entr is vulnerable to Heap-based buffer overflow in run_utility() function. The function allocates a fixed-size heap buffer using malloc(ARG_MAX) and copies command-line arguments into it. It advances the destination pointer based on the return value of strlcpy(), which returns the total length of the source string rather than the number of bytes written. When the buffer is exactly filled, the remaining size underflows as an unsigned size_t, causing subsequent copies to write out of bounds. This can be triggered by supplying command-line arguments whose combined length fills the buffer, or via the /_ substitution feature which expands a short token into a longer pathname at runtime. The local attacker can cause memory corruption, process abort, and denial of service.
This issue was fixed in commit 2467fe0
CVSS
No CVSS.
References
Configurations
No configuration.
History
No history.
Information
Published : 2026-08-10 13:17
Updated : 2026-08-28 15:26
NVD link : CVE-2026-18370
Mitre link : CVE-2026-18370
CVE.ORG link : CVE-2026-18370
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Products Affected
No product.
CWE
CWE-122
Heap-based Buffer Overflow