8.8

CVE-2023-53297: Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp

Modified
AliasesUBUNTU-CVE-2023-53297DEBIAN-CVE-2023-53297
Published 16-09-2025Last modified 05-08-2026

Vulnerability summary

CVE-2023-53297 is a high (CVSS 8.8) vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.22%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 17 · Related 4
RHSA-2024:2394RHSA-2025:19102RHSA-2025:19103RHSA-2025:22006RHSA-2025:22066RHSA-2025:22072

Timeline

  1. 16-09-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp conn->chan_lock isn't acquired before l2cap_get_chan_by_scid, if l2cap_get_chan_by_scid returns NULL, then 'bad unlock balance' is triggered.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.21% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu119 products
  • linux< 5.4.0-162.179 | < 5.15.0-83.92
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1109.118 | < 5.15.0-1044.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ f2d38e77aa5f3effc143e7dd24da8acf02925958, < 5f352a56f0e607e6ff539cbf12156bfd8af232be | ≥ 1351551aa9058e07a20a27a158270cf84fcde621, < 6a27762340ad08643de3bc17fe1646ea489ca2e2 | ≥ c02421992505c95c7f3c9ad59ee35e22eac60988, < 2112c4c47d36bc5aba3ddeb9afedce6ae6a67e7d | ≥ d9ba36c22a7bb09d6bac4cc2f243eff05da53f43, < 55410a9144c76ecda126e6cdec556dfcd8f343b2 | ≥ ac6725a634f7e8c0330610a8527f20c730b61115, < 116b9c002c894097adc2b8684db2d1da4229ed46 | ≥ 348d446762e7c70778df8bafbdf3fa0df2123f58, < fd269a0435f8e9943b7a57c5a59688848d42d449 | ≥ a2a9339e1c9deb7e1e079e12e27a0265aea8421a, < 5134556c9be582793f30695c09d18a26fe1ff2d7 | ≥ a2a9339e1c9deb7e1e079e12e27a0265aea8421a, < 25e97f7b1866e6b8503be349eeea44bb52d661ce | d82a439c3cfdb28aa7e82e2e849c5c4dd9fca284 | ≥ 4.14.313, < 4.14.316 | ≥ 4.19.281, < 4.19.284 | ≥ 5.4.241, < 5.4.244 | ≥ 5.10.178, < 5.10.181 | ≥ 5.15.108, < 5.15.113 | ≥ 6.1.25, < 6.1.30 | ≥ 6.2.12, < 6.3 | 6.3
  • linux_kernel< 4.14.316 | ≥ 4.15, < 4.19.284 | ≥ 4.20, < 5.4.244 | ≥ 5.5, < 5.10.181 | ≥ 5.11, < 5.15.113 | ≥ 5.16, < 6.1.30 | ≥ 6.2, < 6.3.4
Debian1 product
  • linux< 6.1.37-1 | < 6.3.7-1

3 vendors · 122 products

References

12 links
Show all 12 references