CVE-2025-38697

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issuing FITRIM); no victim action is required at any point in the exploit.\nS:U - The out-of-bounds accesses and the resulting corruption stay within kernel memory and the kernel's own security authority; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The unchecked index grows geometrically through the descent (1237 \u2192 ~1,267,029), reading kernel memory up to ~1.2 MB past a 4 KB page-cache page, and the bytes read select the returned block number that JFS records in the file's extent map \u2014 recoverable via FIEMAP/FIBMAP as a repeatable kernel-memory disclosure oracle.\nI:H - The attacker-steered index propagates into `blkno` and on into `dbAllocCtl()`/`dbAllocDmap()`/`dbAdjCtl()`, so out-of-bounds kernel data is written into allocation bitmaps, dmapctl trees, and file extents at attacker-influenced offsets, corrupting filesystem state.\nA:H - Reading roughly a megabyte beyond the page-cache page routinely hits unmapped memory or KASAN redzones, producing a general 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{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c214006856ff52a8ff17ed8da52d50601d54f9ce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c8ca21a2836993d7cb816668458e05e598574e55"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-129"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: jfs: upper bound check of tree index in dbAllocAG", "id": "2393182", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2393182"}, "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-2025-38697", "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": "Out of support scope", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38697\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38697\nhttps://lore.kernel.org/linux-cve-announce/2025090451-CVE-2025-38697-b37e@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-09-05T14:02:52.392590+00:00", "updated": "2025-09-05T14:02:52.392670+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}