5.5

CVE-2022-50374: Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure

Modified
AliasesUBUNTU-CVE-2022-50374DEBIAN-CVE-2022-50374
Published 17-09-2025Last modified 23-05-2026

Vulnerability summary

CVE-2022-50374 is a medium (CVSS 5.5) Use of Uninitialized Resource vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.21%
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 5 · Related 4
RHSA-2024:2394SUSE-SU-2025:03615-1SUSE-SU-2025:03628-1SUSE-SU-2025:3716-1SUSE-SU-2025:3761-1

Timeline

  1. 17-09-2025
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure syzbot is reporting NULL pointer dereference at hci_uart_tty_close() [1], for rcu_sync_enter() is called without rcu_sync_init() due to hci_uart_tty_open() ignoring percpu_init_rwsem() failure. While we are at it, fix that hci_uart_register_device() ignores percpu_init_rwsem() failure and hci_uart_unregister_device() does not call percpu_free_rwsem().

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.20% 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: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu118 products
  • linuxAll versions (No fix recorded) | < 5.15.0-60.66
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1030.34
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2, < d7cc0d51ffcbfd1caaa809fcf9cff05c46d0fb4d | ≥ 67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2, < b8917dce2134739b39bc0a5648b18427f2cad569 | ≥ 67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2, < 75b2c71ea581c7bb1303860d89366a42ad0506d2 | ≥ 67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2, < 98ce10f3f345e61fc6c83bff9cd11cda252b05ac | ≥ 67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2, < 3124d320c22f3f4388d9ac5c8f37eaad0cefd6b1 | f6ec33f6bd3723a8146768106434ef6ab3d9d990 | 4a53c4e84ace1bc75157a7281af3fe8f5b19d08c | ≥ 4.14.63, < 4.15 | 4.15
  • linux_kernel≥ 4.14.63, < 4.15 | ≥ 4.14.63, < 5.10.150 | ≥ 5.11, < 5.15.75 | ≥ 5.16, < 5.19.17 | ≥ 6.0, < 6.0.3
Debian1 product
  • linux< 6.0.3-1

3 vendors · 121 products

References

9 links