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NVD / CVE Program· CNA talos

CVE-2026-20889: A heap-based buffer overflow vulnerability exists in the x3f_thumb_loader functionality of LibRaw Commit d20315b.

Noroxi assessment

Priority: Monitor (action score 39/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.80% (FIRST EPSS); higher than 56.5% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: LibRaw (AlmaLinux:8) 0.19.5-6.el8_10; LibRaw-devel (AlmaLinux:8) 0.19.5-6.el8_10; libraw (Debian:12) 0.20.2-2.1+deb12u2.

Low priority for now. Upgrade to LibRaw (AlmaLinux:8) 0.19.5-6.el8_10; LibRaw-devel (AlmaLinux:8) 0.19.5-6.el8_10; libraw (Debian:12) 0.20.2-2.1+deb12u2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A heap-based buffer overflow vulnerability exists in the x3f_thumb_loader functionality of LibRaw 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.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Apr 7, 2026
Updated
Jul 15, 2026
EPSS
0.8% · 56th percentile

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · talos
9.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-20889

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
librawlibraw

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • libraw libraw0.22.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (talos). Independent of NVD's CPE analysis and usually ahead of it.

  • LibRaw LibRaw

    • Commit d20315baffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8LibRawbefore 0.19.5-6.el8_100.19.5-6.el8_10
AlmaLinux:8LibRaw-develbefore 0.19.5-6.el8_100.19.5-6.el8_10
Debian:12librawbefore 0.20.2-2.1+deb12u20.20.2-2.1+deb12u2
Debian:13librawbefore 0.21.4-2+deb13u10.21.4-2+deb13u1
Debian:14librawbefore 0.22.1-10.22.1-1
openSUSE:Leap 16.0librawbefore 0.21.4-160000.3.10.21.4-160000.3.1
openSUSE:Tumbleweedlibrawbefore 0.22.1-1.10.22.1-1.1
Red Hat:enterprise_linux:8::appstreamLibRawbefore 0:0.19.5-6.el8_100:0.19.5-6.el8_10
Red Hat:enterprise_linux:8::appstreamLibRaw-debuginfobefore 0:0.19.5-6.el8_100:0.19.5-6.el8_10
Red Hat:enterprise_linux:8::appstreamLibRaw-debugsourcebefore 0:0.19.5-6.el8_100:0.19.5-6.el8_10
Red Hat:enterprise_linux:8::appstreamLibRaw-samples-debuginfobefore 0:0.19.5-6.el8_100:0.19.5-6.el8_10
Red Hat:enterprise_linux:8::crbLibRaw-develbefore 0:0.19.5-6.el8_100:0.19.5-6.el8_10
Red Hat:rhel_aus:8.4::appstreamLibRawbefore 0:0.19.5-2.el8_4.10:0.19.5-2.el8_4.1
Red Hat:rhel_aus:8.4::appstreamLibRaw-debuginfobefore 0:0.19.5-2.el8_4.10:0.19.5-2.el8_4.1
Red Hat:rhel_aus:8.4::appstreamLibRaw-debugsourcebefore 0:0.19.5-2.el8_4.10:0.19.5-2.el8_4.1
Red Hat:rhel_aus:8.4::appstreamLibRaw-samples-debuginfobefore 0:0.19.5-2.el8_4.10:0.19.5-2.el8_4.1
Red Hat:rhel_aus:8.6::appstreamLibRawbefore 0:0.19.5-3.el8_6.10:0.19.5-3.el8_6.1
Red Hat:rhel_aus:8.6::appstreamLibRaw-debuginfobefore 0:0.19.5-3.el8_6.10:0.19.5-3.el8_6.1
Red Hat:rhel_aus:8.6::appstreamLibRaw-debugsourcebefore 0:0.19.5-3.el8_6.10:0.19.5-3.el8_6.1
Red Hat:rhel_aus:8.6::appstreamLibRaw-samples-debuginfobefore 0:0.19.5-3.el8_6.10:0.19.5-3.el8_6.1
Red Hat:rhel_e4s:8.8::appstreamLibRawbefore 0:0.19.5-3.el8_8.10:0.19.5-3.el8_8.1
Red Hat:rhel_e4s:8.8::appstreamLibRaw-debuginfobefore 0:0.19.5-3.el8_8.10:0.19.5-3.el8_8.1
Red Hat:rhel_e4s:8.8::appstreamLibRaw-debugsourcebefore 0:0.19.5-3.el8_8.10:0.19.5-3.el8_8.1
Red Hat:rhel_e4s:8.8::appstreamLibRaw-samples-debuginfobefore 0:0.19.5-3.el8_8.10:0.19.5-3.el8_8.1

+3

Same product

libraw: all records

Other highest-scoring records for the same primary product.

  • CVE-2015-8367The phase_one_correct function in Libraw before 0.17.1 allows attackers to cause memory errors and possibly execute arbitrary code, related
    41Plan
  • CVE-2015-8366Array index error in smal_decode_segment function in LibRaw before 0.17.1 allows context-dependent attackers to cause memory errors and poss
    41Plan
  • CVE-2017-14265A Stack-based Buffer Overflow was discovered in xtrans_interpolate in internal/dcraw_common.cpp in LibRaw before 0.18.3.
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-5342Apr 2, 2026 · LibRaw TIFF/NEF decoders_libraw.cpp nikon_load_padded_packed_raw out-of-bounds
    22Monitor
  • ← EarlierCVE-2026-20884Apr 7, 2026 · An integer overflow vulnerability exists in the deflate_dng_load_raw functionality of LibRaw Commit 8dc68e2.
    39Monitor
  • Later →CVE-2026-20911Apr 7, 2026 · A heap-based buffer overflow vulnerability exists in the HuffTable::initval functionality of LibRaw Commit 0b56545 and Commit d20315b.
    39Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:LibRaw0.19.5-6.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:LibRaw-devel0.19.5-6.el8_10 · AlmaLinux:8Package registry (OSV)
debian:libraw0.20.2-2.1+deb12u2 · Debian:12Package registry (OSV)
opensuse:libraw0.22.1-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:LibRaw0:0.19.5-6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:LibRaw-debuginfo0:0.19.5-6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:LibRaw-debugsource0:0.19.5-6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:LibRaw-devel0:0.19.5-6.el8_10 · Red Hat:enterprise_linux:8::crbPackage registry (OSV)
red hat:LibRaw-samples-debuginfo0:0.19.5-6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
rocky linux:LibRaw0:0.19.5-6.el8_10 · Rocky Linux:8Package registry (OSV)
suse:libraw0.21.1-150600.3.10.1 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-208840 days apartAn integer overflow vulnerability exists in the deflate_dng_load_raw functionality of LibRaw Commit 8dc68e2.
    39Monitor
  • CVE-2026-244500 days apartAn integer overflow vulnerability exists in the uncompressed_fp_dng_load_raw functionality of LibRaw Commit 8dc68e2.
    39Monitor
  • CVE-2026-246600 days apartA heap-based buffer overflow vulnerability exists in the x3f_load_huffman functionality of LibRaw Commit d20315b.
    32Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records