OESA-2026-3486 (CVE-2026-18370)
Vulnerability from osv_openeuler – Published: 2026-08-20 10:01 – Updated: 2026-08-20 10:01 – Source websiteA file watcher, which can run specified commands when target files change.
Security Fix(es):
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.(CVE-2026-18370)
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"aarch64": [
"entr-5.8-2.oe2403sp3.aarch64.rpm",
"entr-debuginfo-5.8-2.oe2403sp3.aarch64.rpm",
"entr-debugsource-5.8-2.oe2403sp3.aarch64.rpm"
],
"src": [
"entr-5.8-2.oe2403sp3.src.rpm"
],
"x86_64": [
"entr-5.8-2.oe2403sp3.x86_64.rpm",
"entr-debuginfo-5.8-2.oe2403sp3.x86_64.rpm",
"entr-debugsource-5.8-2.oe2403sp3.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:24.03-LTS-SP3",
"name": "entr",
"purl": "pkg:rpm/openEuler/entr\u0026distro=openEuler-24.03-LTS-SP3"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.8-2.oe2403sp3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"severity": "Medium"
},
"details": "A file watcher, which can run specified commands when target files change.\r\n\r\nSecurity Fix(es):\n\nentr 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.(CVE-2026-18370)",
"id": "OESA-2026-3486",
"modified": "2026-08-20T10:01:44Z",
"published": "2026-08-20T10:01:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3486"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18370"
}
],
"schema_version": "1.7.2",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
],
"summary": "entr security update",
"upstream": [
"CVE-2026-18370"
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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