CVE-2022-26981

Exp

Liblouis through 3.21.0 has a buffer overflow in compilePassOpcode in compileTranslationTable.c (called, indirectly, by tools/lou_checktable.c).

Published: 2022-03-13 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-26981 is rated High Exploit Risk (71.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.45%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.08% over the last day, indicating growing attacker interest. 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-2022-26981

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

Exploit prediction scoring system (EPSS) score for CVE-2022-26981

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 2026-06-15 0.37% 1.45% +1.08%
2 2026-03-18 0.34% 0.37% +0.02%
3 2025-11-21 — 0.34% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-26981

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
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.
 1.8 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2022-26981

OS Trackers for CVE-2022-26981

vendor priority summary link
alpine high CVE-2022-26981: 1 source package rows (liblouis); 4 state rows across 4 repos (3.20-community, 3.21-community, 3.22-community, edge-community); fixed 4, open 0. https://security.alpinelinux.org/vuln/CVE-2022-26981
debian not yet assigned CVE-2022-26981 not yet assigned priority: Debian including 1 source packages (liblouis), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. https://security-tracker.debian.org/tracker/CVE-2022-26981
gentoo low CVE-2022-26981: 1 GLSA(s) (202301-06), 1 atom(s) (dev-libs/liblouis); latest impact low. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-26981
redhat low — https://access.redhat.com/security/cve/CVE-2022-26981
suse high CVE-2022-26981 severity important: SUSE including 33 source package names (liblouis, liblouis-data, …), 188 product×package rows across 55 product lines (HPE Helion OpenStack 8, SUSE CaaS Platform 4.0, … (55 product lines)): Fixed 136, Known Not Affected 52. https://www.suse.com/security/cve/CVE-2022-26981/
ubuntu low CVE-2022-26981 low priority: Ubuntu including 1 source packages (liblouis), 14 status rows across 14 suites (bionic, focal, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): released 11, ignored 1, needed 1, needs-triage 1. https://ubuntu.com/security/CVE-2022-26981

Affected software / configurations for CVE-2022-26981

Vendor Product Version Raw CPE
liblouis liblouis <= 3.21.0 cpe:2.3:a:liblouis:liblouis:*:*:*:*:*:*:*:*
fedoraproject fedora 36 cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
apple ipados < 15.6 cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone_os < 15.6 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple macos >= 12.0, < 12.5 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple tvos < 15.6 cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
apple watchos < 8.7 cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

References for CVE-2022-26981

URL Tags
http://seclists.org/fulldisclosure/2022/Jul/12 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2022/Jul/15 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2022/Jul/16 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2022/Jul/18 Mailing List Third Party Advisory
https://github.com/liblouis/liblouis/issues/1171 Exploit Issue Tracking Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CFD2KIHESDUCNWTEW3USFB5GKTWT624L/
https://security.gentoo.org/glsa/202301-06 Third Party Advisory
https://support.apple.com/kb/HT213340 Third Party Advisory
https://support.apple.com/kb/HT213342 Third Party Advisory
https://support.apple.com/kb/HT213345 Third Party Advisory
https://support.apple.com/kb/HT213346 Third Party Advisory
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