timers/itimer: Zero-init old itimerval before copy to userspace (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.20 % · percentile 10 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
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.
References
- https://git.kernel.org/stable/c/6d4b937251386d9c6f968e7802f0cb16a8523772
- https://git.kernel.org/stable/c/4ea70146ab9376092297eb8b622ef1792797f2cf
- https://git.kernel.org/stable/c/a17b345daff46fec4af9f1ecbdf350208016dd15
- https://git.kernel.org/stable/c/bdfda99c5763822a9a888e8af0ad7d9312ffcfe2
- https://git.kernel.org/stable/c/4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4
- https://git.kernel.org/stable/c/2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e
- https://git.kernel.org/stable/c/00ef529a5402f41eb1d227916437e237450719f9
- https://git.kernel.org/stable/c/18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8
European references
- ENISA EUVD · EUVD-2026-76677
- GCVE · GCVE-0-2026-89765
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1289 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1253 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6d4b937251386d9c6f968e7802f0cb16a8523772 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4ea70146ab9376092297eb8b622ef1792797f2cf ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a17b345daff46fec4af9f1ecbdf350208016dd15 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < bdfda99c5763822a9a888e8af0ad7d9312ffcfe2 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e |
| Linux · Linux | affected 2.6.12 ; unaffected 0 < 2.6.12 ; unaffected 5.10.270 ≤ 5.10.* ; unaffected 5.15.221 ≤ 5.15.* ; unaffected 6.1.188 ≤ 6.1.* ; unaffected 6.6.157 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |