7.8

CVE-2022-50496: dm cache: Fix UAF in destroy()

Analyzed
AliasesUBUNTU-CVE-2022-50496DEBIAN-CVE-2022-50496
Published 04-10-2025Last modified 11-05-2026

Vulnerability summary

CVE-2022-50496 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.17%
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 9 · Related 7
RHSA-2023:2458RHSA-2023:2951SUSE-SU-2025:4111-1SUSE-SU-2025:4135-1SUSE-SU-2025:4139-1SUSE-SU-2025:4149-1

Timeline

  1. 04-10-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: dm cache: Fix UAF in destroy() Dm_cache also has the same UAF problem when dm_resume() and dm_destroy() are concurrent. Therefore, cancelling timer again in destroy().

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.17% 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.

Ubuntu120 products
  • linuxAll versions (No fix recorded) | < 4.15.0-208.220 | < 5.4.0-144.161 | < 5.15.0-69.76
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1153.166 | < 5.4.0-1097.105 | < 5.15.0-1033.37
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ c6b4fcbad044e6fffcc75bba160e720eb8d67d17, < 034cbc8d3b47a56acd89453c29632a9c117de09d | ≥ c6b4fcbad044e6fffcc75bba160e720eb8d67d17, < 993406104d2b28fe470126a062ad37a1e21e792e | ≥ c6b4fcbad044e6fffcc75bba160e720eb8d67d17, < 4d20032dd90664de09f2902a7ea49ae2f7771746 | ≥ c6b4fcbad044e6fffcc75bba160e720eb8d67d17, < 2f097dfac7579fd84ff98eb1d3acd41d53a485f3 | ≥ c6b4fcbad044e6fffcc75bba160e720eb8d67d17, < 2b17026685a270b2beaf1cdd9857fcedd3505c7e | ≥ c6b4fcbad044e6fffcc75bba160e720eb8d67d17, < d2a0b298ebf83ab6236f66788a3541e91ce75a70 | ≥ c6b4fcbad044e6fffcc75bba160e720eb8d67d17, < 6ac4f36910764cb510bafc4c3768544f86ca48ca | ≥ c6b4fcbad044e6fffcc75bba160e720eb8d67d17, < 6a3e412c2ab131c54945327a7676b006f000a209 | ≥ c6b4fcbad044e6fffcc75bba160e720eb8d67d17, < 6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa | 3.9
  • linux_kernel≥ 3.9, < 4.9.337 | ≥ 4.10, < 4.14.303 | ≥ 4.15, < 4.19.270 | ≥ 4.20, < 5.4.229 | ≥ 5.5, < 5.10.163 | ≥ 5.11, < 5.15.87 | ≥ 5.16, < 6.0.18 | ≥ 6.1, < 6.1.4
Debian1 product
  • linux< 6.1.4-1

3 vendors · 123 products

References

13 links
Show all 13 references