CVE-2023-53285

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Add bounds checking to avoid\nreading beyond the end of allocated memory if this happens."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is reached through the local VFS write path (write \u2192 ext4_write_begin \u2192 ext4_try_to_write_inline_data \u2192 ext4_get_max_inline_size \u2192 get_max_inline_xattr_value_size) on a mounted ext4 volume; there is no network or remote-protocol entry point.\nAC:L - A crafted ext4 image (and, as the fix notes, inode-table corruption via attacker-controlled writes to the underlying loop/block device while mounted) deterministically drives the unbounded xattr walk; the attacker controls both the image and the triggering write with no uncontrollable race.\nPR:L - An unprivileged local user can mount an attacker-authored ext4 image via common desktop/kiosk loop-setup paths (e.g. udisks2 polkit allow_active) and then write to a file on that mount; real init-namespace root is not required.\nUI:N - In the loop/automount scenario the attacker performs the mount and the triggering write themselves; no separate victim action is required.\nS:U - The OOB read and any resulting oops remain inside the host kernel's ext4/VFS authority and do not cross a VM, IOMMU, or sandbox boundary.\nC:H - The unfixed walk follows EXT4_XATTR_NEXT without an end bound, so it performs an unbounded out-of-bounds read past the inode buffer into adjacent kernel heap (KASAN slab-OOB/UAF Read, including into freed objects such as skbuff), which scores Confidentiality High under OOB-read guidance.\nI:N - The vulnerable function only reads xattr entry headers to compute a size; the fixed defect is a pure OOB read with no OOB write, reclaimable UAF write, or other integrity/control-flow primitive.\nA:H - Reading past the inode allocation into invalid/freed memory produces a kernel oops (as in the syzbot KASAN 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Add bounds checking to avoid\nreading beyond the end of allocated memory if this happens."}], "id": "CVE-2023-53285", "lastModified": "2026-08-04T10:19:00.460", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-53285", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-01-14T18:09:24.423172Z", "version": "2.0.3"}}]}, "published": "2025-09-16T08:15:37.540", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1d2caddbeeee56fbbc36b428c5b909c3ad88eb7f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2220eaf90992c11d888fe771055d4de330385f01"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3d7b8fbcd2273e2b9f4c6de5ce2f4c0cd3cb1205"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4597554b4f7b29e7fd78aa449bab648f8da4ee2c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/486efbbc9445dca7890a1b86adbccb88b91284b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5a229d21b98d132673096710e8281ef522dab1d1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/88a06a94942c5c0a896e9da1113a6bb29e36cbef"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e780058bd75614b66882bc02620ddbd884171560"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f22b274429e88d3dc7e79d375b56ce4f2f59f0b4"}], "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: ext4: add bounds checking in get_max_inline_xattr_value_size()", "id": "2395666", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395666"}, "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": ["No description is available for this CVE."], "name": "CVE-2023-53285", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "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": "2025-09-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53285\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53285\nhttps://lore.kernel.org/linux-cve-announce/2025091625-CVE-2023-53285-7cb1@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-09-17T10:05:04.802095+00:00", "updated": "2025-09-17T10:05:04.802137+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}