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CVE-2023-53317 (GCVE-0-2023-53317)

Vulnerability from cvelistv5 – Published: 2025-09-16 16:11 – Updated: 2026-05-11 19:42
VLAI
Title
ext4: fix WARNING in mb_find_extent
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: fix WARNING in mb_find_extent Syzbot found the following issue: EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! EXT4-fs (loop0): orphan cleanup on readonly fs ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5067 at fs/ext4/mballoc.c:1869 mb_find_extent+0x8a1/0xe30 Modules linked in: CPU: 1 PID: 5067 Comm: syz-executor307 Not tainted 6.2.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:mb_find_extent+0x8a1/0xe30 fs/ext4/mballoc.c:1869 RSP: 0018:ffffc90003c9e098 EFLAGS: 00010293 RAX: ffffffff82405731 RBX: 0000000000000041 RCX: ffff8880783457c0 RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000000000040 RBP: 0000000000000040 R08: ffffffff82405723 R09: ffffed10053c9402 R10: ffffed10053c9402 R11: 1ffff110053c9401 R12: 0000000000000000 R13: ffffc90003c9e538 R14: dffffc0000000000 R15: ffffc90003c9e2cc FS: 0000555556665300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056312f6796f8 CR3: 0000000022437000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ext4_mb_complex_scan_group+0x353/0x1100 fs/ext4/mballoc.c:2307 ext4_mb_regular_allocator+0x1533/0x3860 fs/ext4/mballoc.c:2735 ext4_mb_new_blocks+0xddf/0x3db0 fs/ext4/mballoc.c:5605 ext4_ext_map_blocks+0x1868/0x6880 fs/ext4/extents.c:4286 ext4_map_blocks+0xa49/0x1cc0 fs/ext4/inode.c:651 ext4_getblk+0x1b9/0x770 fs/ext4/inode.c:864 ext4_bread+0x2a/0x170 fs/ext4/inode.c:920 ext4_quota_write+0x225/0x570 fs/ext4/super.c:7105 write_blk fs/quota/quota_tree.c:64 [inline] get_free_dqblk+0x34a/0x6d0 fs/quota/quota_tree.c:130 do_insert_tree+0x26b/0x1aa0 fs/quota/quota_tree.c:340 do_insert_tree+0x722/0x1aa0 fs/quota/quota_tree.c:375 do_insert_tree+0x722/0x1aa0 fs/quota/quota_tree.c:375 do_insert_tree+0x722/0x1aa0 fs/quota/quota_tree.c:375 dq_insert_tree fs/quota/quota_tree.c:401 [inline] qtree_write_dquot+0x3b6/0x530 fs/quota/quota_tree.c:420 v2_write_dquot+0x11b/0x190 fs/quota/quota_v2.c:358 dquot_acquire+0x348/0x670 fs/quota/dquot.c:444 ext4_acquire_dquot+0x2dc/0x400 fs/ext4/super.c:6740 dqget+0x999/0xdc0 fs/quota/dquot.c:914 __dquot_initialize+0x3d0/0xcf0 fs/quota/dquot.c:1492 ext4_process_orphan+0x57/0x2d0 fs/ext4/orphan.c:329 ext4_orphan_cleanup+0xb60/0x1340 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5516 [inline] ext4_fill_super+0x81cd/0x8700 fs/ext4/super.c:5644 get_tree_bdev+0x400/0x620 fs/super.c:1282 vfs_get_tree+0x88/0x270 fs/super.c:1489 do_new_mount+0x289/0xad0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Add some debug information: mb_find_extent: mb_find_extent block=41, order=0 needed=64 next=0 ex=0/41/1@3735929054 64 64 7 block_bitmap: ff 3f 0c 00 fc 01 00 00 d2 3d 00 00 00 00 00 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff Acctually, blocks per group is 64, but block bitmap indicate at least has 128 blocks. Now, ext4_validate_block_bitmap() didn't check invalid block's bitmap if set. To resolve above issue, add check like fsck "Padding at end of block bitmap is not set".
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:26 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: abcb2947c91130426539f209f7a473a67a1f6663 , < 775b00ba23f6f916fe2ac60c5ff7fd0fe4f28d0d (git)
Affected: abcb2947c91130426539f209f7a473a67a1f6663 , < 1b90fbc7590124c57a2e590de7fd07eba26606f1 (git)
Affected: abcb2947c91130426539f209f7a473a67a1f6663 , < 5d356d902e9d5b1aaaaf2326d365340fa8a90c1b (git)
Affected: abcb2947c91130426539f209f7a473a67a1f6663 , < d55e76e11592a1d18a179c7fd34ca1b52632beb3 (git)
Affected: abcb2947c91130426539f209f7a473a67a1f6663 , < dba62fa84a8eac44a53a2862de8a40e5bdfa0ae3 (git)
Affected: abcb2947c91130426539f209f7a473a67a1f6663 , < e4d503c956a744cb59e509ca5f134cfad423c7a3 (git)
Affected: abcb2947c91130426539f209f7a473a67a1f6663 , < dd45e536f47a82e0a405f9a4b6c7ceb367171ee9 (git)
Affected: abcb2947c91130426539f209f7a473a67a1f6663 , < fa08a7b61dff8a4df11ff1e84abfc214b487caf7 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.25
Unaffected: 0 , < 2.6.25 (semver)
Unaffected: 4.19.283 , ≤ 4.19.* (semver)
Unaffected: 5.4.243 , ≤ 5.4.* (semver)
Unaffected: 5.10.180 , ≤ 5.10.* (semver)
Unaffected: 5.15.112 , ≤ 5.15.* (semver)
Unaffected: 6.1.29 , ≤ 6.1.* (semver)
Unaffected: 6.2.16 , ≤ 6.2.* (semver)
Unaffected: 6.3.3 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix WARNING in mb_find_extent\n\nSyzbot found the following issue:\n\nEXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\nEXT4-fs (loop0): orphan cleanup on readonly fs\n------------[ cut here ]------------\nWARNING: CPU: 1 PID: 5067 at fs/ext4/mballoc.c:1869 mb_find_extent+0x8a1/0xe30\nModules linked in:\nCPU: 1 PID: 5067 Comm: syz-executor307 Not tainted 6.2.0-rc1-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\nRIP: 0010:mb_find_extent+0x8a1/0xe30 fs/ext4/mballoc.c:1869\nRSP: 0018:ffffc90003c9e098 EFLAGS: 00010293\nRAX: ffffffff82405731 RBX: 0000000000000041 RCX: ffff8880783457c0\nRDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000000000040\nRBP: 0000000000000040 R08: ffffffff82405723 R09: ffffed10053c9402\nR10: ffffed10053c9402 R11: 1ffff110053c9401 R12: 0000000000000000\nR13: ffffc90003c9e538 R14: dffffc0000000000 R15: ffffc90003c9e2cc\nFS:  0000555556665300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000056312f6796f8 CR3: 0000000022437000 CR4: 00000000003506e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n ext4_mb_complex_scan_group+0x353/0x1100 fs/ext4/mballoc.c:2307\n ext4_mb_regular_allocator+0x1533/0x3860 fs/ext4/mballoc.c:2735\n ext4_mb_new_blocks+0xddf/0x3db0 fs/ext4/mballoc.c:5605\n ext4_ext_map_blocks+0x1868/0x6880 fs/ext4/extents.c:4286\n ext4_map_blocks+0xa49/0x1cc0 fs/ext4/inode.c:651\n ext4_getblk+0x1b9/0x770 fs/ext4/inode.c:864\n ext4_bread+0x2a/0x170 fs/ext4/inode.c:920\n ext4_quota_write+0x225/0x570 fs/ext4/super.c:7105\n write_blk fs/quota/quota_tree.c:64 [inline]\n get_free_dqblk+0x34a/0x6d0 fs/quota/quota_tree.c:130\n do_insert_tree+0x26b/0x1aa0 fs/quota/quota_tree.c:340\n do_insert_tree+0x722/0x1aa0 fs/quota/quota_tree.c:375\n do_insert_tree+0x722/0x1aa0 fs/quota/quota_tree.c:375\n do_insert_tree+0x722/0x1aa0 fs/quota/quota_tree.c:375\n dq_insert_tree fs/quota/quota_tree.c:401 [inline]\n qtree_write_dquot+0x3b6/0x530 fs/quota/quota_tree.c:420\n v2_write_dquot+0x11b/0x190 fs/quota/quota_v2.c:358\n dquot_acquire+0x348/0x670 fs/quota/dquot.c:444\n ext4_acquire_dquot+0x2dc/0x400 fs/ext4/super.c:6740\n dqget+0x999/0xdc0 fs/quota/dquot.c:914\n __dquot_initialize+0x3d0/0xcf0 fs/quota/dquot.c:1492\n ext4_process_orphan+0x57/0x2d0 fs/ext4/orphan.c:329\n ext4_orphan_cleanup+0xb60/0x1340 fs/ext4/orphan.c:474\n __ext4_fill_super fs/ext4/super.c:5516 [inline]\n ext4_fill_super+0x81cd/0x8700 fs/ext4/super.c:5644\n get_tree_bdev+0x400/0x620 fs/super.c:1282\n vfs_get_tree+0x88/0x270 fs/super.c:1489\n do_new_mount+0x289/0xad0 fs/namespace.c:3145\n do_mount fs/namespace.c:3488 [inline]\n __do_sys_mount fs/namespace.c:3697 [inline]\n __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nAdd some debug information:\nmb_find_extent: mb_find_extent block=41, order=0 needed=64 next=0 ex=0/41/1@3735929054 64 64 7\nblock_bitmap: ff 3f 0c 00 fc 01 00 00 d2 3d 00 00 00 00 00 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n\nAcctually, blocks per group is 64, but block bitmap indicate at least has\n128 blocks. Now, ext4_validate_block_bitmap() didn\u0027t check invalid block\u0027s\nbitmap if set.\nTo resolve above issue, add check like fsck \"Padding at end of block bitmap is\nnot set\"."
        }
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          "url": "https://git.kernel.org/stable/c/775b00ba23f6f916fe2ac60c5ff7fd0fe4f28d0d"
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          "url": "https://git.kernel.org/stable/c/1b90fbc7590124c57a2e590de7fd07eba26606f1"
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        },
        {
          "url": "https://git.kernel.org/stable/c/fa08a7b61dff8a4df11ff1e84abfc214b487caf7"
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      "title": "ext4: fix WARNING in mb_find_extent",
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      "percentile": "0.05093"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53317\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-16T17:15:37.713\",\"lastModified\":\"2026-06-17T06:44:52.243\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\next4: fix WARNING in mb_find_extent\\n\\nSyzbot found the following issue:\\n\\nEXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\\nEXT4-fs (loop0): orphan cleanup on readonly fs\\n------------[ cut here ]------------\\nWARNING: CPU: 1 PID: 5067 at fs/ext4/mballoc.c:1869 mb_find_extent+0x8a1/0xe30\\nModules linked in:\\nCPU: 1 PID: 5067 Comm: syz-executor307 Not tainted 6.2.0-rc1-syzkaller #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\\nRIP: 0010:mb_find_extent+0x8a1/0xe30 fs/ext4/mballoc.c:1869\\nRSP: 0018:ffffc90003c9e098 EFLAGS: 00010293\\nRAX: ffffffff82405731 RBX: 0000000000000041 RCX: ffff8880783457c0\\nRDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000000000040\\nRBP: 0000000000000040 R08: ffffffff82405723 R09: ffffed10053c9402\\nR10: ffffed10053c9402 R11: 1ffff110053c9401 R12: 0000000000000000\\nR13: ffffc90003c9e538 R14: dffffc0000000000 R15: ffffc90003c9e2cc\\nFS:  0000555556665300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 000056312f6796f8 CR3: 0000000022437000 CR4: 00000000003506e0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nCall Trace:\\n \u003cTASK\u003e\\n ext4_mb_complex_scan_group+0x353/0x1100 fs/ext4/mballoc.c:2307\\n ext4_mb_regular_allocator+0x1533/0x3860 fs/ext4/mballoc.c:2735\\n ext4_mb_new_blocks+0xddf/0x3db0 fs/ext4/mballoc.c:5605\\n ext4_ext_map_blocks+0x1868/0x6880 fs/ext4/extents.c:4286\\n ext4_map_blocks+0xa49/0x1cc0 fs/ext4/inode.c:651\\n ext4_getblk+0x1b9/0x770 fs/ext4/inode.c:864\\n ext4_bread+0x2a/0x170 fs/ext4/inode.c:920\\n ext4_quota_write+0x225/0x570 fs/ext4/super.c:7105\\n write_blk fs/quota/quota_tree.c:64 [inline]\\n get_free_dqblk+0x34a/0x6d0 fs/quota/quota_tree.c:130\\n do_insert_tree+0x26b/0x1aa0 fs/quota/quota_tree.c:340\\n do_insert_tree+0x722/0x1aa0 fs/quota/quota_tree.c:375\\n do_insert_tree+0x722/0x1aa0 fs/quota/quota_tree.c:375\\n do_insert_tree+0x722/0x1aa0 fs/quota/quota_tree.c:375\\n dq_insert_tree fs/quota/quota_tree.c:401 [inline]\\n qtree_write_dquot+0x3b6/0x530 fs/quota/quota_tree.c:420\\n v2_write_dquot+0x11b/0x190 fs/quota/quota_v2.c:358\\n dquot_acquire+0x348/0x670 fs/quota/dquot.c:444\\n ext4_acquire_dquot+0x2dc/0x400 fs/ext4/super.c:6740\\n dqget+0x999/0xdc0 fs/quota/dquot.c:914\\n __dquot_initialize+0x3d0/0xcf0 fs/quota/dquot.c:1492\\n ext4_process_orphan+0x57/0x2d0 fs/ext4/orphan.c:329\\n ext4_orphan_cleanup+0xb60/0x1340 fs/ext4/orphan.c:474\\n __ext4_fill_super fs/ext4/super.c:5516 [inline]\\n ext4_fill_super+0x81cd/0x8700 fs/ext4/super.c:5644\\n get_tree_bdev+0x400/0x620 fs/super.c:1282\\n vfs_get_tree+0x88/0x270 fs/super.c:1489\\n do_new_mount+0x289/0xad0 fs/namespace.c:3145\\n do_mount fs/namespace.c:3488 [inline]\\n __do_sys_mount fs/namespace.c:3697 [inline]\\n __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674\\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nAdd some debug information:\\nmb_find_extent: mb_find_extent block=41, order=0 needed=64 next=0 ex=0/41/1@3735929054 64 64 7\\nblock_bitmap: ff 3f 0c 00 fc 01 00 00 d2 3d 00 00 00 00 00 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\\n\\nAcctually, blocks per group is 64, but block bitmap indicate at least has\\n128 blocks. Now, ext4_validate_block_bitmap() didn\u0027t check invalid block\u0027s\\nbitmap if set.\\nTo resolve above issue, add check like fsck \\\"Padding at end of block bitmap is\\nnot set\\\".\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/ext4/balloc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"abcb2947c91130426539f209f7a473a67a1f6663\",\"lessThan\":\"775b00ba23f6f916fe2ac60c5ff7fd0fe4f28d0d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"abcb2947c91130426539f209f7a473a67a1f6663\",\"lessThan\":\"1b90fbc7590124c57a2e590de7fd07eba26606f1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"abcb2947c91130426539f209f7a473a67a1f6663\",\"lessThan\":\"5d356d902e9d5b1aaaaf2326d365340fa8a90c1b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"abcb2947c91130426539f209f7a473a67a1f6663\",\"lessThan\":\"d55e76e11592a1d18a179c7fd34ca1b52632beb3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"abcb2947c91130426539f209f7a473a67a1f6663\",\"lessThan\":\"dba62fa84a8eac44a53a2862de8a40e5bdfa0ae3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"abcb2947c91130426539f209f7a473a67a1f6663\",\"lessThan\":\"e4d503c956a744cb59e509ca5f134cfad423c7a3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"abcb2947c91130426539f209f7a473a67a1f6663\",\"lessThan\":\"dd45e536f47a82e0a405f9a4b6c7ceb367171ee9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"abcb2947c91130426539f209f7a473a67a1f6663\",\"lessThan\":\"fa08a7b61dff8a4df11ff1e84abfc214b487caf7\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/ext4/balloc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.25\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.25\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.283\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.243\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.180\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.112\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.29\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2.16\",\"lessThanOrEqual\":\"6.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.3.3\",\"lessThanOrEqual\":\"6.3.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.4\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-01-14T18:26:23.171880Z\",\"id\":\"CVE-2023-53317\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"4.19.283\",\"matchCriteriaId\":\"4CD72EDE-728E-485C-B222-F269B229C33E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.243\",\"matchCriteriaId\":\"E54ACEF5-C8C1-4266-85FC-7D513FFD1DEC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.180\",\"matchCriteriaId\":\"78422AC3-CC89-479E-B4BC-62381D8F3564\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.112\",\"matchCriteriaId\":\"8612AB29-948C-4D53-84D9-6CA2E4A8B015\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.29\",\"matchCriteriaId\":\"D48F00B5-5471-4D1B-BE47-1DAB8122F35A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.2.16\",\"matchCriteriaId\":\"F92F7C8E-A977-4255-B1B6-D1908D8B408F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.3\",\"versionEndExcluding\":\"6.3.3\",\"matchCriteriaId\":\"6D96A7FC-D812-4458-AEA8-3FF4023E6B75\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"38BC6744-7D25-4C02-9966-B224CD071D30\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1b90fbc7590124c57a2e590de7fd07eba26606f1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5d356d902e9d5b1aaaaf2326d365340fa8a90c1b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/775b00ba23f6f916fe2ac60c5ff7fd0fe4f28d0d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d55e76e11592a1d18a179c7fd34ca1b52632beb3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/dba62fa84a8eac44a53a2862de8a40e5bdfa0ae3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/dd45e536f47a82e0a405f9a4b6c7ceb367171ee9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e4d503c956a744cb59e509ca5f134cfad423c7a3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fa08a7b61dff8a4df11ff1e84abfc214b487caf7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T22:17:32+00:00",
      "cve": "CVE-2023-53317",
      "id": "CVE-2023-53317",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "279",
      "product_status:known_affected": "188",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ext4: fix WARNING in mb_find_extent",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53317.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T00:59:44Z",
      "cve": "CVE-2023-53317",
      "id": "CVE-2023-53317",
      "initial_release_date": "2025-09-16T23:29:34Z",
      "product_status:known_affected": "540",
      "product_status:known_not_affected": "176",
      "product_status:recommended": "272",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53317",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53317.json",
      "version": "34"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-53317\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T18:26:23.171880Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"CWE-noinfo Not enough information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T18:26:19.152Z\"}}], \"cna\": {\"title\": \"ext4: fix WARNING in mb_find_extent\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"abcb2947c91130426539f209f7a473a67a1f6663\", \"lessThan\": \"775b00ba23f6f916fe2ac60c5ff7fd0fe4f28d0d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"abcb2947c91130426539f209f7a473a67a1f6663\", \"lessThan\": \"1b90fbc7590124c57a2e590de7fd07eba26606f1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"abcb2947c91130426539f209f7a473a67a1f6663\", \"lessThan\": \"5d356d902e9d5b1aaaaf2326d365340fa8a90c1b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"abcb2947c91130426539f209f7a473a67a1f6663\", \"lessThan\": \"d55e76e11592a1d18a179c7fd34ca1b52632beb3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"abcb2947c91130426539f209f7a473a67a1f6663\", \"lessThan\": \"dba62fa84a8eac44a53a2862de8a40e5bdfa0ae3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"abcb2947c91130426539f209f7a473a67a1f6663\", \"lessThan\": \"e4d503c956a744cb59e509ca5f134cfad423c7a3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"abcb2947c91130426539f209f7a473a67a1f6663\", \"lessThan\": \"dd45e536f47a82e0a405f9a4b6c7ceb367171ee9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"abcb2947c91130426539f209f7a473a67a1f6663\", \"lessThan\": \"fa08a7b61dff8a4df11ff1e84abfc214b487caf7\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/ext4/balloc.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.25\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.25\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.283\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.243\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.180\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.112\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.29\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.2.16\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.2.*\"}, {\"status\": \"unaffected\", \"version\": \"6.3.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.3.*\"}, {\"status\": \"unaffected\", \"version\": \"6.4\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/ext4/balloc.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/775b00ba23f6f916fe2ac60c5ff7fd0fe4f28d0d\"}, {\"url\": \"https://git.kernel.org/stable/c/1b90fbc7590124c57a2e590de7fd07eba26606f1\"}, {\"url\": \"https://git.kernel.org/stable/c/5d356d902e9d5b1aaaaf2326d365340fa8a90c1b\"}, {\"url\": \"https://git.kernel.org/stable/c/d55e76e11592a1d18a179c7fd34ca1b52632beb3\"}, {\"url\": \"https://git.kernel.org/stable/c/dba62fa84a8eac44a53a2862de8a40e5bdfa0ae3\"}, {\"url\": \"https://git.kernel.org/stable/c/e4d503c956a744cb59e509ca5f134cfad423c7a3\"}, {\"url\": \"https://git.kernel.org/stable/c/dd45e536f47a82e0a405f9a4b6c7ceb367171ee9\"}, {\"url\": \"https://git.kernel.org/stable/c/fa08a7b61dff8a4df11ff1e84abfc214b487caf7\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\next4: fix WARNING in mb_find_extent\\n\\nSyzbot found the following issue:\\n\\nEXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\\nEXT4-fs (loop0): orphan cleanup on readonly fs\\n------------[ cut here ]------------\\nWARNING: CPU: 1 PID: 5067 at fs/ext4/mballoc.c:1869 mb_find_extent+0x8a1/0xe30\\nModules linked in:\\nCPU: 1 PID: 5067 Comm: syz-executor307 Not tainted 6.2.0-rc1-syzkaller #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\\nRIP: 0010:mb_find_extent+0x8a1/0xe30 fs/ext4/mballoc.c:1869\\nRSP: 0018:ffffc90003c9e098 EFLAGS: 00010293\\nRAX: ffffffff82405731 RBX: 0000000000000041 RCX: ffff8880783457c0\\nRDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000000000040\\nRBP: 0000000000000040 R08: ffffffff82405723 R09: ffffed10053c9402\\nR10: ffffed10053c9402 R11: 1ffff110053c9401 R12: 0000000000000000\\nR13: ffffc90003c9e538 R14: dffffc0000000000 R15: ffffc90003c9e2cc\\nFS:  0000555556665300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 000056312f6796f8 CR3: 0000000022437000 CR4: 00000000003506e0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nCall Trace:\\n \u003cTASK\u003e\\n ext4_mb_complex_scan_group+0x353/0x1100 fs/ext4/mballoc.c:2307\\n ext4_mb_regular_allocator+0x1533/0x3860 fs/ext4/mballoc.c:2735\\n ext4_mb_new_blocks+0xddf/0x3db0 fs/ext4/mballoc.c:5605\\n ext4_ext_map_blocks+0x1868/0x6880 fs/ext4/extents.c:4286\\n ext4_map_blocks+0xa49/0x1cc0 fs/ext4/inode.c:651\\n ext4_getblk+0x1b9/0x770 fs/ext4/inode.c:864\\n ext4_bread+0x2a/0x170 fs/ext4/inode.c:920\\n ext4_quota_write+0x225/0x570 fs/ext4/super.c:7105\\n write_blk fs/quota/quota_tree.c:64 [inline]\\n get_free_dqblk+0x34a/0x6d0 fs/quota/quota_tree.c:130\\n do_insert_tree+0x26b/0x1aa0 fs/quota/quota_tree.c:340\\n do_insert_tree+0x722/0x1aa0 fs/quota/quota_tree.c:375\\n do_insert_tree+0x722/0x1aa0 fs/quota/quota_tree.c:375\\n do_insert_tree+0x722/0x1aa0 fs/quota/quota_tree.c:375\\n dq_insert_tree fs/quota/quota_tree.c:401 [inline]\\n qtree_write_dquot+0x3b6/0x530 fs/quota/quota_tree.c:420\\n v2_write_dquot+0x11b/0x190 fs/quota/quota_v2.c:358\\n dquot_acquire+0x348/0x670 fs/quota/dquot.c:444\\n ext4_acquire_dquot+0x2dc/0x400 fs/ext4/super.c:6740\\n dqget+0x999/0xdc0 fs/quota/dquot.c:914\\n __dquot_initialize+0x3d0/0xcf0 fs/quota/dquot.c:1492\\n ext4_process_orphan+0x57/0x2d0 fs/ext4/orphan.c:329\\n ext4_orphan_cleanup+0xb60/0x1340 fs/ext4/orphan.c:474\\n __ext4_fill_super fs/ext4/super.c:5516 [inline]\\n ext4_fill_super+0x81cd/0x8700 fs/ext4/super.c:5644\\n get_tree_bdev+0x400/0x620 fs/super.c:1282\\n vfs_get_tree+0x88/0x270 fs/super.c:1489\\n do_new_mount+0x289/0xad0 fs/namespace.c:3145\\n do_mount fs/namespace.c:3488 [inline]\\n __do_sys_mount fs/namespace.c:3697 [inline]\\n __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674\\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nAdd some debug information:\\nmb_find_extent: mb_find_extent block=41, order=0 needed=64 next=0 ex=0/41/1@3735929054 64 64 7\\nblock_bitmap: ff 3f 0c 00 fc 01 00 00 d2 3d 00 00 00 00 00 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\\n\\nAcctually, blocks per group is 64, but block bitmap indicate at least has\\n128 blocks. Now, ext4_validate_block_bitmap() didn\u0027t check invalid block\u0027s\\nbitmap if set.\\nTo resolve above issue, add check like fsck \\\"Padding at end of block bitmap is\\nnot set\\\".\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.283\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.243\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.180\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.112\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.29\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.2.16\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.3.3\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4\", \"versionStartIncluding\": \"2.6.25\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:19:22.898Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-53317\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-14T18:32:57.980Z\", \"dateReserved\": \"2025-09-16T16:08:59.563Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-16T16:11:53.877Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.