CVE-2026-64082
- Source
- https://cve.org/CVERecord?id=CVE-2026-64082
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64082.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-64082
- Downstream
- Published
- 2026-07-19T15:39:54.074Z
- Modified
- 2026-07-22T05:30:06.930450888Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- riscv: Fix register corruption from uninitialized cregs on error
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
riscv: Fix register corruption from uninitialized cregs on error
compatriscvgprset() calls cregstoregs() unconditionally, even when userregsetcopyin() fails. Since cregs is an uninitialized stack variable, a copyin failure causes uninitialized stack data to be written into the target task's ptregs, corrupting its register state and potentially leaking kernel stack contents.
compatrestoresigcontext() has the same issue: it calls cregstoregs() even when __copyfromuser() fails, leading to the same corruption of the signal-returning task's register state on error.
Only call cregstoregs() when the user copy succeeds.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64082.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/6ebcbb53fc9bc30843054ed99fd60b8e542628f4
- https://git.kernel.org/stable/c/9e020156833f1ad0d425a1e3d85b65639f1c1c50
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64082.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-64082
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git