CVE-2026-64282: KVM: arm64: Don't leak PFN when kvm_translate_vncr() races MMU notifier
Greg Kroah-Hartman <[email protected]> Sat, 25 Jul 2026 10:48:19 +0200
| Newsgroups | org.kernel.vger.linux-cve-announce |
|---|---|
| Message-ID | <2026072502-CVE-2026-64282-842c@gregkh> |
From: Greg Kroah-Hartman <[email protected]> Description =========== In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Don't leak PFN when kvm_translate_vncr() races MMU notifier In the case that kvm_translate_vncr() races with an MMU notifier the early return does not release a reference on the faulted in PFN. Add the necessary call to kvm_release_faultin_page() for the unused PFN. The Linux kernel CVE team has assigned CVE-2026-64282 to this issue. Affected and fixed versions =========================== Issue introduced in 6.16 with commit 069a05e53549685d2b5e54ceb51db1fd04aa50d7 and fixed in 6.18.39 with commit 0c93681aea0a1b8be14730a88abe77c840272e41 Issue introduced in 6.16 with commit 069a05e53549685d2b5e54ceb51db1fd04aa50d7 and fixed in 7.1.4 with commit cd1067ccc0dbc18890a74db116d00a4bc3c7f2f7 Issue introduced in 6.16 with commit 069a05e53549685d2b5e54ceb51db1fd04aa50d7 and fixed in 7.2-rc1 with commit 9f76b039a72d7e06374aa96862f0232ed53f7787 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-64282 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: arch/arm64/kvm/nested.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/0c93681aea0a1b8be14730a88abe77c840272e41 https://git.kernel.org/stable/c/cd1067ccc0dbc18890a74db116d00a4bc3c7f2f7 https://git.kernel.org/stable/c/9f76b039a72d7e06374aa96862f0232ed53f7787