5.5

CVE-2026-45848: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-45848DEBIAN-CVE-2026-45848
Published 27-05-2026Last modified 27-05-2026
Open JSON

Vulnerability summary

CVE-2026-45848 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.16%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 36 · Related 36
OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22521-1SUSE-SU-2026:22522-1SUSE-SU-2026:22665-1SUSE-SU-2026:22666-1SUSE-SU-2026:22742-1

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.

Description

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix NULL sock in aa_sock_file_perm Deal with the potential that sock and sock-sk can be NULL during socket setup or teardown. This could lead to an oops. The fix for NULL pointer dereference in __unix_needs_revalidation shows this is at least possible for af_unix sockets. While the fix for af_unix sockets applies for newer mediation this is still the fall back path for older af_unix mediation and other sockets, so ensure it is covered.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

0.00 pp

From 0.16% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.16%

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

Ubuntu153 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-134.134
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1060.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 56974a6fcfef69ee0825bd66ed13e92070ac5224, < 68538ec34fcb4194c7961dc4eca6f5537fec8067 | ≥ 56974a6fcfef69ee0825bd66ed13e92070ac5224, < 5121b7283f1c46e4c06b88b1dda7b064429d77de | ≥ 56974a6fcfef69ee0825bd66ed13e92070ac5224, < c11b7c3280d000376e27ebfed17ec7046699eab4 | ≥ 56974a6fcfef69ee0825bd66ed13e92070ac5224, < 0dc19bca22606f7a61d5988408f74e3ae0ef3486 | ≥ 56974a6fcfef69ee0825bd66ed13e92070ac5224, < 3852eb9a0392eb435c03dcb47d581bcfe6a9a95b | ≥ 56974a6fcfef69ee0825bd66ed13e92070ac5224, < ccb66a3c6c8f51b3ed1bc003b70bb9ff99e8d835 | ≥ 56974a6fcfef69ee0825bd66ed13e92070ac5224, < 8a0ededbfcff74598f82f1d4b8ef9db28878b317 | ≥ 56974a6fcfef69ee0825bd66ed13e92070ac5224, < 00b67657535dfea56e84d11492f5c0f61d0af297 | 4.17
  • linux_kernel≥ 4.17, < 5.10.252 | ≥ 5.11, < 5.15.202 | ≥ 5.16, < 6.1.165 | ≥ 6.2, < 6.6.128 | ≥ 6.7, < 6.12.75 | ≥ 6.13, < 6.18.14 | ≥ 6.19, < 6.19.4
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.18.14-1

3 vendors · 156 products

References

37 links
Show all 37 references