CVE-2021-47579ovl: fix warning in ovl_create_real()
- 5.5MediumCVSS base score
- 0.24%Exploitation in 30 daysEPSS · top 85% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: ovl: fix warning in ovl_create_real() Syzbot triggered the following warning in ovl_workdir_create() -> ovl_create_real(): if (!err && WARN_ON(!newdentry->d_inode)) { The reason is that the cgroup2 filesystem returns from mkdir without instantiating the new dentry. Weird filesystems such as this will be rejected by overlayfs at a later stage during setup, but to prevent such a warning, call ovl_mkdir_real() directly from ovl_workdir_create() and reject this case early.
Timeline
ID reserved
By Linux
- 26 days later
· 26 days later
Published
- 23 months later
· 23 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c – < 445d2dc63e5871d218f21b8f62ab29ac72f2e6b8
- affected e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c – < f9f300a92297be8250547347fd52216ef0177ae0
- affected e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c – < 6859985a2fbda5d1586bf44538853e1be69e85f7
- affected e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c – < d2ccdd4e4efab06178608a34d7bfb20a54104c02
- affected e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c – < 1f5573cfe7a7056e80a92c7a037a3e69f3a13d1c
- affected 3.18
- unaffected < 3.18
- unaffected 4.19.222 – ≤ 4.19.*
- unaffected 5.4.168 – ≤ 5.4.*
- unaffected 5.10.88 – ≤ 5.10.*
- unaffected 5.15.11 – ≤ 5.15.*
- unaffected 5.16 – ≤ *
References
References5
- https://git.kernel.org/stable/c/445d2dc63e5871d218f21b8f62ab29ac72f2e6b8 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/f9f300a92297be8250547347fd52216ef0177ae0 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/6859985a2fbda5d1586bf44538853e1be69e85f7 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/d2ccdd4e4efab06178608a34d7bfb20a54104c02 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/1f5573cfe7a7056e80a92c7a037a3e69f3a13d1c (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-34581 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-47579)Record last updated .