CVE-2022-49568KVM: Don't null dereference ops->destroy
- 5.5MediumCVSS base score
- 0.30%Exploitation in 30 daysEPSS · top 77% 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: Don't null dereference ops->destroy A KVM device cleanup happens in either of two callbacks: 1) destroy() which is called when the VM is being destroyed; 2) release() which is called when a device fd is closed. Most KVM devices use 1) but Book3s's interrupt controller KVM devices (XICS, XIVE, XIVE-native) use 2) as they need to close and reopen during the machine execution. The error handling in kvm_ioctl_create_device() assumes destroy() is always defined which leads to NULL dereference as discovered by Syzkaller. This adds a checks for destroy!=NULL and adds a missing release(). This is not changing kvm_destroy_devices() as devices with defined release() should have been removed from the KVM devices list by then.
Timeline
ID reserved
By Linux
Published
- 15 months later
· 15 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 |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 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)
- 0.30% · top 77% 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 852b6d57dc7fa378019786fa84727036e56839ea – < 170465715a60cbb7876e6b961b21bd3225469da8
- affected 852b6d57dc7fa378019786fa84727036e56839ea – < 3616776bc51cd3262bb1be60cc01c72e0a1959cf
- affected 852b6d57dc7fa378019786fa84727036e56839ea – < e91665fbbf3ccb268b268a7d71a6513538d813ac
- affected 852b6d57dc7fa378019786fa84727036e56839ea – < d4a5a79b780891c5cbdfdc6124d46fdf8d13dba1
- affected 852b6d57dc7fa378019786fa84727036e56839ea – < e8bc2427018826e02add7b0ed0fc625a60390ae5
- affected 3.10
- unaffected < 3.10
- unaffected 5.4.210 – ≤ 5.4.*
- unaffected 5.10.134 – ≤ 5.10.*
- unaffected 5.15.58 – ≤ 5.15.*
- unaffected 5.18.15 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References
References5
- https://git.kernel.org/stable/c/170465715a60cbb7876e6b961b21bd3225469da8 (opens in a new tab)
- https://git.kernel.org/stable/c/3616776bc51cd3262bb1be60cc01c72e0a1959cf (opens in a new tab)
- https://git.kernel.org/stable/c/e91665fbbf3ccb268b268a7d71a6513538d813ac (opens in a new tab)
- https://git.kernel.org/stable/c/d4a5a79b780891c5cbdfdc6124d46fdf8d13dba1 (opens in a new tab)
- https://git.kernel.org/stable/c/e8bc2427018826e02add7b0ed0fc625a60390ae5 (opens in a new tab)
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-2022-54664 (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-2022-49568)Record last updated .