8.8

CVE-2026-80724

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).
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 20503272422693d793b84f88bf23fe4e955d3a33
Version < 5b4f2bec7bea6c04084d720d731bedee7caf878d
Status affected
Version 20503272422693d793b84f88bf23fe4e955d3a33
Version < 3f5677d2f817355147337f0453174c7bb0f3b66a
Status affected
Version 20503272422693d793b84f88bf23fe4e955d3a33
Version < 2496e141827102d6af512950057d402a2cfb2bfc
Status affected
Version 20503272422693d793b84f88bf23fe4e955d3a33
Version < 2e596e7814ba38cdc129991058b6c254ed37cb11
Status affected
Version 20503272422693d793b84f88bf23fe4e955d3a33
Version < 0ce59c4148ecd1520c5592a63bb3c8991ee2d326
Status affected
Version 20503272422693d793b84f88bf23fe4e955d3a33
Version < a5edadbae57e2298a56cf7a4e774a027905a331f
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.13
Status affected
Version 0
Version < 6.13
Status unaffected
Version <= 6.18.*
Version 6.18.47
Status unaffected
Version <= 6.18.*
Version 6.18.50
Status unaffected
Version <= 7.1.*
Version 7.1.11
Status unaffected
Version <= 7.2.*
Version 7.2.1
Status unaffected
Version <= 7.2.*
Version 7.2.4
Status unaffected
Version <= *
Version 7.3-rc1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.019
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 8.8 2 6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/5b4f2bec7bea6c04084d720d731bedee7caf878d
https://git.kernel.org/stable/c/2496e141827102d6af512950057d402a2cfb2bfc
https://git.kernel.org/stable/c/2e596e7814ba38cdc129991058b6c254ed37cb11
https://git.kernel.org/stable/c/a5edadbae57e2298a56cf7a4e774a027905a331f
https://git.kernel.org/stable/c/0ce59c4148ecd1520c5592a63bb3c8991ee2d326
https://git.kernel.org/stable/c/3f5677d2f817355147337f0453174c7bb0f3b66a