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Fencer Vulns
medium 6.5

CVE-2023-2804 json

A heap-based buffer overflow issue was discovered in libjpeg-turbo in h2v2_merged_upsample_internal() function of jdmrgext.c file.

published 2023-05-25 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-34257

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits
0
none known

Summary

A heap-based buffer overflow issue was discovered in libjpeg-turbo in h2v2_merged_upsample_internal() function of jdmrgext.c file. The vulnerability can only be exploited with 12-bit data precision for which the range of the sample data type exceeds the valid sample range, hence, an attacker could craft a 12-bit lossless JPEG image that contains out-of-range 12-bit samples. An application attempting to decompress such image using merged upsampling would lead to segmentation fault or buffer overflows, causing an application to crash.

Patch / fix

  • libjpeg-turbo openSUSE Tumbleweed 8.3.2-77.1

opensuse advisories openSUSE-SU-2024:13552-1

  • libjpeg-turbo Alpine 3.18 2.1.5.1-r3
  • libjpeg-turbo Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 2.1.5.1-r4

alpine advisories ALPINE-CVE-2023-2804

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-2023-2804 updated cvss 6.5

libjpeg-turbo: heap-buffer-overflow in h2v2_merged_upsample_internal() at /libjpeg-turbo/jdmrgext.c

  • Red Hat Enterprise Linux 6 libjpeg-turbo Red Hat Enterprise Linux 7 turbojpeg, libjpeg-turbo, libjpeg-turbo-utils Red Hat Enterprise Linux 8 turbojpeg, libjpeg-turbo, libjpeg-turbo-utils Red Hat Enterprise Linux 9 turbojpeg, libjpeg-turbo, libjpeg-turbo-utils
    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
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

1.20% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/libjpeg-turbo/libjpeg-turbo/issues/675 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/libjpeg-turbo/libjpeg-turbo/issues/668#issuecomment-1492586118 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • n/a libjpeg-turbo

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.