5.5

CVE-2022-49304: drivers: tty: serial: Fix deadlock in sa1100_set_termios()

Modified
AliasesUBUNTU-CVE-2022-49304DEBIAN-CVE-2022-49304
Published 26-02-2025Last modified 11-05-2026

Vulnerability summary

CVE-2022-49304 is a medium (CVSS 5.5) Improper Locking vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 10.3% 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
0.20%
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 6 · Related 6
SUSE-SU-2025:1027-1SUSE-SU-2025:1176-1SUSE-SU-2025:1183-1SUSE-SU-2025:1194-1SUSE-SU-2025:1241-1SUSE-SU-2025:1263-1

Timeline

  1. 26-02-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: drivers: tty: serial: Fix deadlock in sa1100_set_termios() There is a deadlock in sa1100_set_termios(), which is shown below: (Thread 1) | (Thread 2) | sa1100_enable_ms() sa1100_set_termios() | mod_timer() spin_lock_irqsave() //(1) | (wait a time) ... | sa1100_timeout() del_timer_sync() | spin_lock_irqsave() //(2) (wait timer to stop) | ... We hold sport->port.lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need sport->port.lock in position (2) of thread 2. As a result, sa1100_set_termios() will block forever. This patch moves del_timer_sync() before spin_lock_irqsave() in order to prevent the deadlock.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

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.

Ubuntu112 products
  • linuxAll versions (No fix recorded) | < 4.15.0-192.203 | < 5.4.0-126.142 | < 5.15.0-48.54
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1140.151 | < 5.4.0-1085.92 | < 5.15.0-1020.24
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0976808d0d171ec837d4bd3e9f4ad4a00ab703b8 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 85e20f8bd31a46d8c60103d0274a8ebe8f47f2b2 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 920f0ae7a129ffee98a106e3bbdfd61a2a59e939 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 09a5958a2452ad22d0cb638711ef34ea1863a829 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6e2273eefab54a521d9c59efb6e1114e742bdf41 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2cbfc38df580bff5b2fe19f21c1a7520efcc4b3b | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 553213432ef0c295becdc08c0207d2094468f673 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 34d91e555e5582cffdbcbb75517bc9217866823e | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 62b2caef400c1738b6d22f636c628d9f85cd4c4c | 2.6.12
  • linux_kernel< 4.9.318 | ≥ 4.10, < 4.14.283 | ≥ 4.15, < 4.19.247 | ≥ 4.20, < 5.4.198 | ≥ 5.5, < 5.10.122 | ≥ 5.11, < 5.15.47 | ≥ 5.16, < 5.17.15 | ≥ 5.18, < 5.18.4
Debian1 product
  • linux< 5.18.5-1

3 vendors · 115 products

References

13 links
Show all 13 references