CVE-2026-52912 (GCVE-0-2026-52912)

Vulnerability from cvelistv5 – Published: 2026-06-24 07:14 – Updated: 2026-06-28 06:36
VLAI
Title
netfilter: nf_queue: hold bridge skb->dev while queued
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_queue: hold bridge skb->dev while queued br_pass_frame_up() rewrites skb->dev from the ingress port to the bridge master before queueing bridge LOCAL_IN packets. NFQUEUE only holds references on state.in/out and bridge physdevs, so a queued bridge packet can retain a freed bridge master in skb->dev until reinjection. When the verdict is reinjected later, br_netif_receive_skb() re-enters the receive path with skb->dev still pointing at the freed bridge master, triggering a use-after-free. Store skb->dev in the queue entry, hold a reference on it for the queue lifetime, and use the saved device when dropping queued packets during NETDEV_DOWN handling.
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: ac28634456867b23b95faccba7997a62ec430603 , < 950d809f154dca04e5fbe5d3c8b9c5e44769cd57 (git)
Affected: ac28634456867b23b95faccba7997a62ec430603 , < a698ac8ab2561cf575d2d9f34095032651dd952e (git)
Affected: ac28634456867b23b95faccba7997a62ec430603 , < 19924bdd8a45ebc72a7b84c57fd63057d1dc75ac (git)
Affected: ac28634456867b23b95faccba7997a62ec430603 , < 1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be (git)
Affected: ac28634456867b23b95faccba7997a62ec430603 , < 3823c27099cfe2482299065814adbaa771be9644 (git)
Affected: ac28634456867b23b95faccba7997a62ec430603 , < 15d464265120ab9818bd673af301deee09bedab2 (git)
Affected: ac28634456867b23b95faccba7997a62ec430603 , < 3fb0f5c0f64162a8c3f25616a4f1e340b921737f (git)
Affected: ac28634456867b23b95faccba7997a62ec430603 , < e196115ec330a18de415bdb9f5071aa9f08e53ce (git)
Create a notification for this product.
Linux Linux Affected: 4.7
Unaffected: 0 , < 4.7 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 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)
Create a notification for this product.
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{
  "containers": {
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          "programFiles": [
            "include/net/netfilter/nf_queue.h",
            "net/netfilter/nf_queue.c",
            "net/netfilter/nfnetlink_queue.c"
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          ],
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          "vendor": "Linux",
          "versions": [
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            },
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              "version": "0",
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              "status": "unaffected",
              "version": "5.10.259",
              "versionType": "semver"
            },
            {
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              "version": "5.15.209",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.1.175",
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            },
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              "status": "unaffected",
              "version": "6.12.92",
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              "status": "unaffected",
              "version": "6.18.34",
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              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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                  "versionStartIncluding": "4.7",
                  "vulnerable": true
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                  "versionEndExcluding": "5.15.209",
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                  "vulnerable": true
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_queue: hold bridge skb-\u003edev while queued\n\nbr_pass_frame_up() rewrites skb-\u003edev from the ingress port to the bridge\nmaster before queueing bridge LOCAL_IN packets. NFQUEUE only holds\nreferences on state.in/out and bridge physdevs, so a queued bridge\npacket can retain a freed bridge master in skb-\u003edev until reinjection.\n\nWhen the verdict is reinjected later, br_netif_receive_skb() re-enters\nthe receive path with skb-\u003edev still pointing at the freed bridge master,\ntriggering a use-after-free.\n\nStore skb-\u003edev in the queue entry, hold a reference on it for the queue\nlifetime, and use the saved device when dropping queued packets during\nNETDEV_DOWN handling."
        }
      ],
      "metrics": [
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            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-28T06:36:30.468Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/950d809f154dca04e5fbe5d3c8b9c5e44769cd57"
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        {
          "url": "https://git.kernel.org/stable/c/e196115ec330a18de415bdb9f5071aa9f08e53ce"
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      ],
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-52912",
    "datePublished": "2026-06-24T07:14:10.583Z",
    "dateReserved": "2026-06-09T07:44:35.366Z",
    "dateUpdated": "2026-06-28T06:36:30.468Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-06-29",
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NFQUEUE only holds\\nreferences on state.in/out and bridge physdevs, so a queued bridge\\npacket can retain a freed bridge master in skb-\u003edev until reinjection.\\n\\nWhen the verdict is reinjected later, br_netif_receive_skb() re-enters\\nthe receive path with skb-\u003edev still pointing at the freed bridge master,\\ntriggering a use-after-free.\\n\\nStore skb-\u003edev in the queue entry, hold a reference on it for the queue\\nlifetime, and use the saved device when dropping queued packets during\\nNETDEV_DOWN handling.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"include/net/netfilter/nf_queue.h\",\"net/netfilter/nf_queue.c\",\"net/netfilter/nfnetlink_queue.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"ac28634456867b23b95faccba7997a62ec430603\",\"lessThan\":\"950d809f154dca04e5fbe5d3c8b9c5e44769cd57\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac28634456867b23b95faccba7997a62ec430603\",\"lessThan\":\"a698ac8ab2561cf575d2d9f34095032651dd952e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac28634456867b23b95faccba7997a62ec430603\",\"lessThan\":\"19924bdd8a45ebc72a7b84c57fd63057d1dc75ac\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac28634456867b23b95faccba7997a62ec430603\",\"lessThan\":\"1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac28634456867b23b95faccba7997a62ec430603\",\"lessThan\":\"3823c27099cfe2482299065814adbaa771be9644\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac28634456867b23b95faccba7997a62ec430603\",\"lessThan\":\"15d464265120ab9818bd673af301deee09bedab2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac28634456867b23b95faccba7997a62ec430603\",\"lessThan\":\"3fb0f5c0f64162a8c3f25616a4f1e340b921737f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ac28634456867b23b95faccba7997a62ec430603\",\"lessThan\":\"e196115ec330a18de415bdb9f5071aa9f08e53ce\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"include/net/netfilter/nf_queue.h\",\"net/netfilter/nf_queue.c\",\"net/netfilter/nfnetlink_queue.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.259\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.142\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.92\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.34\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.11\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/15d464265120ab9818bd673af301deee09bedab2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/19924bdd8a45ebc72a7b84c57fd63057d1dc75ac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3823c27099cfe2482299065814adbaa771be9644\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3fb0f5c0f64162a8c3f25616a4f1e340b921737f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/950d809f154dca04e5fbe5d3c8b9c5e44769cd57\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a698ac8ab2561cf575d2d9f34095032651dd952e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e196115ec330a18de415bdb9f5071aa9f08e53ce\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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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.


Detection rules are retrieved from Rulezet.