CVE-2022-50756
nvme-pci: fix mempool alloc size
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: nvme-pci: fix mempool alloc size Convert the max size to bytes to match the units of the divisor that calculates the worst-case number of PRP entries. The result is used to determine how many PRP Lists are required. The code was previously rounding this to 1 list, but we can require 2 in the worst case. In that scenario, the driver would corrupt memory beyond the size provided by the mempool. While unlikely to occur (you'd need a 4MB in exactly 127 phys segments on a queue that doesn't support SGLs), this memory corruption has been observed by kfence.
Timeline
ID reserved
By Linux
Published
- 10 months later
· 10 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 |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Deferred | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.20% · top 90% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 943e942e6266f22babee5efeb00f8f672fbff5bd – < dfb6d54893d544151e7f480bc44cfe7823f5ad23
- affected 943e942e6266f22babee5efeb00f8f672fbff5bd – < 9141144b37f30e3e7fa024bcfa0a13011e546ba9
- affected 943e942e6266f22babee5efeb00f8f672fbff5bd – < e1777b4286e526c58b4ee699344b0ad85aaf83a0
- affected 943e942e6266f22babee5efeb00f8f672fbff5bd – < b1814724e0d7162bdf4799f2d565381bc2251c63
- affected 943e942e6266f22babee5efeb00f8f672fbff5bd – < c89a529e823d51dd23c7ec0c047c7a454a428541
- affected 4.18
- unaffected < 4.18
- unaffected 5.10.163 – ≤ 5.10.*
- unaffected 5.15.87 – ≤ 5.15.*
- unaffected 6.0.17 – ≤ 6.0.*
- unaffected 6.1.3 – ≤ 6.1.*
- unaffected 6.2 – ≤ *
References (5)
- https://git.kernel.org/stable/c/dfb6d54893d544151e7f480bc44cfe7823f5ad23 (opens in a new tab)
- https://git.kernel.org/stable/c/9141144b37f30e3e7fa024bcfa0a13011e546ba9 (opens in a new tab)
- https://git.kernel.org/stable/c/e1777b4286e526c58b4ee699344b0ad85aaf83a0 (opens in a new tab)
- https://git.kernel.org/stable/c/b1814724e0d7162bdf4799f2d565381bc2251c63 (opens in a new tab)
- https://git.kernel.org/stable/c/c89a529e823d51dd23c7ec0c047c7a454a428541 (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)
- 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-2022-50756)Record last updated .