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Fencer Vulns
critical 9.8

CVE-2026-20911 json

A heap-based buffer overflow vulnerability exists in the HuffTable::initval functionality of...

published 2026-04-07 7 mo ago modified 2026-08-03 3 mo ago also EUVD-2026-19622 , GHSA-rc49-6x7v-hf76 , JLSEC-2026-1114

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

A heap-based buffer overflow vulnerability exists in the HuffTable::initval functionality of LibRaw Commit 0b56545 and Commit d20315b. A specially crafted malicious file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

Patch / fix

  • julia LibRaw_jll 0.22.2+0
  • libraw Debian 14 0.22.1-1

debian advisories DEBIAN-CVE-2026-20911

  • libraw SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 0.20.2-150400.3.21.1
  • libraw SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Workstation Extension 15 SP7 +2 more 0.21.1-150600.3.10.1
  • libraw SLE Workstation Extension 15 SP7 0.18.9-150000.3.33.1

suse advisories SUSE-SU-2026:1556-1SUSE-SU-2026:1555-1SUSE-SU-2026:1438-1

  • libraw openSUSE Leap 16.0 0.21.4-160000.3.1
  • libraw openSUSE Tumbleweed 0.22.1-1.1

opensuse advisories openSUSE-SU-2026:20574-1openSUSE-SU-2026:10565-1

  • libraw Alpine 3.24 0.22.1-r0

alpine advisories ALPINE-CVE-2026-20911

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-2026-20911 updated cvss 7.5

LibRaw: LibRaw: Arbitrary Code Execution via specially crafted file

  • Red Hat Enterprise Linux 6 libraw1394 Red Hat Enterprise Linux 7 LibRaw, libraw1394
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 libraw1394
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux 8 LibRaw Red Hat Enterprise Linux 9 LibRaw
    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
yes
Technical impact
total
Assessed
7 mo ago

Exploit prediction

0.64% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • talosintelligence.com https://talosintelligence.com/vulnerability_reports/TALOS-2026-2330 referenced PoC, tagged "exploit" by a source, unverified
  • talosintelligence.com https://www.talosintelligence.com/vulnerability_reports/TALOS-2026-2330 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
julia LibRaw_jll
>=0.22.1+0, <0.22.2+0
0.22.2+0

Affected products

  • LibRaw LibRaw
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-131 Incorrect Calculation of Buffer Size
  • CWE-120 Buffer Copy without Checking Size of Input

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.