CVE-2026-49421
UNSCOREDDescription
The kernel function that implements unlinkat(2) and funlinkat(2) validated the AT_RESOLVE_BENEATH flag but failed to pass it through to the underlying path lookup. The flag was silently dropped, so path resolution was not actually restricted. A process that uses AT_RESOLVE_BENEATH with unlinkat(2) or funlinkat(2) to confine path resolution can in fact resolve paths above the starting directory. A caller relying on this flag for path containment may delete files outside the intended directory tree.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3.1 Vector
No CVSS vector data available.
Exploit Intelligence
Low risk: more likely to be exploited than 3% of all known CVEs.
References
Related Vulnerabilities
Other CWE-273 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2011-2921 | Critical | 9.8 | 83% | - | - |
| CVE-2024-38813 | High | 7.5 | 17% | KEV | Fix |
| CVE-2017-6972 | Critical | 9.8 | 11% | - | - |
| CVE-2015-0278 | High | 10.0 | 3.2% | - | Fix |
| CVE-2019-18276 | High | 7.8 | 2.6% | - | Fix |
| CVE-2021-36372 | Critical | 9.8 | 2.4% | - | Fix |
Common questions
How do I fix CVE-2026-49421?
No published fix for CVE-2026-49421 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-49421 being actively exploited?
Not that we know of. CVE-2026-49421 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.13% is the estimated probability that it will be exploited in the next 30 days. That is higher than 3% of all scored CVEs.
Embed a live status badge for CVE-2026-49421
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-19.