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CVE-2021-47466
mm, slub: fix potential memoryleak in kmem_cache_open()
Medium5.5EPSS 0.21%
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: mm, slub: fix potential memoryleak in kmem_cache_open() In error path, the random_seq of slub cache might be leaked. Fix this by using __kmem_cache_release() to release all the relevant resources.
Timeline
ID reserved
By Linux
Published
- 24 months later
· 24 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)
- 0.21% · top 89% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 210e7a43fa905bccafa9bb5966fba1d71f33eb8b – < 4f5d1c29cfab5cb0ab885059818751bdef32e2bb
- affected 210e7a43fa905bccafa9bb5966fba1d71f33eb8b – < 568f906340b43120abd6fcc67c37396482f85930
- affected 210e7a43fa905bccafa9bb5966fba1d71f33eb8b – < 42b81946e3ac9ea0372ba16e05160dc11e02694f
- affected 210e7a43fa905bccafa9bb5966fba1d71f33eb8b – < 9037c57681d25e4dcc442d940d6dbe24dd31f461
- affected 4.8
- unaffected < 4.8
- unaffected 5.4.156 – ≤ 5.4.*
- unaffected 5.10.76 – ≤ 5.10.*
- unaffected 5.14.15 – ≤ 5.14.*
- unaffected 5.15 – ≤ *
References (4)
- https://git.kernel.org/stable/c/4f5d1c29cfab5cb0ab885059818751bdef32e2bb (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/568f906340b43120abd6fcc67c37396482f85930 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/42b81946e3ac9ea0372ba16e05160dc11e02694f (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/9037c57681d25e4dcc442d940d6dbe24dd31f461 (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)
- 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://trackcve.app/cve/CVE-2021-47466)Record last updated .