Vulnerability-Lookup

GHSA-JG7R-P8W6-9PMQ

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-19 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn

__set_chan_timer() takes a l2cap_chan reference via l2cap_chan_hold() before scheduling the delayed work. The normal path in l2cap_chan_timeout() drops this reference with l2cap_chan_put() at the end, but the early return when chan->conn is NULL skips the put, leaking the reference.

Add the missing l2cap_chan_put() before the early return.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-63948"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:13Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn\n\n__set_chan_timer() takes a l2cap_chan reference via l2cap_chan_hold()\nbefore scheduling the delayed work.  The normal path in\nl2cap_chan_timeout() drops this reference with l2cap_chan_put() at the\nend, but the early return when chan-\u003econn is NULL skips the put,\nleaking the reference.\n\nAdd the missing l2cap_chan_put() before the early return.",
  "id": "GHSA-jg7r-p8w6-9pmq",
  "modified": "2026-07-19T18:31:47Z",
  "published": "2026-07-19T18:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63948"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08d81fe96f80a8e20c7acb573b6a45d901fcf2cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/107c826e4ef9ec5ad8f60e6fe64d8d5325ba508f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50f1bcaaaa3a80bb1c3472044bc146e8d49d51ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/63cd225cc13d782a85e2a73c04d0d350153eada1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8894c2010435a56ce7c6c2a8785860c13554df2f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9dbd84990394c51f5cee1e8871bb5ff8af5ed939"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b5c59a5b469e2a809a2d57eda4ded94235971060"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e8a5baff5be273ca07771fd2b9bb1f2a4152917b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-63948 (GCVE-0-2026-63948)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55

Title

Bluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn __set_chan_timer() takes a l2cap_chan reference via l2cap_chan_hold() before scheduling the delayed work. The normal path in l2cap_chan_timeout() drops this reference with l2cap_chan_put() at the end, but the early return when chan->conn is NULL skips the put, leaking the reference. Add the missing l2cap_chan_put() before the early return.

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/50f1bcaaaa3a80bb1…
https://git.kernel.org/stable/c/b5c59a5b469e2a809…
https://git.kernel.org/stable/c/8894c2010435a56ce…
https://git.kernel.org/stable/c/63cd225cc13d782a8…
https://git.kernel.org/stable/c/107c826e4ef9ec5ad…
https://git.kernel.org/stable/c/e8a5baff5be273ca0…
https://git.kernel.org/stable/c/08d81fe96f80a8e20…
https://git.kernel.org/stable/c/9dbd84990394c51f5…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 06acb75e7ed600d0bbf7bff5628aa8f24a97978c , < 50f1bcaaaa3a80bb1c3472044bc146e8d49d51ee (git) Affected: e97e16433eb4533083b096a3824b93a5ca3aee79 , < b5c59a5b469e2a809a2d57eda4ded94235971060 (git) Affected: 8960ff650aec70485b40771cd8e6e8c4cb467d33 , < 8894c2010435a56ce7c6c2a8785860c13554df2f (git) Affected: 955b5b6c54d95b5e7444dfc81c95c8e013f27ac0 , < 63cd225cc13d782a85e2a73c04d0d350153eada1 (git) Affected: adf0398cee86643b8eacde95f17d073d022f782c , < 107c826e4ef9ec5ad8f60e6fe64d8d5325ba508f (git) Affected: adf0398cee86643b8eacde95f17d073d022f782c , < e8a5baff5be273ca07771fd2b9bb1f2a4152917b (git) Affected: adf0398cee86643b8eacde95f17d073d022f782c , < 08d81fe96f80a8e20c7acb573b6a45d901fcf2cd (git) Affected: adf0398cee86643b8eacde95f17d073d022f782c , < 9dbd84990394c51f5cee1e8871bb5ff8af5ed939 (git) Affected: e137e2ba96e51902dc2878131823a96bf8e638ae (git) Affected: 6466ee65e5b27161c846c73ef407f49dfa1bd1d9 (git) Affected: eb86f955488c39526534211f2610e48a5cf8ead4 (git) Affected: 5.10.217 , < 5.10.259 (semver) Affected: 5.15.159 , < 5.15.210 (semver) Affected: 6.1.91 , < 6.1.176 (semver) Affected: 6.6.31 , < 6.6.143 (semver) Affected: 4.19.314 , < 4.20 (semver) Affected: 5.4.276 , < 5.5 (semver) Affected: 6.8.10 , < 6.9 (semver)
Linux	Linux	Affected: 6.9 Unaffected: 0 , < 6.9 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.93 , ≤ 6.12.* (semver) Unaffected: 6.18.35 , ≤ 6.18.* (semver) Unaffected: 7.0.12 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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        }
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          "url": "https://git.kernel.org/stable/c/9dbd84990394c51f5cee1e8871bb5ff8af5ed939"
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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.

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GHSA-JG7R-P8W6-9PMQ

CVE-2026-63948 (GCVE-0-2026-63948)

Tags

Sightings

Nomenclature