoid double free.\n\nThe bug was first flagged by an experimental analysis tool we are\ndeveloping for kernel memory-management bugs while analyzing\nv6.13-rc1. The tool is still under development and is not yet publicly\navailable. Manual inspection confirms that the bug is still\npresent in v7.1-rc3.\n\nRuntime reproduction was not attempted because exercising the failing\nallocation path requires device-specific setup."
          }
        ],
        "id": "CVE-2026-64118",
        "lastModified": "2026-08-13T15:12:01.917",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 8.4,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.5,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-07-19T16:17:53.320",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0e47fc1c9181ae029e0e35a865cbf2adcbae626c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/2bccfb8476ca5f3548afbd623dc7a6980d4e77de"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/3904b993cc17ec5d7c5d3b57dbd0b775dafb9684"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/8cf5e4d2ca6b101d163c7423a426fb0aec34f7bb"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/9fe030719bd083b766602692ee96c8c985798e3c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a04c207f0801abdd23a169b5f902a9845059a65a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/bdf678a273cadbccc347f331ae2e93ff4d14834c"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-415"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-20T17:09:10+00:00",
      "cve": "CVE-2026-64118",
      "id": "CVE-2026-64118",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "15",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: qed: fix double free in qed_cxt_tables_alloc()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64118.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-18T00:43:50Z",
      "cve": "CVE-2026-64118",
      "id": "CVE-2026-64118",
      "initial_release_date": "2026-07-21T12:59:22Z",
      "product_status:first_fixed": "23",
      "product_status:known_affected": "729",
      "product_status:known_not_affected": "4",
      "product_status:recommended": "107",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64118",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64118.json",
      "version": "10"
    }
  }
}



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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

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.


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.