9.8

CVE-2026-31436: linux NULL Pointer Dereference

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2026-31436DEBIAN-CVE-2026-31436
Published 22-04-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-31436 is a critical (CVSS 9.8) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.67% chance of exploitation in the next 30 days, higher than 51.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.67%
0%100%
Low · +0.21 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 23 · Related 28
LSN-0122-1OPENSUSE-SU-2026:21555-1SUSE-SU-2026:2195-1SUSE-SU-2026:2238-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1

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: dmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc() At the end of this function, d is the traversal cursor of flist, but the code completes found instead. This can lead to issues such as NULL pointer dereferences, double completion, or descriptor leaks. Fix this by completing d instead of found in the final list_for_each_entry_safe() loop.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.67%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

+0.21 pp

From 0.46% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.67%

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

Ubuntu130 products
  • linux< 6.8.0-134.134 | < 6.17.0-40.40
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1060.63 | < 6.17.0-1019.19
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ aa8d18becc0c14aa3eb46d6d1b81450446e11b87, < e21da2ad8844585040fe4b82be1ad2fe99d40074 | ≥ aa8d18becc0c14aa3eb46d6d1b81450446e11b87, < 82656e8daf8de00935ae91b91bed43f4d6e0d644 | ≥ aa8d18becc0c14aa3eb46d6d1b81450446e11b87, < 0e4f43779d550e559be13a5cdb763bad92c4cc99 | ≥ aa8d18becc0c14aa3eb46d6d1b81450446e11b87, < e1c9866173c5f8521f2d0768547a01508cb9ff27 | 6.8
  • linux_kernel≥ 6.8, < 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 | 7.0:rc6
Debian1 product
  • linux< 6.12.85-1 | < 6.19.11-1

3 vendors · 133 products

References

28 links
Show all 28 references