PatchTheCVECVE-2026-64289: In the Linux kernel, the following vulnerability has been resolved: iommufd: Set upper bounds on cache invali
CVE-2026-64289 is a medium-severity flaw (CVSS 5.5) affecting linux kernel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In the Linux kernel, the following vulnerability has been resolved: iommufd: Set upper bounds on cache invalidation entry_num and entry_len iommufd_hwpt_invalidate() takes a user-controlled entry_num and entry_len, each bounded only by U32_MAX. An entry_len beyond the kernel's struct size makes the copy helper verify the extra bytes are zero, scanning that excess in one uninterruptible pass; a multi-gigabyte value over zeroed user memory trips
Why this priority
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.5 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 95%) |
| CISA exploited list | No |
| Published | 2026-07-25 |
| Last modified | 2026-08-17 |
Last updated 2026-08-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-64289?
linux kernel: upgrade to 6.12.96, 6.18.39, 7.1.4. Exact commands for each OS are on this page.
Is CVE-2026-64289 being exploited?
CVE-2026-64289 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-64289 affect?
CVE-2026-64289 affects linux kernel. Severity is medium (CVSS 5.5). In the Linux kernel, the following vulnerability has been resolved: iommufd: Set upper bounds on cache invalidation entry_num and entry_len iommufd_hwpt_invalidate() takes a user-controlled entry_num and entry_len, each bounded only by U3
How urgent is CVE-2026-64289?
Priority 26/100. On your watchlist
Software pages
Related CVEs
- CVE-2026-63938 CRITICAL 9.3 UPGRADE In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Check PSC request indices again
- CVE-2026-63937 HIGH 8.8 UPGRADE In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Use READ_ONCE() when reading en
- CVE-2026-63927 HIGH 7.8 UPGRADE In the Linux kernel, the following vulnerability has been resolved: usb: dwc2: Fix use after free in debug co
- CVE-2026-63925 HIGH 8.1 UPGRADE In the Linux kernel, the following vulnerability has been resolved: macsec: fix replay protection at XPN lowe
- CVE-2026-63923 HIGH 8.8 UPGRADE In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: validate body pcifunc in rv