{"id":"GHSA-pmf6-rcx4-v53v","summary":"mkfifo: permissions of an existing file are changed after FIFO creation fails","details":"When `mkfifo()` fails (e.g. target already exists), the code shows an error but is missing a `continue;`, so it falls through to `fs::set_permissions` and changes the permissions of the pre-existing file to the default FIFO mode (`0o666` & umask -\u003e `0644`).\n\n```\n$ touch secret; chmod 000 secret\n$ coreutils mkfifo secret fifo3 fifo4\nmkfifo: cannot create fifo 'secret': File exists\n$ ll secret      # uutils:\nprw-r--r-- secret   # changed to 644 (GNU leaves it 000)\n```\n\n**Impact:** an attacker (or user error) can relax permissions on sensitive owner-only files such as SSH private keys, exposing them to other users. Recommendation: add `continue;` after the error.\n\n**Remediation:** Acknowledged by Canonical; fixed in PR #10376.\n\n---\n_Reported by Zellic in the *uutils coreutils Program Security Assessment* (prepared for Canonical, Jan 20 2026), audited commit `3a07ffc5a9bd4c283e75afa548ba1f1957bad242`. Finding 3.8. Credit: Zellic._\n\n_Upstream tracking issue: https://github.com/uutils/coreutils/issues/10020 · CVE-2026-35341_","aliases":["CVE-2026-35341"],"modified":"2026-07-06T22:11:26.860551Z","published":"2026-07-06T21:53:34Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-07-06T21:53:34Z","nvd_published_at":null,"cwe_ids":["CWE-281","CWE-732"],"severity":"HIGH"},"references":[{"type":"WEB","url":"https://github.com/uutils/coreutils/security/advisories/GHSA-pmf6-rcx4-v53v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35341"},{"type":"WEB","url":"https://github.com/uutils/coreutils/issues/10020"},{"type":"WEB","url":"https://github.com/uutils/coreutils/pull/10376"},{"type":"PACKAGE","url":"https://github.com/uutils/coreutils"}],"affected":[{"package":{"name":"uu_mkfifo","ecosystem":"crates.io","purl":"pkg:cargo/uu_mkfifo"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.6.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-pmf6-rcx4-v53v/GHSA-pmf6-rcx4-v53v.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"}]}