7.8

CVE-2022-49426: iommu/arm-smmu-v3-sva: Fix mm use-after-free

Analyzed
AliasesUBUNTU-CVE-2022-49426DEBIAN-CVE-2022-49426
Published 26-02-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-49426 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 21.3% 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 (CVE.org)
EPSS score
0.29%
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 4
RHSA-2022:7683RHSA-2022:8267SUSE-SU-2025:1027-1SUSE-SU-2025:1176-1SUSE-SU-2025:1183-1SUSE-SU-2025:1241-1

Timeline

  1. 26-02-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu-v3-sva: Fix mm use-after-free We currently call arm64_mm_context_put() without holding a reference to the mm, which can result in use-after-free. Call mmgrab()/mmdrop() to ensure the mm only gets freed after we unpinned the ASID.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.29% 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.

Ubuntu94 products
  • linux< 5.15.0-47.51
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1019.23
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 32784a9562fb0518b12e9797ee2aec52214adf6f, < fc90f13ea0dcd960e5002d204fa55cec4e0db2fa | ≥ 32784a9562fb0518b12e9797ee2aec52214adf6f, < e3cbbdbff8a4db5d053c53fd71be62ccccdb52b0 | ≥ 32784a9562fb0518b12e9797ee2aec52214adf6f, < 9aa215450888cf29af0c479e14a712dc6b0c506c | ≥ 32784a9562fb0518b12e9797ee2aec52214adf6f, < cbd23144f7662b00bcde32a938c4a4057e476d68 | 5.11
  • linux_kernel≥ 5.11, < 5.15.46 | ≥ 5.16, < 5.17.14 | ≥ 5.18, < 5.18.3
Debian1 product
  • linux< 5.18.5-1

3 vendors · 97 products

References

8 links