8.8

CVE-2026-52918: Bluetooth: serialize accept_q access

Modified
AliasesUBUNTU-CVE-2026-52918DEBIAN-CVE-2026-52918
Published 24-06-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-52918 is a high (CVSS 8.8) vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.3% 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 · -0.04 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 52 · Related 48
OPENSUSE-SU-2026:21555-1RHSA-2026:65334RHSA-2026:67150RHSA-2026:70402RHSA-2026:70403SUSE-SU-2026:22521-1

Timeline

  1. 24-06-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: serialize accept_q access bt_sock_poll() walks the accept queue without synchronization, while child teardown can unlink the same socket and drop its last reference. The unsynchronized accept queue walk has existed since the initial Bluetooth import. Protect accept_q with a dedicated lock for queue updates and polling. Also rework bt_accept_dequeue() to take temporary child references under the queue lock before dropping it and locking the child socket.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

Decrease -0.04 pp

From 0.26% 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

Affected systems

Version check

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

Ubuntu167 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-139.139 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1064.67 | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d9ce4de05df2385c19e2c7d12f529144e1a44af1 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 41c8c1c7923e86e0eb59cfb4279349112756a336 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 4ec17782fd186f901a7329605d11048b085b945a | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < be43e6b4043113c3b3cf887c3c8350f67140274c | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 85f8674cae82053f1e6bab295f6a8422cca14db5 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 8b4c412e001b0c670eb937beab491af974da55b3 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a218bf69eb51fefe59a3976fa8925261141f681c | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < e83f5e24da741fa9405aeeff00b08c5ee7c37b88 | 2.6.12
  • linux_kernel≥ 2.6.12.1, < 5.10.259 | ≥ 5.11, < 5.15.210 | ≥ 5.16, < 6.1.176 | ≥ 6.2, < 6.6.142 | ≥ 6.7, < 6.12.92 | ≥ 6.13, < 6.18.34 | ≥ 6.19, < 7.0.11 | 2.6.12 | 2.6.12:rc2 | 2.6.12:rc3 | 2.6.12:rc4 | 2.6.12:rc5 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.12-1

3 vendors · 170 products

References

43 links
Show all 43 references