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Vulnerability · Published Oct 7, 2026 · Assigned by redhat

CVE-2026-107167M17n-lib: heap use-after-free write in re_init_ic()

Medium 6.2

In plain English

A medium-severity use-after-free in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).

Severity (CVSS 3.1)6.2Medium
Exploit odds (30 days)0.1%top 98.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in m17n-lib. A user providing specially crafted text input can trigger a heap use-after-free condition during input-method state transitions. Under specific conditions, the library frees an internal input context object but subsequently attempts to write to that freed memory. This issue can cause applications relying on the library to crash, leading to a Denial of Service (DoS), or potentially allow arbitrary code execution.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12m17n-libno fix listedDEBIAN-CVE-2026-107167
Debian:13m17n-libno fix listedDEBIAN-CVE-2026-107167
Debian:14m17n-libno fix listedDEBIAN-CVE-2026-107167
Ubuntu:22.04:LTSm17n-libno fix listedUBUNTU-CVE-2026-107167
Ubuntu:24.04:LTSm17n-libno fix listedUBUNTU-CVE-2026-107167
Ubuntu:26.04:LTSm17n-libno fix listedUBUNTU-CVE-2026-107167
Ubuntu:26.10m17n-libno fix listedUBUNTU-CVE-2026-107167

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references

Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References