5.5

CVE-2026-45915: linux

CVSS: 5.5v3.1MediumUndergoing analysis
AliasesUBUNTU-CVE-2026-45915DEBIAN-CVE-2026-45915
Published 27-05-2026Last modified 27-05-2026
Open JSON

Vulnerability summary

CVE-2026-45915 is a medium (CVSS 5.5) 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 38 · Related 38
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. 27-05-2026
    PublishedVulnerability first disclosed.

Description

In the Linux kernel, the following vulnerability has been resolved: fat: avoid parent link count underflow in rmdir Corrupted FAT images can leave a directory inode with an incorrect i_nlink (e.g. 2 even though subdirectories exist). rmdir then unconditionally calls drop_nlink(dir) and can drive i_nlink to 0, triggering the WARN_ON in drop_nlink(). Add a sanity check in vfat_rmdir() and msdos_rmdir(): only drop the parent link count when it is at least 3, otherwise report a filesystem error.

CVSS metrics

3 scores · 3 sources · 1 version

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

No weakness data has been published for this record.

Affected systems

Ubuntu157 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≥ 9a53c3a783c2fa9b969628e65695c11c3e51e673, < 7fe0de287e931e07cb96ecf1f449b2ebdb0e1115 | ≥ 9a53c3a783c2fa9b969628e65695c11c3e51e673, < 9894c79fd9466612d0514be157b5c30cd93aa645 | ≥ 9a53c3a783c2fa9b969628e65695c11c3e51e673, < cd569b87378b9c33ae13c23d6bb9d205d66f7c4b | ≥ 9a53c3a783c2fa9b969628e65695c11c3e51e673, < d3b7ffa90f613938128432c7b2f35b7aa4bdd86b | ≥ 9a53c3a783c2fa9b969628e65695c11c3e51e673, < 955c5d670b5ae07c78f4345e23a895638db96ce1 | ≥ 9a53c3a783c2fa9b969628e65695c11c3e51e673, < 17866f8a0822d414cb02e621cf003a7d04396ef8 | ≥ 9a53c3a783c2fa9b969628e65695c11c3e51e673, < d0bb592fa9def2bace90ac8926c0a1d6fa8c1aa0 | ≥ 9a53c3a783c2fa9b969628e65695c11c3e51e673, < 8cafcb881364af5ef3a8b9fed4db254054033d8a | 2.6.19
  • linux_kernel≥ 2.6.19, < 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 · 160 products

References

37 links
Show all 37 references