M17n-lib: uninitialized stack read in iso-2022 compound text utf-8 decoding

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-109854
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-13 10:17:15 UTC
Updated2026-10-13 10:17:15 UTC
DescriptionA flaw was found in m17n-lib. An attacker who supplies crafted input to an application processing ISO-2022 encoded text can cause the library to read uninitialized memory from the stack. If the application exposes or returns the decoded output, this flaw can result in unexpected behavior and limited information disclosure.

Risk And Classification

Primary CVSS: v3.1 2.5 LOW from [email protected]

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

Problem Types: CWE-457 | CWE-457 Use of Uninitialized Variable

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary2.5LOWCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
3.1CNACVSS2.5LOWCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 10 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified

References

ReferenceSourceLinkTags
cgit.git.savannah.nongnu.org/cgit/m17n/m17n-lib.git/commit [email protected] cgit.git.savannah.nongnu.org
access.redhat.com/security/cve/CVE-2026-109854 [email protected] access.redhat.com
lists.gnu.org/archive/html/m17n-list/2026-10/msg00001.html [email protected] lists.gnu.org
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Red Hat would like to thank Chamod Anuradha Denipitiya for reporting this issue. (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-10-08T10:27:31.000ZReported to Red Hat.
CNA2026-10-13T07:28:14.000ZMade public.

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