Answer in brief
CVE-2026-89765 records a Unknown severity vulnerability in timers/itimer: Zero-init old itimerval before copy to userspace. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <00ef529a5402f41eb1d227916437e237450719f9 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8 || >=0 <6.12.109 || >=0 <6.18.50 || >=0 <7.2.4 | 4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4, 2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e, 00ef529a5402f41eb1d227916437e237450719f9, 18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8, 6.12.109, 6.18.50, 7.2.4 |
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <00ef529a5402f41eb1d227916437e237450719f9 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8 | 4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4, 2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e, 00ef529a5402f41eb1d227916437e237450719f9, 18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6d4b937251386d9c6f968e7802f0cb16a8523772 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4ea70146ab9376092297eb8b622ef1792797f2cf || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a17b345daff46fec4af9f1ecbdf350208016dd15 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bdfda99c5763822a9a888e8af0ad7d9312ffcfe2 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <00ef529a5402f41eb1d227916437e237450719f9 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8 | 6d4b937251386d9c6f968e7802f0cb16a8523772, 4ea70146ab9376092297eb8b622ef1792797f2cf, a17b345daff46fec4af9f1ecbdf350208016dd15, bdfda99c5763822a9a888e8af0ad7d9312ffcfe2, 4c66719dd1e4023c5e3f7d050f1bbefec3dfbeb4, 2bf5e8f7c9bf4ad3be343a9a6e3e50a34264d25e, 00ef529a5402f41eb1d227916437e237450719f9, 18c7d85864e554adc8fad1e8d2e9d2cb6c3911c8 |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.