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Fencer Intel
high 8.8

CVE-2018-14550 json

Out-of-bounds write in libpng

published 2019-07-10 7 y ago modified 2026-06-17 4 mo ago also GHSA-qwwr-qc2p-6283 , EUVD-2021-0701

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.5%
EPSS 3.5% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

An issue has been found in third-party PNM decoding associated with libpng 1.6.35. It is a stack-based buffer overflow in the function get_token in pnm2png.c in pnm2png.

Patch / fix

  • nuget libpng 1.6.37
  • libpng1.6 Debian 14, Debian 13, Debian 12 1.6.37-1

debian advisories DEBIAN-CVE-2018-14550

  • libpng Alpine 3.24, Alpine 3.23, Alpine 3.22 +16 more 1.6.37-r0

alpine advisories ALPINE-CVE-2018-14550

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-2018-14550 updated cvss 7.0

libpng: Stack-based buffer overflow in contrib/pngminus/pnm2png.c:get_token() potentially leading to arbitrary code execution

  • Red Hat Enterprise Linux 5 libpng Red Hat Enterprise Linux 6 libpng Red Hat Enterprise Linux 7 libpng, libpng12 Red Hat Enterprise Linux 8 libpng, libpng12 Red Hat Virtualization 4 libpng
    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

Exploit prediction

3.54% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/glennrp/libpng/issues/246 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/fouzhe/security/tree/master/libpng#stack-buffer-overflow-in-png2pnm-in-function-get_token referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
GitHub 3.0 8.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
nuget libpng
<1.6.37
1.6.37

Classification

Weakness

References

Sources

Fencer Intel 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.