{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "cveId": "CVE-2022-48631", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-25T13:44:28.315Z", "datePublished": "2024-04-28T12:59:06.569Z", "dateUpdated": "2024-08-03T15:17:55.530Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:10:30.805Z" }, "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] \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": "1da177e4c3f4", "lessThan": "bb7eb3ca4b3b", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "958b0ee23f5a", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "be4df018c0be", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "2f5e9de15e4f", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "29a5b8a137ac", "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": "custom" }, { "version": "5.10.146", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.71", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.19.12", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "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-a5840b7849dd" } }, "adp": [ { "title": "CISA ADP Vulnrichment", "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2022-48631", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-05-28T18:41:13.268987Z" } } } ], "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:16:47.424Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:17:55.530Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/bb7eb3ca4b3b0d2c7872cf1a41c30f5e5bd65df0", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/958b0ee23f5ac106e7cc11472b71aa2ea9a033bc", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/be4df018c0be5ebecf1ca510feacc23be415cefc", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/2f5e9de15e4f55fbf56f22d4a2ce406246cc462d", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/29a5b8a137ac8eb410cc823653a29ac0e7b7e1b0", "tags": [ "x_transferred" ] } ] } ] } }