{"id":"CVE-2026-72278","aliases":[],"url":"https://o3.security/vulnerability/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.","published":"2026-08-15T05:54:59.698Z","modified":"2026-08-18T03:56:55.444749759Z","cvss":{"score":9.3,"severity":"CRITICAL","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.18.40"}],"fix":null,"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T03:56:55.444749759Z"}}