CVE-2022-49304
drivers: tty: serial: Fix deadlock in sa1100_set_termios()
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Timeline
ID reserved
By Linux
Published
- 15 months later
· 15 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.20% · top 90% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 0976808d0d171ec837d4bd3e9f4ad4a00ab703b8
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 85e20f8bd31a46d8c60103d0274a8ebe8f47f2b2
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 920f0ae7a129ffee98a106e3bbdfd61a2a59e939
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 09a5958a2452ad22d0cb638711ef34ea1863a829
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 6e2273eefab54a521d9c59efb6e1114e742bdf41
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 2cbfc38df580bff5b2fe19f21c1a7520efcc4b3b
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 553213432ef0c295becdc08c0207d2094468f673
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 34d91e555e5582cffdbcbb75517bc9217866823e
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 62b2caef400c1738b6d22f636c628d9f85cd4c4c
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 4.9.318 – ≤ 4.9.*
- unaffected 4.14.283 – ≤ 4.14.*
- unaffected 4.19.247 – ≤ 4.19.*
- unaffected 5.4.198 – ≤ 5.4.*
- unaffected 5.10.122 – ≤ 5.10.*
- unaffected 5.15.47 – ≤ 5.15.*
- unaffected 5.17.15 – ≤ 5.17.*
- unaffected 5.18.4 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (9)
- https://git.kernel.org/stable/c/0976808d0d171ec837d4bd3e9f4ad4a00ab703b8 (opens in a new tab)
- https://git.kernel.org/stable/c/85e20f8bd31a46d8c60103d0274a8ebe8f47f2b2 (opens in a new tab)
- https://git.kernel.org/stable/c/920f0ae7a129ffee98a106e3bbdfd61a2a59e939 (opens in a new tab)
- https://git.kernel.org/stable/c/09a5958a2452ad22d0cb638711ef34ea1863a829 (opens in a new tab)
- https://git.kernel.org/stable/c/6e2273eefab54a521d9c59efb6e1114e742bdf41 (opens in a new tab)
- https://git.kernel.org/stable/c/2cbfc38df580bff5b2fe19f21c1a7520efcc4b3b (opens in a new tab)
- https://git.kernel.org/stable/c/553213432ef0c295becdc08c0207d2094468f673 (opens in a new tab)
- https://git.kernel.org/stable/c/34d91e555e5582cffdbcbb75517bc9217866823e (opens in a new tab)
- https://git.kernel.org/stable/c/62b2caef400c1738b6d22f636c628d9f85cd4c4c (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2022-49304)Record last updated .