Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
microtar through 0.1.0 contains a stack-based buffer overflow vulnerability in the raw_to_header() function in src/microtar.c that allows attackers to corrupt adjacent stack memory by supplying a crafted TAR archive with non-null-terminated name or linkname fields. The function uses strcpy() to copy 100-byte ustar format fields that lack null terminators, causing writes of up to 355 bytes into a 100-byte destination buffer when mtar_open(), mtar_find(), or mtar_read_header() process attacker-supplied TAR archives.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
NONE
🚨 HIGH SEVERITY: CVE-2026-43623 (CVSS 8.8) microtar ≤0.1.0 stack buffer overflow in raw_to_header(). Crafted TAR archives can corrupt memory via non-null-terminated fields. Patch immediately if using this library. #CVE #Vulnerability #PatchNow https://t.co/johyqfjugW
Post summary
The post announces a high-severity CVE-2026-43623 causing a stack buffer overflow in microtar and urges immediate patching of the affected library.