Description
In the Linux kernel, the following vulnerability has been resolved:
timers/itimer: Zero-init old itimerval before copy to userspace
On native sparc64, struct __kernel_old_timeval contains a four-byte hole after tv_usec because tv_sec is 64-bit while __kernel_suseconds_t is 32-bit. put_itimerval() fills only the named fields in a stack-allocated __kernel_old_itimerval and copies the entire object to userspace, so getitimer() can expose the two padding holes.
Zero-initialize the aggregate before assigning the fields so implicit padding is deterministic before it crosses the user/kernel boundary.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6d4b937251386d9c6f968e7802f0cb16a8523772; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 4ea70146ab9376092297eb8b622ef1792797f2cf; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a17b345daff46fec4af9f1ecbdf350208016dd15; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < bdfda99c5763822a9a888e8af0ad7d9312ffcfe2; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 00ef529a5402f41eb1d227916437e237450719f9; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8 |
| Linux | Linux | 2.6.12 |
References
- https://git.kernel.org/stable/c/00ef529a5402f41eb1d227916437e237450719f9
- https://git.kernel.org/stable/c/18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8
- https://git.kernel.org/stable/c/2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e
- https://git.kernel.org/stable/c/4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4
- https://git.kernel.org/stable/c/4ea70146ab9376092297eb8b622ef1792797f2cf
- https://git.kernel.org/stable/c/6d4b937251386d9c6f968e7802f0cb16a8523772
- https://git.kernel.org/stable/c/a17b345daff46fec4af9f1ecbdf350208016dd15
- https://git.kernel.org/stable/c/bdfda99c5763822a9a888e8af0ad7d9312ffcfe2
Timeline
- Published
- Sep 11, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received