CVE-2026-53071 (GCVE-0-2026-53071)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-07-23 12:08
VLAI
Title
Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp l2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding l2cap_chan_lock(). Every other l2cap_chan_del() caller in the file acquires the lock first. A remote BLE device can send a crafted L2CAP ECRED reconfiguration response to corrupt the channel list while another thread is iterating it. Add l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(), and l2cap_chan_unlock() and l2cap_chan_put() after, matching the pattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5 (High)
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 96dca51715d86559ed6ed8028e5445cecb80f3ae (git)
Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 330b20ec97916961ee0e6c29c06bc0fa7c96e64c (git)
Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 0ccd75c51f620374086f359e906917676e699a1c (git)
Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 77a853aec710b2fdf41fa298ea3cbc9a4358f917 (git)
Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14 (git)
Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < dc89961b76f12aff47124c1df4bdb32a080f4d0c (git)
Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 5501d055a1ce3c747141e3955ba8cf034d193f3e (git)
Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 42776497cdbc9a665b384a6dcb85f0d4bd927eab (git)
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Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:6.12.0-211.37.1.el10_2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:4.18.0-553.146.1.rt7.487.el8_10 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::nfv
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:4.18.0-553.146.1.el8_10 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:5.14.0-687.29.1.el9_8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
    cpe:/o:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
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Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53071\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-24T17:17:20.843\",\"lastModified\":\"2026-07-23T12:18:26.597\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp\\n\\nl2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding\\nl2cap_chan_lock(). Every other l2cap_chan_del() caller in the file\\nacquires the lock first. A remote BLE device can send a crafted\\nL2CAP ECRED reconfiguration response to corrupt the channel list\\nwhile another thread is iterating it.\\n\\nAdd l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(),\\nand l2cap_chan_unlock() and l2cap_chan_put() after, matching the\\npattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/bluetooth/l2cap_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"96dca51715d86559ed6ed8028e5445cecb80f3ae\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"330b20ec97916961ee0e6c29c06bc0fa7c96e64c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"0ccd75c51f620374086f359e906917676e699a1c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"77a853aec710b2fdf41fa298ea3cbc9a4358f917\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"dc89961b76f12aff47124c1df4bdb32a080f4d0c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"5501d055a1ce3c747141e3955ba8cf034d193f3e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"42776497cdbc9a665b384a6dcb85f0d4bd927eab\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/bluetooth/l2cap_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"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\":\"6.6.141\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.91\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.33\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"affectedData\":[{\"vendor\":\"Red 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Party Advisory\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:42552\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:42919\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:43307\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/security/cve/CVE-2026-53071\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2492458\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53071.json\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-22T15:03:38+00:00",
      "cve": "CVE-2026-53071",
      "id": "CVE-2026-53071",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:fixed": "762",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53071.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-21T23:51:18Z",
      "cve": "CVE-2026-53071",
      "id": "CVE-2026-53071",
      "initial_release_date": "2026-07-01T03:19:15Z",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "106",
      "product_status:recommended": "312",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53071",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53071.json",
      "version": "7"
    }
  }
}



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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.