7.8

CVE-2022-49053: scsi: target: tcmu: Fix possible page UAF

Analyzed
AliasesUBUNTU-CVE-2022-49053DEBIAN-CVE-2022-49053
Published 26-02-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-49053 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 21.7% 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 · +0.01 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 27 · Related 27
SUSE-SU-2025:03124-1SUSE-SU-2025:03126-1SUSE-SU-2025:03129-1SUSE-SU-2025:03130-1SUSE-SU-2025:03133-1SUSE-SU-2025:03135-1

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: scsi: target: tcmu: Fix possible page UAF tcmu_try_get_data_page() looks up pages under cmdr_lock, but it does not take refcount properly and just returns page pointer. When tcmu_try_get_data_page() returns, the returned page may have been freed by tcmu_blocks_release(). We need to get_page() under cmdr_lock to avoid concurrent tcmu_blocks_release().

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

22%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.28% 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.

Ubuntu105 products
  • linux< 4.15.0-189.200 | < 5.4.0-122.138 | < 5.15.0-37.39
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.15.0-1137.148 | < 5.4.0-1081.88 | < 5.15.0-1011.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 141685a39151aea95eb56562d2953e919c6c73da, < d7c5d79e50be6e06b669141e3db1f977a0dd4e8e | ≥ 141685a39151aea95eb56562d2953e919c6c73da, < e3e0e067d5b34e4a68e3cc55f8eebc413f56f8ed | ≥ 141685a39151aea95eb56562d2953e919c6c73da, < fb7a5115422fbd6a4d505e8844f1ef5529f10489 | ≥ 141685a39151aea95eb56562d2953e919c6c73da, < aec36b98a1bbaa84bfd8299a306e4c12314af626 | ≥ 141685a39151aea95eb56562d2953e919c6c73da, < b7f3b5d70c834f49f7d87a2f2ed1c6284d9a0322 | ≥ 141685a39151aea95eb56562d2953e919c6c73da, < a9564d84ed9f6ee71017d062d0d2182154294a4b | ≥ 141685a39151aea95eb56562d2953e919c6c73da, < a6968f7a367f128d120447360734344d5a3d5336 | 4.12
  • linux_kernel< 4.14.276 | ≥ 4.15, < 4.19.239 | ≥ 4.20, < 5.4.190 | ≥ 5.5, < 5.10.112 | ≥ 5.11, < 5.15.35 | ≥ 5.16, < 5.17.4 | 5.18:rc1
Debian1 product
  • linux< 5.17.6-1

3 vendors · 108 products

References

11 links
Show all 11 references