{ "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-2025-38230", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-38230", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-07-04T13:37:44.264Z", "updatedAt": "2026-08-05T12:00:31.185Z", "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": "jfs: validate AG parameters in dbMount() to prevent crashes", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: validate AG parameters in dbMount() to prevent crashes\n\nValidate db_agheight, db_agwidth, and db_agstart in dbMount to catch\ncorrupted metadata early and avoid undefined behavior in dbAllocAG.\nLimits are derived from L2LPERCTL, LPERCTL/MAXAG, and CTLTREESIZE:\n\n- agheight: 0 to L2LPERCTL/2 (0 to 5) ensures shift\n (L2LPERCTL - 2*agheight) >= 0.\n- agwidth: 1 to min(LPERCTL/MAXAG, 2^(L2LPERCTL - 2*agheight))\n ensures agperlev >= 1.\n - Ranges: 1-8 (agheight 0-3), 1-4 (agheight 4), 1 (agheight 5).\n - LPERCTL/MAXAG = 1024/128 = 8 limits leaves per AG;\n 2^(10 - 2*agheight) prevents division to 0.\n- agstart: 0 to CTLTREESIZE-1 - agwidth*(MAXAG-1) keeps ti within\n stree (size 1365).\n - Ranges: 0-1237 (agwidth 1), 0-348 (agwidth 8).\n\nUBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:1400:9\nshift exponent -335544310 is negative\nCPU: 0 UID: 0 PID: 5822 Comm: syz-executor130 Not tainted 6.14.0-rc5-syzkaller #0\nHardware name: Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025\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_shift_out_of_bounds+0x3c8/0x420 lib/ubsan.c:468\n dbAllocAG+0x1087/0x10b0 fs/jfs/jfs_dmap.c:1400\n dbDiscardAG+0x352/0xa20 fs/jfs/jfs_dmap.c:1613\n jfs_ioc_trim+0x45a/0x6b0 fs/jfs/jfs_discard.c:105\n jfs_ioctl+0x2cd/0x3e0 fs/jfs/ioctl.c:131\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:906 [inline]\n __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892\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\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "95ae5ee6069d9a5945772625f289422ef659221a" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "a4259e72363e1ea204a97292001a9fc36c7e52fd" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "c3705c82b7406a15ef38a610d03bf6baa43d6e0c" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "9242ff6245527a3ebb693ddd175493b38ddca72f" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "0c40fa81f850556e9aa0185fede9ef1112db7b39" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "8b69608c6b6779a7ab07ce4467a56df90152cfb9" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "b62a1e59d8716bbd2e73660743fe06acc97ed7d1" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "37bfb464ddca87f203071b5bd562cd91ddc0b40a" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.12" }, { "version": "5.4.296", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.240", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.187", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.143", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.96", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.36", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.15.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.15.*" }, { "version": "6.16", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }