CVE-2026-109854
M17n-lib: uninitialized stack read in iso-2022 compound text utf-8 decoding
CVSS Score
2.5
EPSS Score
0.0%
EPSS Percentile
0th
A 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.
| CWE | CWE-457 |
| Vendor | red hat |
| Product | red hat enterprise linux 10 |
| Published | Oct 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected References
access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-109854 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2550285 cgit.git.savannah.nongnu.org: https://cgit.git.savannah.nongnu.org/cgit/m17n/m17n-lib.git/commit/?id=f3b85087f90189f91c04ba1b62c5f0b879ff2b20 lists.gnu.org: https://lists.gnu.org/archive/html/m17n-list/2026-10/msg00001.html
Credits
Red Hat would like to thank Chamod Anuradha Denipitiya for reporting this issue.