CVE-2026-64082
- Source
- https://cve.org/CVERecord?id=CVE-2026-64082
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64082.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-64082
- Downstream
- Published
- 2026-07-19T15:39:54Z
- Modified
- 2026-09-05T03:30:58Z
- 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
compat_riscv_gpr_set() calls cregs_to_regs() unconditionally, even when user_regset_copyin() fails. Since cregs is an uninitialized stack variable, a copyin failure causes uninitialized stack data to be written into the target task's pt_regs, corrupting its register state and potentially leaking kernel stack contents.
compat_restore_sigcontext() has the same issue: it calls cregs_to_regs() even when __copy_from_user() fails, leading to the same corruption of the signal-returning task's register state on error.
Only call cregs_to_regs() when the user copy succeeds.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64082.json" }- References
-
- https://git.kernel.org/stable/c/0599aa23734c48de9bce36d043a9ec90c23945a1
- https://git.kernel.org/stable/c/2a7d1daf2674fe7d5b1cc99a4e3b5f0f72d5958f
- https://git.kernel.org/stable/c/66dedb6028c3df6c6a3372dd935b823917e150d5
- https://git.kernel.org/stable/c/6ebcbb53fc9bc30843054ed99fd60b8e542628f4
- https://git.kernel.org/stable/c/9e020156833f1ad0d425a1e3d85b65639f1c1c50
- https://git.kernel.org/stable/c/f2d88b0d7aebfa4643fc58bbae57210c6daff9c6
- 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
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced7383ee05314be58f8f9f018ee0ac53bef3808aeaFixedf2d88b0d7aebfa4643fc58bbae57210c6daff9c6Fixed66dedb6028c3df6c6a3372dd935b823917e150d5Fixed2a7d1daf2674fe7d5b1cc99a4e3b5f0f72d5958fFixed0599aa23734c48de9bce36d043a9ec90c23945a1Fixed9e020156833f1ad0d425a1e3d85b65639f1c1c50Fixed6ebcbb53fc9bc30843054ed99fd60b8e542628f4
Linux / Kernel
Package
- Name
- Kernel