CVE-2026-80724
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ptp: vmclock: prevent read-only mappings from becoming writable
In the Linux kernel, the following vulnerability has been resolved: ptp: vmclock: prevent read-only mappings from becoming writable vmclock_miscdev_mmap() rejects writable mappings of the shared vmclock ABI page with -EROFS, but leaves VM_MAYWRITE set. Userspace can map the page read-only and then upgrade it to writable with mprotect(), after which the guest can corrupt the host-written timekeeping data (sequence counter, UTC time, TSC offset) that the vmclock ABI defines as read-only. Clear VM_MAYWRITE on the read-only path so the mapping cannot be upgraded, as i915 does for its read-only objects and as fixed in drm/vc4 (CVE-2026-68445) and drm/panthor (CVE-2024-53071).
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 20503272422693d793b84f88bf23fe4e955d3a33 | affected | git | 5b4f2bec7bea6c04084d720d731bedee7caf878d | Unavailable | None listed |
| 20503272422693d793b84f88bf23fe4e955d3a33 | affected | git | 3f5677d2f817355147337f0453174c7bb0f3b66a | Unavailable | None listed |
| 20503272422693d793b84f88bf23fe4e955d3a33 | affected | git | 2496e141827102d6af512950057d402a2cfb2bfc | Unavailable | None listed |
| 20503272422693d793b84f88bf23fe4e955d3a33 | affected | git | 2e596e7814ba38cdc129991058b6c254ed37cb11 | Unavailable | None listed |
| 20503272422693d793b84f88bf23fe4e955d3a33 | affected | git | 0ce59c4148ecd1520c5592a63bb3c8991ee2d326 | Unavailable | None listed |
| 20503272422693d793b84f88bf23fe4e955d3a33 | affected | git | a5edadbae57e2298a56cf7a4e774a027905a331f | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.13 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.13 | Unavailable | None listed |
| 6.18.47 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.18.50 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.11 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2.1 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.2.4 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |