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Fencer Vulns
medium 5.5

CVE-2021-26927 json

A flaw was found in jasper before 2.0.25.

published 2021-02-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13709

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

A flaw was found in jasper before 2.0.25. A null pointer dereference in jp2_decode in jp2_dec.c may lead to program crash and denial of service.

Patch / fix

  • jasper_project jasper 2.0.25
  • jasper RHEL 8 2.0.14-5.el8
  • jasper-libs RHEL 8 2.0.14-5.el8

red hat advisories RHSA-2021:4235

  • jasper SLE Real Time 15 SP2, SLE Module for Desktop Applications 15 SP3, SLE Module for Basesystem 15 SP3 +2 more 2.0.14-150000.3.25.1
  • jasper SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 1.900.14-195.31.1

suse advisories SUSE-SU-2022:1479-1SUSE-SU-2022:1475-1

  • jasper openSUSE Tumbleweed 4.0.0-2.1

opensuse advisories openSUSE-SU-2024:13389-1

  • jasper-libs AlmaLinux 8 2.0.14-5.el8

almalinux advisories ALSA-2021:4235

  • jasper Rocky Linux 8 2.0.14-5.el8

rocky linux advisories RLSA-2021:4235

  • jasper CBL-Mariner 2.0 2.0.32-2

azure linux advisories AZL-6492

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • jasper Arch Linux 2.0.25-1

arch linux advisories AVG-1497

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-2021-26927 updated cvss 5.5

jasper: NULL pointer dereference in jp2_decode() in jp2_dec.c

  • Red Hat Enterprise Linux 6 jasper, jasper-libs, jasper-utils Red Hat Enterprise Linux 7 jasper, jasper-libs, jasper-utils
    affected: no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder (v. 8) jasper-devel 2.0.14-5.el8, jasper-debuginfo 2.0.14-5.el8, jasper-debugsource 2.0.14-5.el8, jasper-libs-debuginfo 2.0.14-5.el8, jasper-utils-debuginfo 2.0.14-5.el8 Red Hat Enterprise Linux AppStream (v. 8) jasper 2.0.14-5.el8, jasper-libs 2.0.14-5.el8
    fixed: vendor fix RHSA-2021:4235
  • Red Hat Enterprise Linux 9 jasper, jasper-libs, jasper-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

Exploit prediction

1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/jasper-software/jasper/issues/265 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected products

  • n/a jasper

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.