8.8

CVE-2023-53827: Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp}

Deferred
AliasesUBUNTU-CVE-2023-53827DEBIAN-CVE-2023-53827
Published 09-12-2025Last modified 15-10-2026

Vulnerability summary

CVE-2023-53827 is a high (CVSS 8.8) vulnerability in linux. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 33.2% 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
0.39%
0%100%
Low · 0.00 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 9 · Related 7
RHSA-2026:3360RHSA-2026:3388SUSE-SU-2026:0263-1SUSE-SU-2026:0317-1SUSE-SU-2026:0411-1SUSE-SU-2026:0617-1

Timeline

  1. 09-12-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp} Similar to commit d0be8347c623 ("Bluetooth: L2CAP: Fix use-after-free caused by l2cap_chan_put"), just use l2cap_chan_hold_unless_zero to prevent referencing a channel that is about to be destroyed.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.39% 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.

Ubuntu124 products
  • linuxAll versions (No fix recorded) | < 5.4.0-156.173 | < 5.15.0-79.86
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1107.115 | < 5.15.0-1042.47
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.25-1
Linux1 product
  • linux≥ 61d6ef3e3408cdf7e622646fb90a9f7f9560b943, < f2d38e77aa5f3effc143e7dd24da8acf02925958 | ≥ 61d6ef3e3408cdf7e622646fb90a9f7f9560b943, < 1351551aa9058e07a20a27a158270cf84fcde621 | ≥ 61d6ef3e3408cdf7e622646fb90a9f7f9560b943, < c02421992505c95c7f3c9ad59ee35e22eac60988 | ≥ 61d6ef3e3408cdf7e622646fb90a9f7f9560b943, < d9ba36c22a7bb09d6bac4cc2f243eff05da53f43 | ≥ 61d6ef3e3408cdf7e622646fb90a9f7f9560b943, < ac6725a634f7e8c0330610a8527f20c730b61115 | ≥ 61d6ef3e3408cdf7e622646fb90a9f7f9560b943, < 348d446762e7c70778df8bafbdf3fa0df2123f58 | ≥ 61d6ef3e3408cdf7e622646fb90a9f7f9560b943, < d82a439c3cfdb28aa7e82e2e849c5c4dd9fca284 | ≥ 61d6ef3e3408cdf7e622646fb90a9f7f9560b943, < a2a9339e1c9deb7e1e079e12e27a0265aea8421a | 3.5

3 vendors · 126 products

References

12 links
Show all 12 references