CVE-2024-38667riscv: prevent pt_regs corruption for secondary idle threads
- 7.8HighCVSS base score
- 0.23%Exploitation in 30 daysEPSS · top 86% 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: riscv: prevent pt_regs corruption for secondary idle threads Top of the kernel thread stack should be reserved for pt_regs. However this is not the case for the idle threads of the secondary boot harts. Their stacks overlap with their pt_regs, so both may get corrupted. Similar issue has been fixed for the primary hart, see c7cdd96eca28 ("riscv: prevent stack corruption by reserving task_pt_regs(p) early"). However that fix was not propagated to the secondary harts. The problem has been noticed in some CPU hotplug tests with V enabled. The function smp_callin stored several registers on stack, corrupting top of pt_regs structure including status field. As a result, kernel attempted to save or restore inexistent V context.
Timeline
ID reserved
By Linux
- 3 days later
· 3 days later
Published
- 23 months later
· 23 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 | 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)
- 0.23% · top 86% 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: High 7.8.
Affected products
- affected 2875fe0561569f82d0e63658ccf0d11ce7da8922 – < ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e
- affected 2875fe0561569f82d0e63658ccf0d11ce7da8922 – < 3090c06d50eaa91317f84bf3eac4c265e6cb8d44
- affected 2875fe0561569f82d0e63658ccf0d11ce7da8922 – < 0c1f28c32a194303da630fca89481334b9547b80
- affected 2875fe0561569f82d0e63658ccf0d11ce7da8922 – < a638b0461b58aa3205cd9d5f14d6f703d795b4af
- affected 5.7
- unaffected < 5.7
- unaffected 6.1.93 – ≤ 6.1.*
- unaffected 6.6.33 – ≤ 6.6.*
- unaffected 6.9.4 – ≤ 6.9.*
- unaffected 6.10 – ≤ *
References
References4
- https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af (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-2024-37519 (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-2024-38667)Record last updated .