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NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.20% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 0976808d0d171ec837d4bd3e9f4ad4a00ab703b8, 09a5958a2452ad22d0cb638711ef34ea1863a829, 2cbfc38df580bff5b2fe19f21c1a7520efcc4b3b.

Low priority for now. Upgrade to Linux Linux 0976808d0d171ec837d4bd3e9f4ad4a00ab703b8, 09a5958a2452ad22d0cb638711ef34ea1863a829, 2cbfc38df580bff5b2fe19f21c1a7520efcc4b3b or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 26, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 10th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernelbefore 4.9.318
  • linux linux kernel4.10 and later · before 4.14.283
  • linux linux kernel4.15 and later · before 4.19.247
  • linux linux kernel4.20 and later · before 5.4.198
  • linux linux kernel5.5 and later · before 5.10.122
  • linux linux kernel5.11 and later · before 5.15.47
  • linux linux kernel5.16 and later · before 5.17.15
  • linux linux kernel5.18 and later · before 5.18.4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 0976808d0d171ec837d4bd3e9f4ad4a00ab703b8affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 85e20f8bd31a46d8c60103d0274a8ebe8f47f2b2affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 920f0ae7a129ffee98a106e3bbdfd61a2a59e939affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 09a5958a2452ad22d0cb638711ef34ea1863a829affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 6e2273eefab54a521d9c59efb6e1114e742bdf41affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 2cbfc38df580bff5b2fe19f21c1a7520efcc4b3baffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 553213432ef0c295becdc08c0207d2094468f673affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 34d91e555e5582cffdbcbb75517bc9217866823eaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 62b2caef400c1738b6d22f636c628d9f85cd4c4caffected · git

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.18.5-15.18.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-49302Feb 26, 2025 · USB: host: isp116x: check return value after calling platform_get_resource()
    22Monitor
  • ← EarlierCVE-2022-49303Feb 26, 2025 · drivers: staging: rtl8192eu: Fix deadlock in rtw_joinbss_event_prehandle
    22Monitor
  • Later →CVE-2022-49305Feb 26, 2025 · drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux0976808d0d171ec837d4bd3e9f4ad4a00ab703b8Vendor (CNA)
Linux Linux09a5958a2452ad22d0cb638711ef34ea1863a829Vendor (CNA)
Linux Linux2cbfc38df580bff5b2fe19f21c1a7520efcc4b3bVendor (CNA)
Linux Linux34d91e555e5582cffdbcbb75517bc9217866823eVendor (CNA)
Linux Linux553213432ef0c295becdc08c0207d2094468f673Vendor (CNA)
Linux Linux62b2caef400c1738b6d22f636c628d9f85cd4c4cVendor (CNA)
Linux Linux6e2273eefab54a521d9c59efb6e1114e742bdf41Vendor (CNA)
Linux Linux85e20f8bd31a46d8c60103d0274a8ebe8f47f2b2Vendor (CNA)
Linux Linux920f0ae7a129ffee98a106e3bbdfd61a2a59e939Vendor (CNA)
debian:linux5.18.5-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-667 · Improper Locking

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records