CVE-2026-63835 (GCVE-0-2026-63835)

Vulnerability from cvelistv5 – Published: 2026-07-19 12:02 – Updated: 2026-07-19 12:02
VLAI
Title
batman-adv: v: prevent OGM aggregation on disabled hardif
Summary
In the Linux kernel, the following vulnerability has been resolved: batman-adv: v: prevent OGM aggregation on disabled hardif When an interface gets disabled, the worker is correctly disabled by batadv_hardif_disable_interface() -> ... -> batadv_v_ogm_iface_disable(). In this process, the skb aggr_list is also freed. But batadv_v_ogm_send_meshif() can still queue new skbs (via batadv_v_ogm_queue_on_if()) to the aggr_list. This will only stop after all cores can no longer find the RCU protected list of hard interfaces. These queued skbs will never be freed or consumed by batadv_v_ogm_aggr_work. The batadv_v_ogm_iface_disable() function must block batadv_v_ogm_queue_on_if() to avoid leak of skbs.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f89255a02f1d75d8e1b9d1c31435fcb64840cb2a , < d462ced79dd430200cf888984e8005da77fc810b (git)
Affected: f89255a02f1d75d8e1b9d1c31435fcb64840cb2a , < f79deaaf822ab0ee2424cf28781f9ab91576bea3 (git)
Affected: f89255a02f1d75d8e1b9d1c31435fcb64840cb2a , < d3569327fc7395b2b0461a0a0cb77a0bb74786c0 (git)
Affected: f89255a02f1d75d8e1b9d1c31435fcb64840cb2a , < 97644fdaaf6446ffbe182c5eb804fceb5b1a51b7 (git)
Affected: f89255a02f1d75d8e1b9d1c31435fcb64840cb2a , < f04dde74399431fb07abbdd9cd5d0ed624771d04 (git)
Affected: f89255a02f1d75d8e1b9d1c31435fcb64840cb2a , < 3d4548c96d6f21ac1a9b06c5f82f3ef439c87023 (git)
Affected: f89255a02f1d75d8e1b9d1c31435fcb64840cb2a , < 86ab6b6fb5b82163bf6c45780bb72150021d7349 (git)
Affected: f89255a02f1d75d8e1b9d1c31435fcb64840cb2a , < d11c00b95b2a3b3934007fc003dccc6fdcc061ad (git)
Create a notification for this product.
Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.10.260 , ≤ 5.10.* (semver)
Unaffected: 5.15.211 , ≤ 5.15.* (semver)
Unaffected: 6.1.177 , ≤ 6.1.* (semver)
Unaffected: 6.6.144 , ≤ 6.6.* (semver)
Unaffected: 6.12.95 , ≤ 6.12.* (semver)
Unaffected: 6.18.38 , ≤ 6.18.* (semver)
Unaffected: 7.1.3 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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              "status": "unaffected",
              "version": "7.1.3",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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                  "versionEndExcluding": "5.10.260",
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                  "vulnerable": true
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: v: prevent OGM aggregation on disabled hardif\n\nWhen an interface gets disabled, the worker is correctly disabled by\nbatadv_hardif_disable_interface() -\u003e ... -\u003e batadv_v_ogm_iface_disable().\nIn this process, the skb aggr_list is also freed.\n\nBut batadv_v_ogm_send_meshif() can still queue new skbs (via\nbatadv_v_ogm_queue_on_if()) to the aggr_list. This will only stop after all\ncores can no longer find the RCU protected list of hard interfaces. These\nqueued skbs will never be freed or consumed by batadv_v_ogm_aggr_work.\n\nThe batadv_v_ogm_iface_disable() function must block\nbatadv_v_ogm_queue_on_if() to avoid leak of skbs."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T12:02:26.574Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/d462ced79dd430200cf888984e8005da77fc810b"
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        {
          "url": "https://git.kernel.org/stable/c/f79deaaf822ab0ee2424cf28781f9ab91576bea3"
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      "title": "batman-adv: v: prevent OGM aggregation on disabled hardif",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63835",
    "datePublished": "2026-07-19T12:02:26.574Z",
    "dateReserved": "2026-07-19T07:54:57.015Z",
    "dateUpdated": "2026-07-19T12:02:26.574Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-07-21",
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    },
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      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "batman-adv: v: prevent OGM aggregation on disabled hardif",
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      "version": "2"
    },
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These\\nqueued skbs will never be freed or consumed by batadv_v_ogm_aggr_work.\\n\\nThe batadv_v_ogm_iface_disable() function must block\\nbatadv_v_ogm_queue_on_if() to avoid leak of skbs.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/batman-adv/bat_v.c\",\"net/batman-adv/bat_v_ogm.c\",\"net/batman-adv/types.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f89255a02f1d75d8e1b9d1c31435fcb64840cb2a\",\"lessThan\":\"d462ced79dd430200cf888984e8005da77fc810b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f89255a02f1d75d8e1b9d1c31435fcb64840cb2a\",\"lessThan\":\"f79deaaf822ab0ee2424cf28781f9ab91576bea3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f89255a02f1d75d8e1b9d1c31435fcb64840cb2a\",\"lessThan\":\"d3569327fc7395b2b0461a0a0cb77a0bb74786c0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f89255a02f1d75d8e1b9d1c31435fcb64840cb2a\",\"lessThan\":\"97644fdaaf6446ffbe182c5eb804fceb5b1a51b7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f89255a02f1d75d8e1b9d1c31435fcb64840cb2a\",\"lessThan\":\"f04dde74399431fb07abbdd9cd5d0ed624771d04\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f89255a02f1d75d8e1b9d1c31435fcb64840cb2a\",\"lessThan\":\"3d4548c96d6f21ac1a9b06c5f82f3ef439c87023\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f89255a02f1d75d8e1b9d1c31435fcb64840cb2a\",\"lessThan\":\"86ab6b6fb5b82163bf6c45780bb72150021d7349\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f89255a02f1d75d8e1b9d1c31435fcb64840cb2a\",\"lessThan\":\"d11c00b95b2a3b3934007fc003dccc6fdcc061ad\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/batman-adv/bat_v.c\",\"net/batman-adv/bat_v_ogm.c\",\"net/batman-adv/types.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.260\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.211\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.177\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.144\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.95\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.38\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.3\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3d4548c96d6f21ac1a9b06c5f82f3ef439c87023\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/86ab6b6fb5b82163bf6c45780bb72150021d7349\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/97644fdaaf6446ffbe182c5eb804fceb5b1a51b7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d11c00b95b2a3b3934007fc003dccc6fdcc061ad\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d3569327fc7395b2b0461a0a0cb77a0bb74786c0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d462ced79dd430200cf888984e8005da77fc810b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f04dde74399431fb07abbdd9cd5d0ed624771d04\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f79deaaf822ab0ee2424cf28781f9ab91576bea3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-07-21T08:07:19+00:00",
      "cve": "CVE-2026-63835",
      "id": "CVE-2026-63835",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: batman-adv: v: prevent OGM aggregation on disabled hardif",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63835.json",
      "version": "3"
    }
  }
}



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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

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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.