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f2fs_data_blkaddr fs/f2fs/f2fs.h:3058 [inline]\n f2fs_get_dnode_of_data+0x1a09/0x1c40 fs/f2fs/node.c:855\n f2fs_reserve_block+0x53/0x310 fs/f2fs/data.c:1195\n prepare_write_begin fs/f2fs/data.c:3395 [inline]\n f2fs_write_begin+0xf39/0x2190 fs/f2fs/data.c:3594\n generic_perform_write+0x2c7/0x910 mm/filemap.c:4112\n f2fs_buffered_write_iter fs/f2fs/file.c:4988 [inline]\n f2fs_file_write_iter+0x1ec8/0x2410 fs/f2fs/file.c:5216\n new_sync_write fs/read_write.c:593 [inline]\n vfs_write+0x546/0xa90 fs/read_write.c:686\n ksys_write+0x149/0x250 fs/read_write.c:738\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xf3/0x3d0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is in the corrupted image, there is a dnode has the same\nnode id w/ its inode, so during f2fs_get_dnode_of_data(), it tries to\naccess block address in dnode at offset 934, however it parses the dnode\nas inode node, so that get_dnode_addr() returns 360, then 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lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x1c1/0x2a0 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:378 [inline]\n print_report+0x17e/0x800 mm/kasan/report.c:480\n kasan_report+0x147/0x180 mm/kasan/report.c:593\n data_blkaddr fs/f2fs/f2fs.h:3053 [inline]\n f2fs_data_blkaddr fs/f2fs/f2fs.h:3058 [inline]\n f2fs_get_dnode_of_data+0x1a09/0x1c40 fs/f2fs/node.c:855\n f2fs_reserve_block+0x53/0x310 fs/f2fs/data.c:1195\n prepare_write_begin fs/f2fs/data.c:3395 [inline]\n f2fs_write_begin+0xf39/0x2190 fs/f2fs/data.c:3594\n generic_perform_write+0x2c7/0x910 mm/filemap.c:4112\n f2fs_buffered_write_iter fs/f2fs/file.c:4988 [inline]\n f2fs_file_write_iter+0x1ec8/0x2410 fs/f2fs/file.c:5216\n new_sync_write fs/read_write.c:593 [inline]\n vfs_write+0x546/0xa90 fs/read_write.c:686\n ksys_write+0x149/0x250 fs/read_write.c:738\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xf3/0x3d0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is in the corrupted image, there is a dnode has the same\nnode id w/ its inode, so during f2fs_get_dnode_of_data(), it tries to\naccess block address in dnode at offset 934, however it parses the dnode\nas inode node, so that get_dnode_addr() returns 360, then it tries to\naccess page address from 360 + 934 * 4 = 4096 w/ 4 bytes.\n\nTo fix this issue, let's add sanity check for node id of all direct nodes\nduring f2fs_get_dnode_of_data()."}], "id": "CVE-2025-38677", "lastModified": "2026-05-12T13:16:53.907", "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, 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{"bugzilla": {"description": "kernel: f2fs: fix to avoid out-of-boundary access in dnode page", "id": "2392113", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2392113"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nf2fs: fix to avoid out-of-boundary access in dnode page\nAs Jiaming Zhang reported:\n<TASK>\n__dump_stack lib/dump_stack.c:94 [inline]\ndump_stack_lvl+0x1c1/0x2a0 lib/dump_stack.c:120\nprint_address_description mm/kasan/report.c:378 [inline]\nprint_report+0x17e/0x800 mm/kasan/report.c:480\nkasan_report+0x147/0x180 mm/kasan/report.c:593\ndata_blkaddr fs/f2fs/f2fs.h:3053 [inline]\nf2fs_data_blkaddr fs/f2fs/f2fs.h:3058 [inline]\nf2fs_get_dnode_of_data+0x1a09/0x1c40 fs/f2fs/node.c:855\nf2fs_reserve_block+0x53/0x310 fs/f2fs/data.c:1195\nprepare_write_begin fs/f2fs/data.c:3395 [inline]\nf2fs_write_begin+0xf39/0x2190 fs/f2fs/data.c:3594\ngeneric_perform_write+0x2c7/0x910 mm/filemap.c:4112\nf2fs_buffered_write_iter fs/f2fs/file.c:4988 [inline]\nf2fs_file_write_iter+0x1ec8/0x2410 fs/f2fs/file.c:5216\nnew_sync_write fs/read_write.c:593 [inline]\nvfs_write+0x546/0xa90 fs/read_write.c:686\nksys_write+0x149/0x250 fs/read_write.c:738\ndo_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\ndo_syscall_64+0xf3/0x3d0 arch/x86/entry/syscall_64.c:94\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\nThe root cause is in the corrupted image, there is a dnode has the same\nnode id w/ its inode, so during f2fs_get_dnode_of_data(), it tries to\naccess block address in dnode at offset 934, however it parses the dnode\nas inode node, so that get_dnode_addr() returns 360, then it tries to\naccess page address from 360 + 934 * 4 = 4096 w/ 4 bytes.\nTo fix this issue, let's add sanity check for node id of all direct nodes\nduring f2fs_get_dnode_of_data()."], "name": "CVE-2025-38677", "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": "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": "2025-08-30T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38677\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38677\nhttps://lore.kernel.org/linux-cve-announce/2025083005-CVE-2025-38677-e495@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-09-02T15:23:28.902121+00:00", "updated": "2025-09-02T15:23:28.902175+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}