CVE-2026-63837
- Source
- https://cve.org/CVERecord?id=CVE-2026-63837
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63837.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-63837
- Downstream
- Published
- 2026-07-19T14:04:33.781Z
- Modified
- 2026-07-21T03:47:33.078597893Z
- Summary
- net: ena: PHC: Check return code before setting timestamp output
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: ena: PHC: Check return code before setting timestamp output
enaphcgettimex64() is setting the output parameter regardless of whether enacomphcgettimestamp() succeeded or failed.
When enacomphcgettimestamp() returns an error, the timestamp parameter may contain uninitialized stack memory (e.g., when PHC is disabled or in blocked state) or invalid hardware values. Passing these to userspace via the PTP ioctl is both a security issue (information leak) and a correctness bug.
Fix by checking the return code after releasing the lock and only setting the output timestamp on success.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63837.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/24a08d7d6218d60c033015cf4870b6096446e734
- https://git.kernel.org/stable/c/bddf59818ae5102e6d82a4dae5add6df8da38fb0
- https://git.kernel.org/stable/c/edcb049d836e175e7b3d5e0d05657104545b5e65
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63837.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-63837
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git