| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix bug in extents parsing when eh_entries == 0 and eh_depth > 0\n\nWhen walking through an inode extents, the ext4_ext_binsearch_idx() function\nassumes that the extent header has been previously validated. However, there\nare no checks that verify that the number of entries (eh->eh_entries) is\nnon-zero when depth is > 0. And this will lead to problems because the\nEXT_FIRST_INDEX() and EXT_LAST_INDEX() will return garbage and result in this:\n\n[ 135.245946] ------------[ cut here ]------------\n[ 135.247579] kernel BUG at fs/ext4/extents.c:2258!\n[ 135.249045] invalid opcode: 0000 [#1] PREEMPT SMP\n[ 135.250320] CPU: 2 PID: 238 Comm: tmp118 Not tainted 5.19.0-rc8+ #4\n[ 135.252067] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b-rebuilt.opensuse.org 04/01/2014\n[ 135.255065] RIP: 0010:ext4_ext_map_blocks+0xc20/0xcb0\n[ 135.256475] Code:\n[ 135.261433] RSP: 0018:ffffc900005939f8 EFLAGS: 00010246\n[ 135.262847] RAX: 0000000000000024 RBX: ffffc90000593b70 RCX: 0000000000000023\n[ 135.264765] RDX: ffff8880038e5f10 RSI: 0000000000000003 RDI: ffff8880046e922c\n[ 135.266670] RBP: ffff8880046e9348 R08: 0000000000000001 R09: ffff888002ca580c\n[ 135.268576] R10: 0000000000002602 R11: 0000000000000000 R12: 0000000000000024\n[ 135.270477] R13: 0000000000000000 R14: 0000000000000024 R15: 0000000000000000\n[ 135.272394] FS: 00007fdabdc56740(0000) GS:ffff88807dd00000(0000) knlGS:0000000000000000\n[ 135.274510] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 135.276075] CR2: 00007ffc26bd4f00 CR3: 0000000006261004 CR4: 0000000000170ea0\n[ 135.277952] Call Trace:\n[ 135.278635] <TASK>\n[ 135.279247] ? preempt_count_add+0x6d/0xa0\n[ 135.280358] ? percpu_counter_add_batch+0x55/0xb0\n[ 135.281612] ? _raw_read_unlock+0x18/0x30\n[ 135.282704] ext4_map_blocks+0x294/0x5a0\n[ 135.283745] ? xa_load+0x6f/0xa0\n[ 135.284562] ext4_mpage_readpages+0x3d6/0x770\n[ 135.285646] read_pages+0x67/0x1d0\n[ 135.286492] ? folio_add_lru+0x51/0x80\n[ 135.287441] page_cache_ra_unbounded+0x124/0x170\n[ 135.288510] filemap_get_pages+0x23d/0x5a0\n[ 135.289457] ? path_openat+0xa72/0xdd0\n[ 135.290332] filemap_read+0xbf/0x300\n[ 135.291158] ? _raw_spin_lock_irqsave+0x17/0x40\n[ 135.292192] new_sync_read+0x103/0x170\n[ 135.293014] vfs_read+0x15d/0x180\n[ 135.293745] ksys_read+0xa1/0xe0\n[ 135.294461] do_syscall_64+0x3c/0x80\n[ 135.295284] entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThis patch simply adds an extra check in __ext4_ext_check(), verifying that\neh_entries is not 0 when eh_depth is > 0." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "fs/ext4/extents.c" |
| ], |
| "versions": [ |
| { |
| "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", |
| "lessThan": "bb7eb3ca4b3b0d2c7872cf1a41c30f5e5bd65df0", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", |
| "lessThan": "958b0ee23f5ac106e7cc11472b71aa2ea9a033bc", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", |
| "lessThan": "be4df018c0be5ebecf1ca510feacc23be415cefc", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", |
| "lessThan": "2f5e9de15e4f55fbf56f22d4a2ce406246cc462d", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", |
| "lessThan": "29a5b8a137ac8eb410cc823653a29ac0e7b7e1b0", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "fs/ext4/extents.c" |
| ], |
| "versions": [ |
| { |
| "version": "5.4.215", |
| "lessThanOrEqual": "5.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.146", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15.71", |
| "lessThanOrEqual": "5.15.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.19.12", |
| "lessThanOrEqual": "5.19.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.0", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "5.4.215" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "5.10.146" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "5.15.71" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "5.19.12" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "6.0" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/bb7eb3ca4b3b0d2c7872cf1a41c30f5e5bd65df0" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/958b0ee23f5ac106e7cc11472b71aa2ea9a033bc" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/be4df018c0be5ebecf1ca510feacc23be415cefc" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/2f5e9de15e4f55fbf56f22d4a2ce406246cc462d" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/29a5b8a137ac8eb410cc823653a29ac0e7b7e1b0" |
| } |
| ], |
| "title": "ext4: fix bug in extents parsing when eh_entries == 0 and eh_depth > 0", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2022-48631", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
