5.5

CVE-2022-49914: btrfs: fix inode list leak during backref walking at resolve_indirect_refs()

Analyzed
AliasesUBUNTU-CVE-2022-49914DEBIAN-CVE-2022-49914
Published 01-05-2025Last modified 11-05-2026

Vulnerability summary

CVE-2022-49914 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 10.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.20%
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 1 · Related 1
SUSE-SU-2025:01983-1

Timeline

  1. 01-05-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix inode list leak during backref walking at resolve_indirect_refs() During backref walking, at resolve_indirect_refs(), if we get an error we jump to the 'out' label and call ulist_free() on the 'parents' ulist, which frees all the elements in the ulist - however that does not free any inode lists that may be attached to elements, through the 'aux' field of a ulist node, so we end up leaking lists if we have any attached to the unodes. Fix this by calling free_leaf_list() instead of ulist_free() when we exit from resolve_indirect_refs(). The static function free_leaf_list() is moved up for this to be possible and it's slightly simplified by removing unnecessary code.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.20% 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.

Ubuntu112 products
  • linuxAll versions (No fix recorded) | < 4.15.0-206.217 | < 5.4.0-139.156 | < 5.15.0-60.66
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1151.164 | < 5.4.0-1096.104 | < 5.15.0-1030.34
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 3301958b7c1dae8f0f5ded63aa881e0b71e78464, < b1dc9019bb5f89abae85645de1a2dd4830c1f8e9 | ≥ 3301958b7c1dae8f0f5ded63aa881e0b71e78464, < cded2c89774b99b67c98147ae103ea878c92a206 | ≥ 3301958b7c1dae8f0f5ded63aa881e0b71e78464, < 2c0329406bb28109c07c6e23e5e3e0fa618a95d7 | ≥ 3301958b7c1dae8f0f5ded63aa881e0b71e78464, < a52e24c7fcc3c5ce3588a14e3663c00868d36623 | ≥ 3301958b7c1dae8f0f5ded63aa881e0b71e78464, < 6ba3479f9e96b9ad460c7e77abc26dd16e5dec4f | ≥ 3301958b7c1dae8f0f5ded63aa881e0b71e78464, < 396515db923ad5cbeb179d6b88927870b4cbebb7 | ≥ 3301958b7c1dae8f0f5ded63aa881e0b71e78464, < 5614dc3a47e3310fbc77ea3b67eaadd1c6417bf1 | 3.5
  • linux_kernel≥ 3.5, < 4.14.299 | ≥ 4.15, < 4.19.265 | ≥ 4.20, < 5.4.224 | ≥ 5.5, < 5.10.154 | ≥ 5.11, < 5.15.78 | ≥ 5.16, < 6.0.8 | 6.1:rc1 | 6.1:rc2 | 6.1:rc3
Debian1 product
  • linux< 6.0.8-1

3 vendors · 115 products

References

11 links
Show all 11 references