{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-37739", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-37739", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-05-01T12:55:48.616Z", "updatedAt": "2026-05-11T21:14:13.683Z", "importedAt": "2026-10-24T01:57:34.152Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "f2fs: fix to avoid out-of-bounds access in f2fs_truncate_inode_blocks()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid out-of-bounds access in f2fs_truncate_inode_blocks()\n\nsyzbot reports an UBSAN issue as below:\n\n------------[ cut here ]------------\nUBSAN: array-index-out-of-bounds in fs/f2fs/node.h:381:10\nindex 18446744073709550692 is out of range for type '__le32[5]' (aka 'unsigned int[5]')\nCPU: 0 UID: 0 PID: 5318 Comm: syz.0.0 Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #0\nCall Trace:\n \n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120\n ubsan_epilogue lib/ubsan.c:231 [inline]\n __ubsan_handle_out_of_bounds+0x121/0x150 lib/ubsan.c:429\n get_nid fs/f2fs/node.h:381 [inline]\n f2fs_truncate_inode_blocks+0xa5e/0xf60 fs/f2fs/node.c:1181\n f2fs_do_truncate_blocks+0x782/0x1030 fs/f2fs/file.c:808\n f2fs_truncate_blocks+0x10d/0x300 fs/f2fs/file.c:836\n f2fs_truncate+0x417/0x720 fs/f2fs/file.c:886\n f2fs_file_write_iter+0x1bdb/0x2550 fs/f2fs/file.c:5093\n aio_write+0x56b/0x7c0 fs/aio.c:1633\n io_submit_one+0x8a7/0x18a0 fs/aio.c:2052\n __do_sys_io_submit fs/aio.c:2111 [inline]\n __se_sys_io_submit+0x171/0x2e0 fs/aio.c:2081\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7f238798cde9\n\nindex 18446744073709550692 (decimal, unsigned long long)\n= 0xfffffffffffffc64 (hexadecimal, unsigned long long)\n= -924 (decimal, long long)\n\nIn f2fs_truncate_inode_blocks(), UBSAN detects that get_nid() tries to\naccess .i_nid[-924], it means both offset[0] and level should zero.\n\nThe possible case should be in f2fs_do_truncate_blocks(), we try to\ntruncate inode size to zero, however, dn.ofs_in_node is zero and\ndn.node_page is not an inode page, so it fails to truncate inode page,\nand then pass zeroed free_from to f2fs_truncate_inode_blocks(), result\nin this issue.\n\n\tif (dn.ofs_in_node || IS_INODE(dn.node_page)) {\n\t\tf2fs_truncate_data_blocks_range(&dn, count);\n\t\tfree_from += count;\n\t}\n\nI guess the reason why dn.node_page is not an inode page could be: there\nare multiple nat entries share the same node block address, once the node\nblock address was reused, f2fs_get_node_page() may load a non-inode block.\n\nLet's add a sanity check for such condition to avoid out-of-bounds access\nissue.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4", "status": "affected", "versionType": "git", "lessThan": "a67e1bf03c609a751d1740a1789af25e599966fa" }, { "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4", "status": "affected", "versionType": "git", "lessThan": "67e16ccba74dd8de0a7b10062f1e02d77432f573" }, { "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4", "status": "affected", "versionType": "git", "lessThan": "98dbf2af63de0b551082c9bc48333910e009b09f" }, { "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4", "status": "affected", "versionType": "git", "lessThan": "8b5e5aac44fee122947a269f9034c048e4c295de" }, { "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4", "status": "affected", "versionType": "git", "lessThan": "ecc461331604b07cdbdb7360dbdf78471653264c" }, { "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4", "status": "affected", "versionType": "git", "lessThan": "d7242fd7946d4cba0411effb6b5048ca55125747" }, { "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4", "status": "affected", "versionType": "git", "lessThan": "6ba8b41d0aa4b82f90f0c416cb53fcef9696525d" }, { "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4", "status": "affected", "versionType": "git", "lessThan": "e6494977bd4a83862118a05f57a8df40256951c0" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.8", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.8" }, { "version": "5.10.237", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.181", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.135", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.88", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.24", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.13.12", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.13.*" }, { "version": "6.14.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.14.*" }, { "version": "6.15", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }