9.1

CVE-2026-43117: linux NULL Pointer Dereference

CVSS: 9.1v3.1CriticalModified
AliasesUBUNTU-CVE-2026-43117DEBIAN-CVE-2026-43117CGA-42w5-q4hx-cccw
Published 06-05-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-43117 is a critical (CVSS 9.1) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.3% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.46%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 32 · Related 44
OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1SUSE-SU-2026:23221-1

Timeline

  1. 06-05-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file() If overlay is used on top of btrfs, dentry->d_sb translates to overlay's super block and fsid assignment will lead to a crash. Use file_inode(file)->i_sb to always get btrfs_sb.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

+0.06 pp

From 0.40% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.46%

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

Ubuntu156 products
  • linuxAll versions (No fix recorded) | < 5.4.0-233.253 | < 5.15.0-185.195 | < 6.8.0-134.134 | < 6.17.0-40.40
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1161.172 | < 5.15.0-1111.118 | < 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)
Chainguard6 products
  • linux-aws-6.18< 6.18.31-r0
  • linux-azure-6.18< 6.18.24-r1
  • linux-gcp-6.18< 6.18.31-r0
  • linux-qemu-6.18< 6.18.31-r0
  • linux-qemu-6.18-bootc-boot-installed< 6.18.31-r0
Linux2 products
  • linux≥ bc074524e123ded281cde25ebc5661910f9679e3, < 4a7bab35fad5251c8cb738161152578cd83b6b9c | ≥ bc074524e123ded281cde25ebc5661910f9679e3, < 520e8b4bcf872a534a7bf61ccf880047642df296 | ≥ bc074524e123ded281cde25ebc5661910f9679e3, < e252db8ca2a01f82d472091f35d549b313278636 | ≥ bc074524e123ded281cde25ebc5661910f9679e3, < c09a7446aab5773f38d6abb25fce99b8e1dfbc97 | ≥ bc074524e123ded281cde25ebc5661910f9679e3, < 32372781d664a9b03c40343e96c29d0a6139f97d | ≥ bc074524e123ded281cde25ebc5661910f9679e3, < 2e4adfaec97ee053ad1bdfb5036845e66f7e0d8a | ≥ bc074524e123ded281cde25ebc5661910f9679e3, < d110d7cdb045715c0b45b0dfd974525bb38f653d | ≥ bc074524e123ded281cde25ebc5661910f9679e3, < a85b46db143fda5869e7d8df8f258ccef5fa1719 | 4.8
  • linux_kernel≥ 4.8, < 6.6.136 | ≥ 6.7, < 6.12.83 | ≥ 6.13, < 6.18.24 | ≥ 6.19, < 6.19.14 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5
Debian1 product
  • linux< 6.1.176-1 | < 6.12.85-1 | < 6.19.14-1

4 vendors · 165 products

References

46 links
Show all 46 references