CVE-2026-107168
M17n-lib: parser infinite loop on malformed utf-8 in count_utf_8_chars()
A flaw was found in m17n-lib. By providing crafted input containing an invalid UTF-8 character sequence, an attacker can cause the text parsing function to enter an infinite loop. This issue leads to sustained high CPU utilization, resulting in a Denial of Service (DoS) for the affected application.
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
What each source reports
CVE List Score used
M17n-lib: parser infinite loop on malformed utf-8 in count_utf_8_chars()
A flaw was found in m17n-lib. By providing crafted input containing an invalid UTF-8 character sequence, an attacker can cause the text parsing function to enter an infinite loop. This issue leads to sustained high CPU utilization, resulting in a Denial of Service (DoS) for the affected application.
- Record
CVE-2026-107168- CVSS 3.1
- 6.2 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-835
- Updated
- 2026-11-05
EUVDEUVD-2026-94313
A flaw was found in m17n-lib. By providing crafted input containing an invalid UTF-8 character sequence, an attacker can cause the text parsing function to enter an infinite loop. This issue leads to sustained high CPU utilization, resulting in a Denial of Service (DoS) for the affected application.
- Record
EUVD-2026-94313- CVSS 3.1
- 6.2 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-05
GitHub AdvisoriesGHSA-rgch-6vg6-rm4p
A flaw was found in m17n-lib. By providing crafted input containing an invalid UTF-8 character...
A flaw was found in m17n-lib. By providing crafted input containing an invalid UTF-8 character sequence, an attacker can cause the text parsing function to enter an infinite loop. This issue leads to sustained high CPU utilization, resulting in a Denial of Service (DoS) for the affected application.
- Record
GHSA-rgch-6vg6-rm4p- CVSS 3.1
- 6.2 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-835
- Updated
- 2026-11-02
NVD
A flaw was found in m17n-lib. By providing crafted input containing an invalid UTF-8 character sequence, an attacker can cause the text parsing function to enter an infinite loop. This issue leads to sustained high CPU utilization, resulting in a Denial of Service (DoS) for the affected application.
- Record
CVE-2026-107168- CVSS 3.1
- 6.2 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-835
- Updated
- 2026-11-05
OSVDEBIAN-CVE-2026-107168
A flaw was found in m17n-lib. By providing crafted input containing an invalid UTF-8 character sequence, an attacker can cause the text parsing function to enter an infinite loop. This issue leads to sustained high CPU utilization, resulting in a Denial of Service (DoS) for the affected application.
- Record
DEBIAN-CVE-2026-107168- CVSS 3.1
- 6.2 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-107168
A flaw was found in m17n-lib. By providing crafted input containing an invalid UTF-8 character sequence, an attacker can cause the text parsing function to enter an infinite loop. This issue leads to sustained high CPU utilization, resulting in a Denial of Service (DoS) for the affected application.
- Record
UBUNTU-CVE-2026-107168- CVSS 3.1
- 6.2 Medium
CVSS: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
| Package | Affected | Fixed |
|---|---|---|
m17n-libDebian: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 less1.8.4-21.8.5-11.8.6-11.8.7-1 |
None known |
m17n-libDebian:13 |
All versions, plus listed versions 1.8.5-11.8.6-11.8.7-1 |
None known |
m17n-libDebian:14 |
before 1.8.7-1, plus listed versions 1.8.5-11.8.6-1 |
1.8.7-1 |
m17n-libUbuntu:16.04:LTS |
All versions, plus listed versions 1.6.4-31.7.0-11.7.0-21.7.0-3 |
None known |
m17n-libUbuntu:18.04:LTS |
All versions, plus listed versions 1.7.0-31.7.0-3build1 |
None known |
m17n-libUbuntu:20.04:LTS |
All versions, plus listed versions 1.8.0-2 |
None known |
m17n-libUbuntu: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-libUbuntu:24.04:LTS |
All versions, plus listed versions 1.8.4-11.8.4-1build11.8.4-1build2 |
None known |
m17n-libUbuntu:26.10 |
All versions, plus listed versions 1.8.6-1 |
None known |
m17n-libUbuntu:26.04:LTS |
All versions, plus listed versions 1.8.5-1build11.8.6-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | CVE List | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-107168 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 0.11%, the 1st percentile. Fixed in m17n-lib 1.8.7-1.