CVE-2026-19499 GNU C Library - Buffer Overflow

GNU C Library 2.38 to 2.44 contains a buffer overflow caused by strfmon and strfmon_l functions writing past the end of the output buffer with right-justified width padding, letting attackers cause memory corruption, exploit requires specific application code paths with vulnerable buffer sizes.

CVSS base score 7.7 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.30% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service, Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:H
Published
14 September 2026
Updated
15 October 2026
Weakness
CWE-122

Vendor fix

Update to a version later than 2.44 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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