FKIE_CVE-2026-63835

Vulnerability from fkie_nvd - Published: 2026-07-19 12:16 - Updated: 2026-07-19 12:16
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3d4548c96d6f21ac1a9b06c5f82f3ef439c87023
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/86ab6b6fb5b82163bf6c45780bb72150021d7349
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/97644fdaaf6446ffbe182c5eb804fceb5b1a51b7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d11c00b95b2a3b3934007fc003dccc6fdcc061ad
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d3569327fc7395b2b0461a0a0cb77a0bb74786c0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d462ced79dd430200cf888984e8005da77fc810b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f04dde74399431fb07abbdd9cd5d0ed624771d04
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f79deaaf822ab0ee2424cf28781f9ab91576bea3
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "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",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d462ced79dd430200cf888984e8005da77fc810b",
              "status": "affected",
              "version": "f89255a02f1d75d8e1b9d1c31435fcb64840cb2a",
              "versionType": "git"
            },
            {
              "lessThan": "f79deaaf822ab0ee2424cf28781f9ab91576bea3",
              "status": "affected",
              "version": "f89255a02f1d75d8e1b9d1c31435fcb64840cb2a",
              "versionType": "git"
            },
            {
              "lessThan": "d3569327fc7395b2b0461a0a0cb77a0bb74786c0",
              "status": "affected",
              "version": "f89255a02f1d75d8e1b9d1c31435fcb64840cb2a",
              "versionType": "git"
            },
            {
              "lessThan": "97644fdaaf6446ffbe182c5eb804fceb5b1a51b7",
              "status": "affected",
              "version": "f89255a02f1d75d8e1b9d1c31435fcb64840cb2a",
              "versionType": "git"
            },
            {
              "lessThan": "f04dde74399431fb07abbdd9cd5d0ed624771d04",
              "status": "affected",
              "version": "f89255a02f1d75d8e1b9d1c31435fcb64840cb2a",
              "versionType": "git"
            },
            {
              "lessThan": "3d4548c96d6f21ac1a9b06c5f82f3ef439c87023",
              "status": "affected",
              "version": "f89255a02f1d75d8e1b9d1c31435fcb64840cb2a",
              "versionType": "git"
            },
            {
              "lessThan": "86ab6b6fb5b82163bf6c45780bb72150021d7349",
              "status": "affected",
              "version": "f89255a02f1d75d8e1b9d1c31435fcb64840cb2a",
              "versionType": "git"
            },
            {
              "lessThan": "d11c00b95b2a3b3934007fc003dccc6fdcc061ad",
              "status": "affected",
              "version": "f89255a02f1d75d8e1b9d1c31435fcb64840cb2a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "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",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "lessThan": "5.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.260",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.211",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.177",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.144",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.38",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "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\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."
    }
  ],
  "id": "CVE-2026-63835",
  "lastModified": "2026-07-19T12:16:56.970",
  "metrics": {},
  "published": "2026-07-19T12:16:56.970",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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