{ "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-2024-49903", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-49903", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-10-21T18:01:34.603Z", "updatedAt": "2026-10-15T00:54:22.753Z", "importedAt": "2026-10-24T01:57:16.009Z", "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: Fix uaf in dbFreeBits", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: Fix uaf in dbFreeBits\n\n[syzbot reported]\n==================================================================\nBUG: KASAN: slab-use-after-free in __mutex_lock_common kernel/locking/mutex.c:587 [inline]\nBUG: KASAN: slab-use-after-free in __mutex_lock+0xfe/0xd70 kernel/locking/mutex.c:752\nRead of size 8 at addr ffff8880229254b0 by task syz-executor357/5216\n\nCPU: 0 UID: 0 PID: 5216 Comm: syz-executor357 Not tainted 6.11.0-rc3-syzkaller-00156-gd7a5aa4b3c00 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024\nCall Trace:\n \n __dump_stack lib/dump_stack.c:93 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0x169/0x550 mm/kasan/report.c:488\n kasan_report+0x143/0x180 mm/kasan/report.c:601\n __mutex_lock_common kernel/locking/mutex.c:587 [inline]\n __mutex_lock+0xfe/0xd70 kernel/locking/mutex.c:752\n dbFreeBits+0x7ea/0xd90 fs/jfs/jfs_dmap.c:2390\n dbFreeDmap fs/jfs/jfs_dmap.c:2089 [inline]\n dbFree+0x35b/0x680 fs/jfs/jfs_dmap.c:409\n dbDiscardAG+0x8a9/0xa20 fs/jfs/jfs_dmap.c:1650\n jfs_ioc_trim+0x433/0x670 fs/jfs/jfs_discard.c:100\n jfs_ioctl+0x2d0/0x3e0 fs/jfs/ioctl.c:131\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:907 [inline]\n __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n\nFreed by task 5218:\n kasan_save_stack mm/kasan/common.c:47 [inline]\n kasan_save_track+0x3f/0x80 mm/kasan/common.c:68\n kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579\n poison_slab_object+0xe0/0x150 mm/kasan/common.c:240\n __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256\n kasan_slab_free include/linux/kasan.h:184 [inline]\n slab_free_hook mm/slub.c:2252 [inline]\n slab_free mm/slub.c:4473 [inline]\n kfree+0x149/0x360 mm/slub.c:4594\n dbUnmount+0x11d/0x190 fs/jfs/jfs_dmap.c:278\n jfs_mount_rw+0x4ac/0x6a0 fs/jfs/jfs_mount.c:247\n jfs_remount+0x3d1/0x6b0 fs/jfs/super.c:454\n reconfigure_super+0x445/0x880 fs/super.c:1083\n vfs_cmd_reconfigure fs/fsopen.c:263 [inline]\n vfs_fsconfig_locked fs/fsopen.c:292 [inline]\n __do_sys_fsconfig fs/fsopen.c:473 [inline]\n __se_sys_fsconfig+0xb6e/0xf80 fs/fsopen.c:345\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\n[Analysis]\nThere are two paths (dbUnmount and jfs_ioc_trim) that generate race\ncondition when accessing bmap, which leads to the occurrence of uaf.\n\nUse the lock s_umount to synchronize them, in order to avoid uaf caused\nby race condition.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "b40c2e665cd552eae5fbdbb878bc29a34357668e", "status": "affected", "versionType": "git", "lessThan": "4ac58f7734937f3249da734ede946dfb3b1af5e4" }, { "version": "b40c2e665cd552eae5fbdbb878bc29a34357668e", "status": "affected", "versionType": "git", "lessThan": "3126ccde51f51b0648c8cdccaf916e8bd062e972" }, { "version": "b40c2e665cd552eae5fbdbb878bc29a34357668e", "status": "affected", "versionType": "git", "lessThan": "fd026b6b6758d5569705c02540b40f3bbf822b9a" }, { "version": "b40c2e665cd552eae5fbdbb878bc29a34357668e", "status": "affected", "versionType": "git", "lessThan": "e7ae14f7ee76c6ef5a48aebab1a278ad78f42619" }, { "version": "b40c2e665cd552eae5fbdbb878bc29a34357668e", "status": "affected", "versionType": "git", "lessThan": "0c238da83f56bb895cab1e5851d034ac45b158d1" }, { "version": "b40c2e665cd552eae5fbdbb878bc29a34357668e", "status": "affected", "versionType": "git", "lessThan": "4218b31ecc7af7e191768d32e32ed4386d8f9b76" }, { "version": "b40c2e665cd552eae5fbdbb878bc29a34357668e", "status": "affected", "versionType": "git", "lessThan": "a9603a6f75df2fd8125cd208c98cfaa0fe3f7505" }, { "version": "b40c2e665cd552eae5fbdbb878bc29a34357668e", "status": "affected", "versionType": "git", "lessThan": "95accb7183badca387f7a8d19a2475cf3089f148" }, { "version": "b40c2e665cd552eae5fbdbb878bc29a34357668e", "status": "affected", "versionType": "git", "lessThan": "d6c1b3599b2feb5c7291f5ac3a36e5fa7cedb234" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.7", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.7" }, { "version": "4.19.323", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.285", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.227", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.168", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.113", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.55", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.10.14", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.10.*" }, { "version": "6.11.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.11.*" }, { "version": "6.12", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }