{ "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-2022-49349", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49349", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-02-26T02:11:02.993Z", "updatedAt": "2026-08-05T08:54:51.229Z", "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 use-after-free in ext4_rename_dir_prepare", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix use-after-free in ext4_rename_dir_prepare\n\nWe got issue as follows:\nEXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue\next4_get_first_dir_block: bh->b_data=0xffff88810bee6000 len=34478\next4_get_first_dir_block: *parent_de=0xffff88810beee6ae bh->b_data=0xffff88810bee6000\next4_rename_dir_prepare: [1] parent_de=0xffff88810beee6ae\n==================================================================\nBUG: KASAN: use-after-free in ext4_rename_dir_prepare+0x152/0x220\nRead of size 4 at addr ffff88810beee6ae by task rep/1895\n\nCPU: 13 PID: 1895 Comm: rep Not tainted 5.10.0+ #241\nCall Trace:\n dump_stack+0xbe/0xf9\n print_address_description.constprop.0+0x1e/0x220\n kasan_report.cold+0x37/0x7f\n ext4_rename_dir_prepare+0x152/0x220\n ext4_rename+0xf44/0x1ad0\n ext4_rename2+0x11c/0x170\n vfs_rename+0xa84/0x1440\n do_renameat2+0x683/0x8f0\n __x64_sys_renameat+0x53/0x60\n do_syscall_64+0x33/0x40\n entry_SYSCALL_64_after_hwframe+0x44/0xa9\nRIP: 0033:0x7f45a6fc41c9\nRSP: 002b:00007ffc5a470218 EFLAGS: 00000246 ORIG_RAX: 0000000000000108\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f45a6fc41c9\nRDX: 0000000000000005 RSI: 0000000020000180 RDI: 0000000000000005\nRBP: 00007ffc5a470240 R08: 00007ffc5a470160 R09: 0000000020000080\nR10: 00000000200001c0 R11: 0000000000000246 R12: 0000000000400bb0\nR13: 00007ffc5a470320 R14: 0000000000000000 R15: 0000000000000000\n\nThe buggy address belongs to the page:\npage:00000000440015ce refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x10beee\nflags: 0x200000000000000()\nraw: 0200000000000000 ffffea00043ff4c8 ffffea0004325608 0000000000000000\nraw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\n ffff88810beee580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n ffff88810beee600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n>ffff88810beee680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n ^\n ffff88810beee700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n ffff88810beee780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n==================================================================\nDisabling lock debugging due to kernel taint\next4_rename_dir_prepare: [2] parent_de->inode=3537895424\next4_rename_dir_prepare: [3] dir=0xffff888124170140\next4_rename_dir_prepare: [4] ino=2\next4_rename_dir_prepare: ent->dir->i_ino=2 parent=-757071872\n\nReason is first directory entry which 'rec_len' is 34478, then will get illegal\nparent entry. Now, we do not check directory entry after read directory block\nin 'ext4_get_first_dir_block'.\nTo solve this issue, check directory entry in 'ext4_get_first_dir_block'.\n\n[ Trigger an ext4_error() instead of just warning if the directory is\n missing a '.' or '..' entry. Also make sure we return an error code\n if the file system is corrupted. -TYT ]", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "32f7f22c0b52e8189fef83986b16dc7abe95f2c4", "status": "affected", "versionType": "git", "lessThan": "1a3a15bf6f9963d755270cbdb282863b84839195" }, { "version": "32f7f22c0b52e8189fef83986b16dc7abe95f2c4", "status": "affected", "versionType": "git", "lessThan": "97f802a652a749422dede32071d29a53cf4bd034" }, { "version": "32f7f22c0b52e8189fef83986b16dc7abe95f2c4", "status": "affected", "versionType": "git", "lessThan": "10801095224de0d0ab06ae60698680c1f883a3ae" }, { "version": "32f7f22c0b52e8189fef83986b16dc7abe95f2c4", "status": "affected", "versionType": "git", "lessThan": "eaecf7ebfd5dd09038a80b14be46b844f54cfc5c" }, { "version": "32f7f22c0b52e8189fef83986b16dc7abe95f2c4", "status": "affected", "versionType": "git", "lessThan": "dd887f83ea54aea5b780a84527e23ab95f777fed" }, { "version": "32f7f22c0b52e8189fef83986b16dc7abe95f2c4", "status": "affected", "versionType": "git", "lessThan": "364380c00912bed9b5d99eb485018360b0ecf64f" }, { "version": "32f7f22c0b52e8189fef83986b16dc7abe95f2c4", "status": "affected", "versionType": "git", "lessThan": "0ff38b99fa075ddd246487a28cb9af049f4ceef1" }, { "version": "32f7f22c0b52e8189fef83986b16dc7abe95f2c4", "status": "affected", "versionType": "git", "lessThan": "4a2bea60cf7ff957b3eda0b17750d483876a02fa" }, { "version": "32f7f22c0b52e8189fef83986b16dc7abe95f2c4", "status": "affected", "versionType": "git", "lessThan": "0be698ecbe4471fcad80e81ec6a05001421041b3" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.8", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.8" }, { "version": "4.9.318", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.9.*" }, { "version": "4.14.283", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.247", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.198", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.121", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.46", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.17.14", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.17.*" }, { "version": "5.18.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.18.*" }, { "version": "5.19", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }