CVE-2022-50226crypto: ccp - Use kzalloc for sev ioctl interfaces to prevent kernel memory leak
- 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: crypto: ccp - Use kzalloc for sev ioctl interfaces to prevent kernel memory leak For some sev ioctl interfaces, input may be passed that is less than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data that PSP firmware returns. In this case, kmalloc will allocate memory that is the size of the input rather than the size of the data. Since PSP firmware doesn't fully overwrite the buffer, the sev ioctl interfaces with the issue may return uninitialized slab memory. Currently, all of the ioctl interfaces in the ccp driver are safe, but to prevent future problems, change all ioctl interfaces that allocate memory with kmalloc to use kzalloc and memset the data buffer to zero in sev_ioctl_do_platform_status.
Timeline
ID reserved
By Linux
Published
- 11 months later
· 11 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 (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected e799035609e1526761aa2f896a974b233d04d36d – < 4c5300f6f5e18b11c02a92f136e69b98fddba15e
- affected e799035609e1526761aa2f896a974b233d04d36d – < f2a920daa780956b987c14b9f23de7c3c8915bf2
- affected e799035609e1526761aa2f896a974b233d04d36d – < caa395aa16e7c9193fd7fa6cde462dd8229d4953
- affected e799035609e1526761aa2f896a974b233d04d36d – < e11fb0a3a39bb42da35fa662c46ce7391f277436
- affected e799035609e1526761aa2f896a974b233d04d36d – < 13dc15a3f5fd7f884e4bfa8c011a0ae868df12ae
- affected 4.16
- unaffected < 4.16
- unaffected 5.10.173 – ≤ 5.10.*
- unaffected 5.15.61 – ≤ 5.15.*
- unaffected 5.18.18 – ≤ 5.18.*
- unaffected 5.19.2 – ≤ 5.19.*
- unaffected 6.0 – ≤ *
References
References5
- https://git.kernel.org/stable/c/4c5300f6f5e18b11c02a92f136e69b98fddba15e (opens in a new tab)
- https://git.kernel.org/stable/c/f2a920daa780956b987c14b9f23de7c3c8915bf2 (opens in a new tab)
- https://git.kernel.org/stable/c/caa395aa16e7c9193fd7fa6cde462dd8229d4953 (opens in a new tab)
- https://git.kernel.org/stable/c/e11fb0a3a39bb42da35fa662c46ce7391f277436 (opens in a new tab)
- https://git.kernel.org/stable/c/13dc15a3f5fd7f884e4bfa8c011a0ae868df12ae (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-2022-55484 (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-2022-50226)Record last updated .