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
This issue was fixed in commit 2467fe0
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| eradman | entr | unaffected |
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Mon, 10 Aug 2026 13:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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 | |
| Title | Heap-based buffer overflow in entr | |
| Weaknesses | CWE-122 | |
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| Metrics |
cvssV4_0
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MITRE
Status: PUBLISHED
Assigner: CERT-PL
Published:
Updated: 2026-08-10T12:56:34.454Z
Reserved: 2026-07-30T10:05:07.781Z
Link: CVE-2026-18370
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