5.5

CVE-2026-32249: vim NULL Pointer Dereference

CVSS: 5.5v3.1MediumAnalyzed
AliasesALPINE-CVE-2026-32249MGASA-2026-0055UBUNTU-CVE-2026-32249
Published 12-03-2026Last modified 13-03-2026
Open JSON

Vulnerability summary

CVE-2026-32249 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in vim. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.4% 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
0.19%
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 0 · Related 1
USN-8171-1

Timeline

  1. 12-03-2026
    PublishedVulnerability first disclosed.
  2. 13-03-2026
    Last modifiedVulnerability information updated.

Description

Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim's NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state->out1->out without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

+0.06 pp

From 0.13% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.19%

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

Alpine1 product
  • vim≥ 9.1.0011, < 9.2.0140-r0
Debian1 product
  • vimAll versions (No fix recorded) | < 2:9.2.0218-1
Mageia1 product
  • vim< 9.2.140-1.mga9
Ubuntu1 product
  • vim< 2:9.1.0016-1ubuntu7.11 | < 2:9.1.0967-1ubuntu6.2
Vim1 product
  • vim≥ 9.1.0011, < 9.2.0137

5 vendors · 5 products

References

12 links
Show all 12 references