{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40216", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.179Z", "datePublished": "2025-12-04T14:14:14.690Z", "dateUpdated": "2025-12-04T14:14:14.690Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-04T14:14:14.690Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/rsrc: don't rely on user vaddr alignment\n\nThere is no guaranteed alignment for user pointers, however the\ncalculation of an offset of the first page into a folio after coalescing\nuses some weird bit mask logic, get rid of it."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["io_uring/rsrc.c", "io_uring/rsrc.h"], "versions": [{"version": "a8edbb424b1391b077407c75d8f5d2ede77aa70d", "lessThan": "50998b0ae7d9d552e96d8b7239981cf05f65eff5", "status": "affected", "versionType": "git"}, {"version": "a8edbb424b1391b077407c75d8f5d2ede77aa70d", "lessThan": "f16769241594be59387b56ab525e327f54377e60", "status": "affected", "versionType": "git"}, {"version": "a8edbb424b1391b077407c75d8f5d2ede77aa70d", "lessThan": "3a3c6d61577dbb23c09df3e21f6f9eda1ecd634b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["io_uring/rsrc.c", "io_uring/rsrc.h"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.36", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15.5", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.12.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.15.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.16"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/50998b0ae7d9d552e96d8b7239981cf05f65eff5"}, {"url": "https://git.kernel.org/stable/c/f16769241594be59387b56ab525e327f54377e60"}, {"url": "https://git.kernel.org/stable/c/3a3c6d61577dbb23c09df3e21f6f9eda1ecd634b"}], "title": "io_uring/rsrc: don't rely on user vaddr alignment", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/rsrc: don't rely on user vaddr alignment\n\nThere is no guaranteed alignment for user pointers, however the\ncalculation of an offset of the first page into a folio after coalescing\nuses some weird bit mask logic, get rid of it."}], "id": "CVE-2025-40216", "lastModified": "2025-12-04T17:15:08.283", "metrics": {}, "published": "2025-12-04T15:15:57.300", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3a3c6d61577dbb23c09df3e21f6f9eda1ecd634b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/50998b0ae7d9d552e96d8b7239981cf05f65eff5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f16769241594be59387b56ab525e327f54377e60"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: io_uring/rsrc: don't rely on user vaddr alignment", "id": "2418801", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2418801"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nio_uring/rsrc: don't rely on user vaddr alignment\nThere is no guaranteed alignment for user pointers, however the\ncalculation of an offset of the first page into a folio after coalescing\nuses some weird bit mask logic, get rid of it."], "name": "CVE-2025-40216", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40216\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40216\nhttps://lore.kernel.org/linux-cve-announce/2025120417-CVE-2025-40216-d79f@gregkh/T"], "threat_severity": "Moderate"}