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CVE-2023-53386

Bluetooth: Fix potential use-after-free when clear keys

HIGH
7.8
CVSS Score
Published: September 18, 2025 at 01:33 PM UTC
Updated: August 5, 2026 at 10:24 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix potential use-after-free when clear keys Similar to commit c5d2b6fa26b5 ("Bluetooth: Fix use-after-free in hci_remove_ltk/hci_remove_irk"). We can not access k after kfree_rcu() call.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
5.11 ≤ v < 5.15.1325.16 ≤ v < 6.1.535.7 ≤ v < 5.10.1955.7 ≤ v < 5.15.1325.7 ≤ v < 6.1.535.7 ≤ v < 6.4.165.7 ≤ v < 6.5.35.7 ≤ v < 6.66.2 ≤ v < 6.4.166.5 ≤ v < 6.5.35.7d7d41682efc25d58b5bd8b80e85e3c9ce586635c
Vendor states this is fixed in 35cc42f04bc49f0656f6840cb7451b3df6049649 (fixed)
Vendor states this is fixed in 3673952cf0c6cf81b06c66a0b788abeeb02ff3ae (fixed)
Vendor states this is fixed in 942d8cefb022f384d5424f8b90c7878f3f93726f (fixed)
Vendor states this is fixed in 94617b736c25091b60e514e2e7aeafcbbee6b700 (fixed)
Vendor states this is fixed in da19f35868dfbecfff4f81166c054d2656cb1be4 (fixed)
Vendor states this is fixed in e87da6a0ac6e631454e7da53a76aa9fe44aaa5dd (fixed)
Vendor states this is fixed in 5.10.195 (unaffected)
Vendor states this is fixed in 5.15.132 (unaffected)
Vendor states this is fixed in 5.7 (unaffected)
Vendor states this is fixed in 6.1.53 (unaffected)
Vendor states this is fixed in 6.4.16 (unaffected)
Vendor states this is fixed in 6.5.3 (unaffected)
Vendor states this is fixed in 6.6 (unaffected)

References (6)

Patch
Source: cverecord
https://git.kernel.org/stable/c/e87da6a0ac6e631454e7da53a76aa9fe44aaa5dd
Patch
Source: cverecord
https://git.kernel.org/stable/c/942d8cefb022f384d5424f8b90c7878f3f93726f
Patch
Source: cverecord
https://git.kernel.org/stable/c/94617b736c25091b60e514e2e7aeafcbbee6b700
Patch
Source: cverecord
https://git.kernel.org/stable/c/da19f35868dfbecfff4f81166c054d2656cb1be4
Patch
Source: cverecord
https://git.kernel.org/stable/c/35cc42f04bc49f0656f6840cb7451b3df6049649
Patch
Source: cverecord
https://git.kernel.org/stable/c/3673952cf0c6cf81b06c66a0b788abeeb02ff3ae

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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