{"id":"CVE-2025-21687","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/platform: check the bounds of read/write syscalls\n\ncount and offset are passed from user space and not checked, only\noffset is capped to 40 bits, which can be used…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/platform: check the bounds of read/write syscalls\n\ncount and offset are passed from user space and not checked, only\noffset is capped to 40 bits, which can be used…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-125","CWE-787"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.1, < 5.4.290","linux_kernel >= 5.5, < 5.10.234","linux_kernel >= 5.11, < 5.15.178","linux_kernel >= 5.16, < 6.1.128","linux_kernel >= 6.2, < 6.6.75","linux_kernel >= 6.7, < 6.12.12","linux_kernel = 6.13"],"patched":["linux_kernel 6.12.12"],"published":"2025-02-10","updated":"2026-07-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-21687","references":[{"url":"https://git.kernel.org/stable/c/1485932496a1b025235af8aa1e21988d6b7ccd54","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/665cfd1083866f87301bbd232cb8ba48dcf4acce","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6bcb8a5b70b80143db9bf12dfa7d53636f824d53","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/92340e6c5122d823ad064984ef7513eba9204048","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9377cdc118cf327248f1a9dde7b87de067681dc9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a20fcaa230f7472456d12cf761ed13938e320ac3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c981c32c38af80737a2fedc16e270546d139ccdd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ce9ff21ea89d191e477a02ad7eabf4f996b80a69","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d19a8650fd3d7aed8d1af1d9a77f979a8430eba1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ed81d82bb6e9df3a137f2c343ed689e6c68268ef","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f21636f24b6786c8b13f1af4319fa75ffcf17f38","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f65ce06387f8c1fb54bd59e18a8428248ec68eaf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00233,"epssPercentile":0.14492,"ingestedAt":"2026-07-30T06:53:09.213Z","slug":"CVE-2025-21687","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nvfio/platform: check the bounds of read/write syscalls\n\ncount and offset are passed from user space and not checked, only\noffset is capped to 40 bits, which can be used to read/write out of\nbounds of the device.\n\n## Affected\n\n- `linux_kernel >= 4.1, < 5.4.290`\n- `linux_kernel >= 5.5, < 5.10.234`\n- `linux_kernel >= 5.11, < 5.15.178`\n- `linux_kernel >= 5.16, < 6.1.128`\n- `linux_kernel >= 6.2, < 6.6.75`\n- `linux_kernel >= 6.7, < 6.12.12`\n- `linux_kernel = 6.13`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.12.12`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}