CVE-2026-20889

Exp

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.

Published: 2026-04-07 Last update: 2026-04-10 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-20889 is rated High Exploit Risk (60/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.05%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2026-20889

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2026-20889

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-13 0.04% 0.05% +0.01%
2 2026-04-08 — 0.04% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-20889

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2026-20889

OS Trackers for CVE-2026-20889

vendor priority summary link
alpine — CVE-2026-20889: 1 source package rows (libraw); 2 state rows across 1 repos (edge-community); fixed 1, open 1. https://security.alpinelinux.org/vuln/CVE-2026-20889
debian not yet assigned CVE-2026-20889 not yet assigned priority: Debian including 1 source packages (libraw), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2. https://security-tracker.debian.org/tracker/CVE-2026-20889
redhat high — https://access.redhat.com/security/cve/CVE-2026-20889
suse high CVE-2026-20889 severity important: SUSE including 13 source package names (libraw, libraw-devel, …), 52 product×package rows across 18 product lines (SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS, SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS, … (18 product lines)): Known Not Affected 36, First Fixed 16. https://www.suse.com/security/cve/CVE-2026-20889/
ubuntu medium CVE-2026-20889 medium priority: Ubuntu including 8 source packages (darktable, dcraw, …), 63 status rows across 8 suites (bionic, focal, jammy, noble, questing, resolute, upstream, xenial): needs-triage 51, DNE 4, needed 4, not-affected 3, released 1. https://ubuntu.com/security/CVE-2026-20889

Affected software / configurations for CVE-2026-20889

Vendor Product Version Raw CPE
libraw libraw 0.22.0 cpe:2.3:a:libraw:libraw:0.22.0:*:*:*:*:*:*:*

References for CVE-2026-20889

cvelogic Threat Intelligence