{ "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-2022-50782", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50782", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-12-24T13:06:09.914Z", "updatedAt": "2026-05-11T19:25:26.436Z", "importedAt": "2026-10-24T01:56:49.724Z", "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": "ext4: fix bug_on in __es_tree_search caused by bad quota inode", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix bug_on in __es_tree_search caused by bad quota inode\n\nWe got a issue as fllows:\n==================================================================\n kernel BUG at fs/ext4/extents_status.c:202!\n invalid opcode: 0000 [#1] PREEMPT SMP\n CPU: 1 PID: 810 Comm: mount Not tainted 6.1.0-rc1-next-g9631525255e3 #352\n RIP: 0010:__es_tree_search.isra.0+0xb8/0xe0\n RSP: 0018:ffffc90001227900 EFLAGS: 00010202\n RAX: 0000000000000000 RBX: 0000000077512a0f RCX: 0000000000000000\n RDX: 0000000000000002 RSI: 0000000000002a10 RDI: ffff8881004cd0c8\n RBP: ffff888177512ac8 R08: 47ffffffffffffff R09: 0000000000000001\n R10: 0000000000000001 R11: 00000000000679af R12: 0000000000002a10\n R13: ffff888177512d88 R14: 0000000077512a10 R15: 0000000000000000\n FS: 00007f4bd76dbc40(0000)GS:ffff88842fd00000(0000)knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00005653bf993cf8 CR3: 000000017bfdf000 CR4: 00000000000006e0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n \n ext4_es_cache_extent+0xe2/0x210\n ext4_cache_extents+0xd2/0x110\n ext4_find_extent+0x5d5/0x8c0\n ext4_ext_map_blocks+0x9c/0x1d30\n ext4_map_blocks+0x431/0xa50\n ext4_getblk+0x82/0x340\n ext4_bread+0x14/0x110\n ext4_quota_read+0xf0/0x180\n v2_read_header+0x24/0x90\n v2_check_quota_file+0x2f/0xa0\n dquot_load_quota_sb+0x26c/0x760\n dquot_load_quota_inode+0xa5/0x190\n ext4_enable_quotas+0x14c/0x300\n __ext4_fill_super+0x31cc/0x32c0\n ext4_fill_super+0x115/0x2d0\n get_tree_bdev+0x1d2/0x360\n ext4_get_tree+0x19/0x30\n vfs_get_tree+0x26/0xe0\n path_mount+0x81d/0xfc0\n do_mount+0x8d/0xc0\n __x64_sys_mount+0xc0/0x160\n do_syscall_64+0x35/0x80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n \n==================================================================\n\nAbove issue may happen as follows:\n-------------------------------------\next4_fill_super\n ext4_orphan_cleanup\n ext4_enable_quotas\n ext4_quota_enable\n ext4_iget --> get error inode <5>\n ext4_ext_check_inode --> Wrong imode makes it escape inspection\n make_bad_inode(inode) --> EXT4_BOOT_LOADER_INO set imode\n dquot_load_quota_inode\n vfs_setup_quota_inode --> check pass\n dquot_load_quota_sb\n v2_check_quota_file\n v2_read_header\n ext4_quota_read\n ext4_bread\n ext4_getblk\n ext4_map_blocks\n ext4_ext_map_blocks\n ext4_find_extent\n ext4_cache_extents\n ext4_es_cache_extent\n __es_tree_search.isra.0\n ext4_es_end --> Wrong extents trigger BUG_ON\n\nIn the above issue, s_usr_quota_inum is set to 5, but inode<5> contains\nincorrect imode and disordered extents. Because 5 is EXT4_BOOT_LOADER_INO,\nthe ext4_ext_check_inode check in the ext4_iget function can be bypassed,\nfinally, the extents that are not checked trigger the BUG_ON in the\n__es_tree_search function. To solve this issue, check whether the inode is\nbad_inode in vfs_setup_quota_inode().", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "393d1d1d76933886d5e1ce603214c9987589c6d5", "status": "affected", "versionType": "git", "lessThan": "fb1d3b4107b4837b4a0dbbf01954269bd6acfdc3" }, { "version": "393d1d1d76933886d5e1ce603214c9987589c6d5", "status": "affected", "versionType": "git", "lessThan": "1d5524832ff204b8a8cd54ae1628b2122f6e9a8d" }, { "version": "393d1d1d76933886d5e1ce603214c9987589c6d5", "status": "affected", "versionType": "git", "lessThan": "98004f926d27eaccdd2d336b7916a42e07392da1" }, { "version": "393d1d1d76933886d5e1ce603214c9987589c6d5", "status": "affected", "versionType": "git", "lessThan": "0dcbf4dc3d54aab5990952cfd832042fb300dbe3" }, { "version": "393d1d1d76933886d5e1ce603214c9987589c6d5", "status": "affected", "versionType": "git", "lessThan": "794c9175db1f2e5d2a28c326f10bd024dbd944f8" }, { "version": "393d1d1d76933886d5e1ce603214c9987589c6d5", "status": "affected", "versionType": "git", "lessThan": "1daff79463d7d76096c84c57cddc30c5d4be2226" }, { "version": "393d1d1d76933886d5e1ce603214c9987589c6d5", "status": "affected", "versionType": "git", "lessThan": "d323877484765aaacbb2769b06e355c2041ed115" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.10", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.10" }, { "version": "4.19.270", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.229", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.163", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.87", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.0.18", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.0.*" }, { "version": "6.1.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }