CVE-2025-21830

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No network-facing consumer exists \u2014 NFS, SMB and FUSE clients all normalize or reject the invalid `S_IFMT` values before they reach an inode.\nAC:L - The attacker crafts the bcachefs/JFS/HFS+ image containing the weird-mode inode and drives the rename himself from a self-created Landlock domain, so the trigger is deterministic with no race, timing, or memory-layout dependency.\nPR:L - `landlock_create_ruleset()`/`landlock_restrict_self()` require no capability at all, and an ordinary desktop/kiosk console user can get an attacker-supplied image mounted through udisks2 removable-media automount without root; only a local unprivileged account is needed.\nUI:N - The attacker performs the entire sequence \u2014 supply the image, self-sandbox with Landlock, issue the rename or link \u2014 with no action required from another user.\nS:C - The fail-open `return 0` bypasses the Landlock sandbox boundary, letting a confined process act on filesystem resources that the sandbox policy placed under a separate security authority, consistent with the `S:C` treatment of the analogous Landlock refer-path bypass in CVE-2025-68736.\nC:N - No memory is read out of bounds and no kernel data is exposed; the anti-right-widening logic in `collect_domain_accesses()` uses the full `LANDLOCK_MASK_ACCESS_FS` and is unaffected, so no read rights are gained.\nI:L - Dropping the `LANDLOCK_ACCESS_FS_MAKE_*` requirement lets a sandboxed process create, link, or relocate weird-typed files into directories the policy protects, but the bypass is confined to same-mount operations on corrupt inodes and DAC still applies, so the unauthorized modification is limited.\nA:H - The path hits `WARN_ON_ONCE(1)`, which panics the kernel outright when `panic_on_warn` is set \u2014 the configuration under which syzbot reported this \u2014 giving a full denial of service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["security/landlock/fs.c"], "versions": [{"version": "cb2c7d1a1776057c9a1f48ed1250d85e94d4850d", "lessThan": "a1fccf6b72b56343dd4f2d96b008147f9951eebd", "status": "affected", "versionType": "git"}, {"version": "cb2c7d1a1776057c9a1f48ed1250d85e94d4850d", "lessThan": "7d6121228959ddf44a4b9b6a177384ac7854e2f9", "status": "affected", "versionType": "git"}, {"version": "cb2c7d1a1776057c9a1f48ed1250d85e94d4850d", "lessThan": "39bb3d56f1c351e76bb18895d0e73796e653d5c1", "status": "affected", "versionType": "git"}, {"version": "cb2c7d1a1776057c9a1f48ed1250d85e94d4850d", "lessThan": "2569e65d2eb6ac1afe6cb6dfae476afee8b6771a", "status": "affected", "versionType": "git"}, {"version": "cb2c7d1a1776057c9a1f48ed1250d85e94d4850d", "lessThan": "0fde195a373ab1267e60baa9e1a703a97e7464cd", "status": "affected", "versionType": "git"}, {"version": "cb2c7d1a1776057c9a1f48ed1250d85e94d4850d", "lessThan": "49440290a0935f428a1e43a5ac8dc275a647ff80", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["security/landlock/fs.c"], "versions": [{"version": "5.13", "status": "affected"}, {"version": "0", "lessThan": "5.13", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.179", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.129", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.76", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.13", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13.2", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.14", "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": "5.13", "versionEndExcluding": "5.15.179"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.1.129"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.6.76"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.12.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.13.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.14"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a1fccf6b72b56343dd4f2d96b008147f9951eebd"}, {"url": "https://git.kernel.org/stable/c/7d6121228959ddf44a4b9b6a177384ac7854e2f9"}, {"url": "https://git.kernel.org/stable/c/39bb3d56f1c351e76bb18895d0e73796e653d5c1"}, {"url": "https://git.kernel.org/stable/c/2569e65d2eb6ac1afe6cb6dfae476afee8b6771a"}, {"url": "https://git.kernel.org/stable/c/0fde195a373ab1267e60baa9e1a703a97e7464cd"}, {"url": "https://git.kernel.org/stable/c/49440290a0935f428a1e43a5ac8dc275a647ff80"}], "title": "landlock: Handle weird files", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T21:00:01.286Z"}}, {"x_adpType": "supplier", "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-10-15T01:04:37.308Z"}, "affected": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - 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No network-facing consumer exists \u2014 NFS, SMB and FUSE clients all normalize or reject the invalid `S_IFMT` values before they reach an inode.\nAC:L - The attacker crafts the bcachefs/JFS/HFS+ image containing the weird-mode inode and drives the rename himself from a self-created Landlock domain, so the trigger is deterministic with no race, timing, or memory-layout dependency.\nPR:L - `landlock_create_ruleset()`/`landlock_restrict_self()` require no capability at all, and an ordinary desktop/kiosk console user can get an attacker-supplied image mounted through udisks2 removable-media automount without root; only a local unprivileged account is needed.\nUI:N - The attacker performs the entire sequence \u2014 supply the image, self-sandbox with Landlock, issue the rename or link \u2014 with no action required from another user.\nS:C - The fail-open `return 0` bypasses the Landlock sandbox boundary, letting a confined process act on filesystem resources that the sandbox policy placed under a separate security authority, consistent with the `S:C` treatment of the analogous Landlock refer-path bypass in CVE-2025-68736.\nC:N - No memory is read out of bounds and no kernel data is exposed; the anti-right-widening logic in `collect_domain_accesses()` uses the full `LANDLOCK_MASK_ACCESS_FS` and is unaffected, so no read rights are gained.\nI:L - Dropping the `LANDLOCK_ACCESS_FS_MAKE_*` requirement lets a sandboxed process create, link, or relocate weird-typed files into directories the policy protects, but the bypass is confined to same-mount operations on corrupt inodes and DAC still applies, so the unauthorized modification is limited.\nA:H - The path hits `WARN_ON_ONCE(1)`, which panics the kernel outright when `panic_on_warn` is set \u2014 the configuration under which syzbot reported this \u2014 giving a full denial of service."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", 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"CVE-2025-21830", "state": "PUBLISHED", "dateUpdated": "2026-10-15T21:51:53.705Z", "dateReserved": "2024-12-29T08:45:45.776Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-03-06T16:08:09.894Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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En lugar de lanzar una advertencia y permitir el acceso a dichos archivos, tr\u00e1telos como archivos normales."}], "id": "CVE-2025-21830", "lastModified": "2026-10-15T22:18:09.603", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 4.7, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-21830", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T21:43:09.623797Z", "version": "2.0.3"}}]}, "published": "2025-03-06T17:15:22.943", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0fde195a373ab1267e60baa9e1a703a97e7464cd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2569e65d2eb6ac1afe6cb6dfae476afee8b6771a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/39bb3d56f1c351e76bb18895d0e73796e653d5c1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/49440290a0935f428a1e43a5ac8dc275a647ff80"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7d6121228959ddf44a4b9b6a177384ac7854e2f9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a1fccf6b72b56343dd4f2d96b008147f9951eebd"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: landlock: Handle weird files", "id": "2350405", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2350405"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-20", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nlandlock: Handle weird files\nA corrupted filesystem (e.g. bcachefs) might return weird files.\nInstead of throwing a warning and allowing access to such file, treat\nthem as regular files."], "name": "CVE-2025-21830", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-03-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-21830\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-21830\nhttps://lore.kernel.org/linux-cve-announce/2025030611-CVE-2025-21830-da64@gregkh/T"], "threat_severity": "Low"}

{}