Time-of-check Time-of-use (TOCTOU) Race Condition Affecting std/internal/syscall/unix package, versions <1.25.9>=1.26.0-0 <1.26.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-STDINTERNALSYSCALLUNIX-16086164
- published16 Apr 2026
- disclosed7 Apr 2026
- creditUuganbayar Lkhamsuren
Introduced: 7 Apr 2026
CVE-2026-32282 (opens in a new tab)How to fix?
Upgrade std/internal/syscall/unix to version 1.25.9, 1.26.2 or higher.
Overview
std/internal/syscall/unix is a Go standard library package std/internal/syscall/unix
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition.
Go Vulnerability Report:
On Linux, if the target of Root.Chmod is replaced with a symlink while the chmod operation is in progress, Chmod can operate on the target of the symlink, even when the target lies outside the root. The Linux fchmodat syscall silently ignores the AT_SYMLINK_NOFOLLOW flag, which Root.Chmod uses to avoid symlink traversal. Root.Chmod checks its target before acting and returns an error if the target is a symlink lying outside the root, so the impact is limited to cases where the target is replaced with a symlink between the check and operation.