7.8
HighCVSS 3.1 · from Linux
CVE-2026-99177
KVM: SEV: Fix page dirtying in sev_gmem_post_populate()
LinuxAffectedLinux, Linux
FixUpdate to 184382f9852d433af21de96c334ecf43b8414ed8, 97818b2fa7082e940ddd36dab12a68615300e798, 0, 7.2.13 or newer
PublishedOct 28, 10:35 · Linux
ScoredOct 28 · 7.8 · Linux
Exploit code publicNone known · checked 01:19 UTC
ExploitedNone known · CISA KEV checked 01:57 UTC
What we know
No known exploitation. CISA KEV, checked 01:57 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 01:19 UTC.
An attacker needs local access to the machine. CVSS: local.
A successful attack can read and change data and take the service down. CVSS: high impact on confidentiality, integrity and availability.
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Fix page dirtying in sev_gmem_post_populate() set_page_dirty() requires that the caller holds some kind of lock to ensure that the page's mapping does not concurrently go away. That is not the case for a random page we got from get_user_pages_fast(), so use set_page_dirty_lock(). [sean: tag for stable]
From Linux
Affected and fixed versions
ProductAffectedFixed inLinux97cd21d57e9bd2da79845178d9250cfd19289cd4 – before 184382f9852d433af21de96c334ecf43b8414ed8184382f9852d433af21de96c334ecf43b8414ed8Linux97cd21d57e9bd2da79845178d9250cfd19289cd4 – before 97818b2fa7082e940ddd36dab12a68615300e79897818b2fa7082e940ddd36dab12a68615300e798Linux7.2–LinuxNot affected0LinuxNot affected7.2.13LinuxNot affected7.3
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known