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Fencer Vulns
high 8.1

CVE-2025-26519 json

musl libc 0.9.13 through 1.2.5 before 1.2.6 has an out-of-bounds write vulnerability when an attacker can trigger iconv conversion of untru…

published 2025-02-14 20 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-4206

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

musl libc 0.9.13 through 1.2.5 before 1.2.6 has an out-of-bounds write vulnerability when an attacker can trigger iconv conversion of untrusted EUC-KR text to UTF-8.

Patch / fix

  • musl-libc musl 1.2.6
  • musl Debian 14, Debian 13 1.2.5-2

debian advisories DEBIAN-CVE-2025-26519

  • musl Alpine 3.16 1.2.3-r4
  • musl Alpine 3.17 1.2.3-r6
  • musl Alpine 3.18 1.2.4-r3
  • musl Alpine 3.19 1.2.4_git20230717-r5
  • musl Alpine 3.20 1.2.5-r1
  • musl Alpine 3.21 1.2.5-r9
  • musl Alpine 3.24, Alpine 3.23, Alpine 3.22 1.2.5-r10

alpine advisories ALPINE-CVE-2025-26519

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-26519 updated cvss 8.1

musl-libc: input-controlled out-of-bounds write primitive in iconv()

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
20 mo ago

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
NVD 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • musl-libc musl

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.