{"id":"CVE-2026-93074","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-93074","summary":"dax/fsdev: use __va(phys) for kaddr in direct_access","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndax/fsdev: use __va(phys) for kaddr in direct_access\n\nUse __va(phys) instead of virt_addr + linear_offset for the kaddr\nreturn in __fsdev_dax_direct_access(). The previous code added a\ndevice-linear byte offset to virt_addr (which is __va of ranges[0]),\nbut for multi-range devices with physical gaps between ranges, this\nlinear arithmetic crosses the gap and produces a wrong kernel virtual\naddress. Using __va(phys) where phys comes from dax_pgoff_to_phys()\nis correct for any range layout because the direct map translates\neach physical address independently.\n\nThis leaves dev_dax->virt_addr write-only, so remove the field\n(suggested by Dave Jiang).","published":"2026-09-17T16:10:57.051Z","modified":"2026-09-19T03:47:27.878045411Z","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"7.2.6"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/7b642bd3d39105eef4d5908970726c5fda291b53"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ff7c73fca793bd5c29a15ba735b0886f62f3a840"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93074.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93074"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-19T03:47:27.878045411Z"}}