9.8

CVE-2022-49149: linux Race Condition

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2022-49149DEBIAN-CVE-2022-49149
Published 26-02-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2022-49149 is a critical (CVSS 9.8) Race Condition vulnerability in linux. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 40.3% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.48%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
USN-8919-1USN-8920-1

Timeline

  1. 26-02-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix call timer start racing with call destruction The rxrpc_call struct has a timer used to handle various timed events relating to a call. This timer can get started from the packet input routines that are run in softirq mode with just the RCU read lock held. Unfortunately, because only the RCU read lock is held - and neither ref or other lock is taken - the call can start getting destroyed at the same time a packet comes in addressed to that call. This causes the timer - which was already stopped - to get restarted. Later, the timer dispatch code may then oops if the timer got deallocated first. Fix this by trying to take a ref on the rxrpc_call struct and, if successful, passing that ref along to the timer. If the timer was already running, the ref is discarded. The timer completion routine can then pass the ref along to the call's work item when it queues it. If the timer or work item where already queued/running, the extra ref is discarded.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

+0.01 pp

From 0.47% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.48%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu106 products
  • linuxAll versions (No fix recorded) | < 5.4.0-242.262 | < 5.15.0-37.39
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1165.176 | < 5.15.0-1011.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ a158bdd3247b9656df36ba133235fff702e9fdc3, < 051360e51341cd17738d82c15a8226010c7cb7f6 | ≥ a158bdd3247b9656df36ba133235fff702e9fdc3, < 8cbf4ae7a2833767d63114573e5f9a45740cc975 | ≥ a158bdd3247b9656df36ba133235fff702e9fdc3, < 54df5a37f1d951ed27fd47bf9b15a42279582110 | ≥ a158bdd3247b9656df36ba133235fff702e9fdc3, < 5e3c11144e557a9dbf9a2f6abe444689ef9d8aae | ≥ a158bdd3247b9656df36ba133235fff702e9fdc3, < 4a7f62f91933c8ae5308f9127fd8ea48188b6bc3 | 4.15
  • linux_kernel≥ 4.15.1, < 5.10.110 | ≥ 5.11, < 5.15.33 | ≥ 5.16, < 5.16.19 | ≥ 5.17, < 5.17.2 | 4.15 | 4.15:rc2 | 4.15:rc3 | 4.15:rc4 | 4.15:rc5 | 4.15:rc6 | 4.15:rc7 | 4.15:rc8 | 4.15:rc9
Debian1 product
  • linux< 5.17.3-1

3 vendors · 109 products

References

11 links
Show all 11 references