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.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00008.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Go standard library internal/syscall/unix unaffected
Version Status Constraints
0 affected < 1.25.9
1.26.0-0 affected < 1.26.2

Configuration 1 [-]

OR cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://go.dev/cl/763761 cve-icon cve-icon cve-icon
https://go.dev/issue/78293 cve-icon cve-icon cve-icon
https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-32282 cve-icon
https://pkg.go.dev/vuln/GO-2026-4864 cve-icon cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-32282 cve-icon
History

Thu, 16 Apr 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Golang
Golang go
Weaknesses CWE-59
CPEs cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
Vendors & Products Golang
Golang go

Mon, 13 Apr 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H'}

 ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H'}

Fri, 10 Apr 2026 10:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-682

Fri, 10 Apr 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H'}

threat_severity

Moderate

Wed, 08 Apr 2026 20:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-367
CWE-682

Wed, 08 Apr 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Go Standard Library
Go Standard Library internal/syscall/unix
Vendors & Products Go Standard Library
Go Standard Library internal/syscall/unix

Wed, 08 Apr 2026 01:45:00 +0000

Type Values Removed Values Added
Description 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.
Title TOCTOU permits root escape on Linux via Root.Chmod in os in internal/syscall/unix
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published:

Updated: 2026-04-13T18:20:56.456Z

Reserved: 2026-03-11T16:38:46.556Z

Link: CVE-2026-32282

cve-icon Vulnrichment

Updated: 2026-04-13T17:47:38.773Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-08T02:16:03.467

Modified: 2026-04-16T19:15:39.400

Link: CVE-2026-32282

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-04-08T01:06:55Z

Links: CVE-2026-32282 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-04-17T09:30:14Z

Weaknesses