Vulnerability-Lookup

GHSA-VCWJ-XJX6-GQ5Q

Vulnerability from github – Published: 2026-07-19 12:30 – Updated: 2026-07-19 12:30

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-63835"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T12:16:56Z",
    "severity": null
  },
  "details": "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": "GHSA-vcwj-xjx6-gq5q",
  "modified": "2026-07-19T12:30:24Z",
  "published": "2026-07-19T12:30:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63835"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d4548c96d6f21ac1a9b06c5f82f3ef439c87023"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86ab6b6fb5b82163bf6c45780bb72150021d7349"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/97644fdaaf6446ffbe182c5eb804fceb5b1a51b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d11c00b95b2a3b3934007fc003dccc6fdcc061ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d3569327fc7395b2b0461a0a0cb77a0bb74786c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d462ced79dd430200cf888984e8005da77fc810b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f04dde74399431fb07abbdd9cd5d0ed624771d04"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f79deaaf822ab0ee2424cf28781f9ab91576bea3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-07-19 12:02 – Updated: 2026-07-19 12:02

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

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/d462ced79dd430200…
https://git.kernel.org/stable/c/f79deaaf822ab0ee2…
https://git.kernel.org/stable/c/d3569327fc7395b2b…
https://git.kernel.org/stable/c/97644fdaaf6446ffb…
https://git.kernel.org/stable/c/f04dde74399431fb0…
https://git.kernel.org/stable/c/3d4548c96d6f21ac1…
https://git.kernel.org/stable/c/86ab6b6fb5b82163b…
https://git.kernel.org/stable/c/d11c00b95b2a3b393…

Impacted products

2 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)
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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{
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "5.4"
            },
            {
              "lessThan": "5.4",
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              "version": "0",
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            {
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              "status": "unaffected",
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            {
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.177",
              "versionType": "semver"
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            {
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
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              "versionType": "semver"
            },
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              "versionType": "original_commit_for_fix"
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        {
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}

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.

Action not permitted

GHSA-VCWJ-XJX6-GQ5Q

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

Tags

Sightings

Nomenclature