In the Linux kernel, the following vulnerability has been resolved: KVM:
x86/mmu: Write-protect L2 SPTEs in TDP MMU when clearing dirty status Check
kvm_mmu_page_ad_need_write_protect() when deciding whether to write-protect
or clear D-bits on TDP MMU SPTEs, so that the TDP MMU accounts for any
role-specific reasons for disabling D-bit dirty logging. Specifically, TDP
MMU SPTEs must be write-protected when the TDP MMU is being used to run an
L2 (i.e. L1 has disabled EPT) and PML is enabled. KVM always disables PML
when running L2, even when L1 and L2 GPAs are in the some domain, so
failing to write-protect TDP MMU SPTEs will cause writes made by L2 to not
be reflected in the dirty log. [sean: massage shortlog and changelog, tweak
ternary op formatting]
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 24.04 | noarch | linux | < 6.8.0-38.38 | UNKNOWN |
ubuntu | 24.04 | noarch | linux-aws | < 6.8.0-1011.12 | UNKNOWN |
ubuntu | 22.04 | noarch | linux-aws-6.5 | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-azure | < 6.8.0-1010.10 | UNKNOWN |
ubuntu | 22.04 | noarch | linux-azure-6.5 | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-gcp | < 6.8.0-1010.11 | UNKNOWN |
ubuntu | 22.04 | noarch | linux-gcp-6.5 | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-gke | < 6.8.0-1006.9 | UNKNOWN |
ubuntu | 24.04 | noarch | linux-ibm | < 6.8.0-1008.8 | UNKNOWN |
ubuntu | 24.04 | noarch | linux-intel | < 6.8.0-1007.14 | UNKNOWN |
git.kernel.org/linus/2673dfb591a359c75080dd5af3da484b89320d22 (6.9-rc5)
git.kernel.org/stable/c/2673dfb591a359c75080dd5af3da484b89320d22
git.kernel.org/stable/c/cdf811a937471af2d1facdf8ae80e5e68096f1ed
git.kernel.org/stable/c/e20bff0f1b2de9cfe303dd35ff46470104a87404
launchpad.net/bugs/cve/CVE-2024-26990
nvd.nist.gov/vuln/detail/CVE-2024-26990
security-tracker.debian.org/tracker/CVE-2024-26990
ubuntu.com/security/notices/USN-6893-1
ubuntu.com/security/notices/USN-6893-2
ubuntu.com/security/notices/USN-6893-3
ubuntu.com/security/notices/USN-6918-1
www.cve.org/CVERecord?id=CVE-2024-26990