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CVE-2026-107167

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

6.2 Medium

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.12%Unchanged since Oct 8, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.2

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

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.

Record
CVE-2026-107167
CVSS 3.1
6.2 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-416
Updated
2026-11-05
EUVDEUVD-2026-94365 6.2

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.

Record
EUVD-2026-94365
CVSS 3.1
6.2 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-05
GitHub AdvisoriesGHSA-3wc7-m5vh-qr2g 6.2

A flaw was found in m17n-lib. A user providing specially crafted text input can trigger a heap...

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.

Record
GHSA-3wc7-m5vh-qr2g
CVSS 3.1
6.2 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-416
Updated
2026-11-02
NVD 6.2

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.

Record
CVE-2026-107167
CVSS 3.1
6.2 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-416
Updated
2026-11-05
OSVDEBIAN-CVE-2026-107167 6.2

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.

Record
DEBIAN-CVE-2026-107167
CVSS 3.1
6.2 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-06
OSVUBUNTU-CVE-2026-107167 6.2

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.

Record
UBUNTU-CVE-2026-107167
CVSS 3.1
6.2 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
m17n-lib
Debian:12
All versions, plus listed versions
1.8.0-61.8.2-11.8.3-11.8.3-21.8.4-1
Show 4 moreShow less
1.8.4-21.8.5-11.8.6-11.8.7-1
None known
m17n-lib
Debian:13
All versions, plus listed versions
1.8.5-11.8.6-11.8.7-1
None known
m17n-lib
Debian:14
All versions, plus listed versions
1.8.5-11.8.6-11.8.7-1
None known
m17n-lib
Ubuntu:16.04:LTS
All versions, plus listed versions
1.6.4-31.7.0-11.7.0-21.7.0-3
None known
m17n-lib
Ubuntu:18.04:LTS
All versions, plus listed versions
1.7.0-31.7.0-3build1
None known
m17n-lib
Ubuntu:20.04:LTS
All versions, plus listed versions
1.8.0-2
None known
m17n-lib
Ubuntu:22.04:LTS
All versions, plus listed versions
1.8.0-2build11.8.0-31.8.0-3build11.8.0-3.11.8.0-4
None known
m17n-lib
Ubuntu:24.04:LTS
All versions, plus listed versions
1.8.4-11.8.4-1build11.8.4-1build2
None known
m17n-lib
Ubuntu:26.10
All versions, plus listed versions
1.8.6-1
None known
m17n-lib
Ubuntu:26.04:LTS
All versions, plus listed versions
1.8.5-1build11.8.6-1
None known

History

History
RecordedChangedSources
affectedEUVD, NVD, OSV
factsCVE List
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-107167 is a medium vulnerability (CVSS 6.2) in Red Hat Enterprise Linux 10, published October 7, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.12%, the 1st percentile. No source names a fixed version.

References

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