CVE-2021-47407KVM: x86: Handle SRCU initialization failure during page track init
- 5.5MediumCVSS base score
- 0.25%Exploitation in 30 daysEPSS · top 84% 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: KVM: x86: Handle SRCU initialization failure during page track init Check the return of init_srcu_struct(), which can fail due to OOM, when initializing the page track mechanism. Lack of checking leads to a NULL pointer deref found by a modified syzkaller. [Move the call towards the beginning of kvm_arch_init_vm. - Paolo]
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)
- 0.25% · top 84% of all CVEs (12 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 0eb05bf290cfe8610d9680b49abef37febd1c38a – < deb2949417677649e2413266d7ce8c2ff73952b4
- affected 0eb05bf290cfe8610d9680b49abef37febd1c38a – < 4664318f73e496cd22c71b10888e75434a123e23
- affected 0eb05bf290cfe8610d9680b49abef37febd1c38a – < eb7511bf9182292ef1df1082d23039e856d1ddfb
- affected 4.6
- unaffected < 4.6
- unaffected 5.10.71 – ≤ 5.10.*
- unaffected 5.14.10 – ≤ 5.14.*
- unaffected 5.15 – ≤ *
References
References3
- https://git.kernel.org/stable/c/deb2949417677649e2413266d7ce8c2ff73952b4 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/4664318f73e496cd22c71b10888e75434a123e23 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/eb7511bf9182292ef1df1082d23039e856d1ddfb (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-2021-34412 (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-2021-47407)Record last updated .