7.8

CVE-2026-31454: linux Use After Free

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2026-31454DEBIAN-CVE-2026-31454
Published 22-04-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-31454 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% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 41 · Related 38
LSN-0122-1MGASA-2026-0108MGASA-2026-0110OPENSUSE-SU-2026:20965-1SUSE-SU-2026:22099-1SUSE-SU-2026:22108-1

Timeline

  1. 22-04-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: xfs: save ailp before dropping the AIL lock in push callbacks In xfs_inode_item_push() and xfs_qm_dquot_logitem_push(), the AIL lock is dropped to perform buffer IO. Once the cluster buffer no longer protects the log item from reclaim, the log item may be freed by background reclaim or the dquot shrinker. The subsequent spin_lock() call dereferences lip->li_ailp, which is a use-after-free. Fix this by saving the ailp pointer in a local variable while the AIL lock is held and the log item is guaranteed to be valid.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

+0.04 pp

From 0.13% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.17%

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

Ubuntu145 products
  • linux< 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1061.64 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 90c60e16401248a4900f3f9387f563d0178dcf34, < edd1637d4e3911ab6c760f553f2040fe72f61a13 | ≥ 90c60e16401248a4900f3f9387f563d0178dcf34, < 19437e4f7bb909afde832b39372aa2f3ce3cfd88 | ≥ 90c60e16401248a4900f3f9387f563d0178dcf34, < 6dbe17f19c290a72ce57d5abc70e1fad0c3e14e5 | ≥ 90c60e16401248a4900f3f9387f563d0178dcf34, < 75669e987137f49c99ca44406bf0200d1892dd16 | ≥ 90c60e16401248a4900f3f9387f563d0178dcf34, < d8fc60bbaf5aea1604bf9f4ed565da6a1ac7a87d | ≥ 90c60e16401248a4900f3f9387f563d0178dcf34, < 50f5f056807b7bed74f4f307f2ca0ed92f3e556d | ≥ 90c60e16401248a4900f3f9387f563d0178dcf34, < 4c7d50147316cf049462f327c4a3e9dc2b7f1dd0 | ≥ 90c60e16401248a4900f3f9387f563d0178dcf34, < 394d70b86fae9fe865e7e6d9540b7696f73aa9b6 | 5.9
  • linux_kernel≥ 5.9, < 5.10.253 | ≥ 5.11, < 5.15.203 | ≥ 5.16, < 6.1.168 | ≥ 6.2, < 6.6.131 | ≥ 6.7, < 6.12.80 | ≥ 6.13, < 6.18.21 | ≥ 6.19, < 6.19.11 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.11-1

3 vendors · 148 products

References

40 links
Show all 40 references