{"id":"CVE-2026-72278","summary":"KVM: arm64: nv: Re-translate VNCR before injecting abort","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: nv: Re-translate VNCR before injecting abort\n\nKVM faults in the VNCR page with FOLL_WRITE whenever the guest aborts\nfor a write, similar to how a regular stage-2 mapping is handled. It is\nentirely possible that the guest reads from the VNCR before writing to\nit, in which case the PFN could only be read-only.\n\nInvalidate the VNCR TLB and re-fetch the translation upon taking a VNCR\nabort, allowing the host mapping to be faulted in for write the second\ntime around. Interestingly enough, this also satisfies the ordering\nrequirements of FEAT_ETS2/3 between descriptor updates and MMU faults.","modified":"2026-08-16T03:48:39.344917410Z","published":"2026-08-15T05:54:59.698Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72278.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0a5dd8cf4d58ea28da132c2097cd1c525302ac48"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bb645aa0a4caeaf7f9cd32e9a948594d434c1a8f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ea7a76d7d614b5f82b4d0785f9af3550e860a71a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72278.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72278"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2a359e072596fcb2e9e85017a865e3618a2fe5b5"},{"fixed":"ea7a76d7d614b5f82b4d0785f9af3550e860a71a"},{"fixed":"0a5dd8cf4d58ea28da132c2097cd1c525302ac48"},{"fixed":"bb645aa0a4caeaf7f9cd32e9a948594d434c1a8f"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72278.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.16.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72278.json"}}],"schema_version":"1.9.0"}