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CVE-2022-49347 (GCVE-0-2022-49347)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:11 – Updated: 2026-05-11 18:57
VLAI
Title
ext4: fix bug_on in ext4_writepages
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: fix bug_on in ext4_writepages we got issue as follows: EXT4-fs error (device loop0): ext4_mb_generate_buddy:1141: group 0, block bitmap and bg descriptor inconsistent: 25 vs 31513 free cls ------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2708! invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 2 PID: 2147 Comm: rep Not tainted 5.18.0-rc2-next-20220413+ #155 RIP: 0010:ext4_writepages+0x1977/0x1c10 RSP: 0018:ffff88811d3e7880 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88811c098000 RDX: 0000000000000000 RSI: ffff88811c098000 RDI: 0000000000000002 RBP: ffff888128140f50 R08: ffffffffb1ff6387 R09: 0000000000000000 R10: 0000000000000007 R11: ffffed10250281ea R12: 0000000000000001 R13: 00000000000000a4 R14: ffff88811d3e7bb8 R15: ffff888128141028 FS: 00007f443aed9740(0000) GS:ffff8883aef00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020007200 CR3: 000000011c2a4000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> do_writepages+0x130/0x3a0 filemap_fdatawrite_wbc+0x83/0xa0 filemap_flush+0xab/0xe0 ext4_alloc_da_blocks+0x51/0x120 __ext4_ioctl+0x1534/0x3210 __x64_sys_ioctl+0x12c/0x170 do_syscall_64+0x3b/0x90 It may happen as follows: 1. write inline_data inode vfs_write new_sync_write ext4_file_write_iter ext4_buffered_write_iter generic_perform_write ext4_da_write_begin ext4_da_write_inline_data_begin -> If inline data size too small will allocate block to write, then mapping will has dirty page ext4_da_convert_inline_data_to_extent ->clear EXT4_STATE_MAY_INLINE_DATA 2. fallocate do_vfs_ioctl ioctl_preallocate vfs_fallocate ext4_fallocate ext4_convert_inline_data ext4_convert_inline_data_nolock ext4_map_blocks -> fail will goto restore data ext4_restore_inline_data ext4_create_inline_data ext4_write_inline_data ext4_set_inode_state -> set inode EXT4_STATE_MAY_INLINE_DATA 3. writepages __ext4_ioctl ext4_alloc_da_blocks filemap_flush filemap_fdatawrite_wbc do_writepages ext4_writepages if (ext4_has_inline_data(inode)) BUG_ON(ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) The root cause of this issue is we destory inline data until call ext4_writepages under delay allocation mode. But there maybe already convert from inline to extent. To solve this issue, we call filemap_flush first..
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3c47d54170b6a678875566b1b8d6dcf57904e49b , < 19918ec7717d87d5ab825884a46b26b21375d7ce (git)
Affected: 3c47d54170b6a678875566b1b8d6dcf57904e49b , < b2b78f5bf2d453dda3903955efee059260787a42 (git)
Affected: 3c47d54170b6a678875566b1b8d6dcf57904e49b , < de1732b5c1693ad489c5d254f124f67cb775f37d (git)
Affected: 3c47d54170b6a678875566b1b8d6dcf57904e49b , < 73fd5b19285197078ee8a2e651d75d5b094a4de9 (git)
Affected: 3c47d54170b6a678875566b1b8d6dcf57904e49b , < 1b061af037646c9cdb0afd8a8d2f1e1c06285866 (git)
Affected: 3c47d54170b6a678875566b1b8d6dcf57904e49b , < 18a759f7f99f0b65a08ff5b7e745fc405a42bde4 (git)
Affected: 3c47d54170b6a678875566b1b8d6dcf57904e49b , < 1cde35417edc0370fb0179a4e38b78a15350a8d0 (git)
Affected: 3c47d54170b6a678875566b1b8d6dcf57904e49b , < 013f12bdedb96816aaa27ee04349f4433d361f52 (git)
Affected: 3c47d54170b6a678875566b1b8d6dcf57904e49b , < ef09ed5d37b84d18562b30cf7253e57062d0db05 (git)
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Linux Linux Affected: 3.8
Unaffected: 0 , < 3.8 (semver)
Unaffected: 4.9.318 , ≤ 4.9.* (semver)
Unaffected: 4.14.283 , ≤ 4.14.* (semver)
Unaffected: 4.19.247 , ≤ 4.19.* (semver)
Unaffected: 5.4.198 , ≤ 5.4.* (semver)
Unaffected: 5.10.121 , ≤ 5.10.* (semver)
Unaffected: 5.15.46 , ≤ 5.15.* (semver)
Unaffected: 5.17.14 , ≤ 5.17.* (semver)
Unaffected: 5.18.3 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix bug_on in ext4_writepages\n\nwe got issue as follows:\nEXT4-fs error (device loop0): ext4_mb_generate_buddy:1141: group 0, block bitmap and bg descriptor inconsistent: 25 vs 31513 free cls\n------------[ cut here ]------------\nkernel BUG at fs/ext4/inode.c:2708!\ninvalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\nCPU: 2 PID: 2147 Comm: rep Not tainted 5.18.0-rc2-next-20220413+ #155\nRIP: 0010:ext4_writepages+0x1977/0x1c10\nRSP: 0018:ffff88811d3e7880 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88811c098000\nRDX: 0000000000000000 RSI: ffff88811c098000 RDI: 0000000000000002\nRBP: ffff888128140f50 R08: ffffffffb1ff6387 R09: 0000000000000000\nR10: 0000000000000007 R11: ffffed10250281ea R12: 0000000000000001\nR13: 00000000000000a4 R14: ffff88811d3e7bb8 R15: ffff888128141028\nFS:  00007f443aed9740(0000) GS:ffff8883aef00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000020007200 CR3: 000000011c2a4000 CR4: 00000000000006e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n do_writepages+0x130/0x3a0\n filemap_fdatawrite_wbc+0x83/0xa0\n filemap_flush+0xab/0xe0\n ext4_alloc_da_blocks+0x51/0x120\n __ext4_ioctl+0x1534/0x3210\n __x64_sys_ioctl+0x12c/0x170\n do_syscall_64+0x3b/0x90\n\nIt may happen as follows:\n1. write inline_data inode\nvfs_write\n  new_sync_write\n    ext4_file_write_iter\n      ext4_buffered_write_iter\n        generic_perform_write\n          ext4_da_write_begin\n            ext4_da_write_inline_data_begin -\u003e If inline data size too\n            small will allocate block to write, then mapping will has\n            dirty page\n                ext4_da_convert_inline_data_to_extent -\u003eclear EXT4_STATE_MAY_INLINE_DATA\n2. fallocate\ndo_vfs_ioctl\n  ioctl_preallocate\n    vfs_fallocate\n      ext4_fallocate\n        ext4_convert_inline_data\n          ext4_convert_inline_data_nolock\n            ext4_map_blocks -\u003e fail will goto restore data\n            ext4_restore_inline_data\n              ext4_create_inline_data\n              ext4_write_inline_data\n              ext4_set_inode_state -\u003e set inode EXT4_STATE_MAY_INLINE_DATA\n3. writepages\n__ext4_ioctl\n  ext4_alloc_da_blocks\n    filemap_flush\n      filemap_fdatawrite_wbc\n        do_writepages\n          ext4_writepages\n            if (ext4_has_inline_data(inode))\n              BUG_ON(ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA))\n\nThe root cause of this issue is we destory inline data until call\next4_writepages under delay allocation mode.  But there maybe already\nconvert from inline to extent.  To solve this issue, we call\nfilemap_flush first.."
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        "dateUpdated": "2026-05-11T18:57:56.471Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/1b061af037646c9cdb0afd8a8d2f1e1c06285866"
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          "url": "https://git.kernel.org/stable/c/18a759f7f99f0b65a08ff5b7e745fc405a42bde4"
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        {
          "url": "https://git.kernel.org/stable/c/ef09ed5d37b84d18562b30cf7253e57062d0db05"
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      "title": "ext4: fix bug_on in ext4_writepages",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49347",
    "datePublished": "2025-02-26T02:11:01.983Z",
    "dateReserved": "2025-02-26T02:08:31.543Z",
    "dateUpdated": "2026-05-11T18:57:56.471Z",
    "state": "PUBLISHED"
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      "date": "2026-09-16",
      "epss": "0.00291",
      "percentile": "0.21696"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49347\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:11.433\",\"lastModified\":\"2026-06-17T05:17:47.110\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\next4: fix bug_on in ext4_writepages\\n\\nwe got issue as follows:\\nEXT4-fs error (device loop0): ext4_mb_generate_buddy:1141: group 0, block bitmap and bg descriptor inconsistent: 25 vs 31513 free cls\\n------------[ cut here ]------------\\nkernel BUG at fs/ext4/inode.c:2708!\\ninvalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\\nCPU: 2 PID: 2147 Comm: rep Not tainted 5.18.0-rc2-next-20220413+ #155\\nRIP: 0010:ext4_writepages+0x1977/0x1c10\\nRSP: 0018:ffff88811d3e7880 EFLAGS: 00010246\\nRAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88811c098000\\nRDX: 0000000000000000 RSI: ffff88811c098000 RDI: 0000000000000002\\nRBP: ffff888128140f50 R08: ffffffffb1ff6387 R09: 0000000000000000\\nR10: 0000000000000007 R11: ffffed10250281ea R12: 0000000000000001\\nR13: 00000000000000a4 R14: ffff88811d3e7bb8 R15: ffff888128141028\\nFS:  00007f443aed9740(0000) GS:ffff8883aef00000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 0000000020007200 CR3: 000000011c2a4000 CR4: 00000000000006e0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nCall Trace:\\n \u003cTASK\u003e\\n do_writepages+0x130/0x3a0\\n filemap_fdatawrite_wbc+0x83/0xa0\\n filemap_flush+0xab/0xe0\\n ext4_alloc_da_blocks+0x51/0x120\\n __ext4_ioctl+0x1534/0x3210\\n __x64_sys_ioctl+0x12c/0x170\\n do_syscall_64+0x3b/0x90\\n\\nIt may happen as follows:\\n1. write inline_data inode\\nvfs_write\\n  new_sync_write\\n    ext4_file_write_iter\\n      ext4_buffered_write_iter\\n        generic_perform_write\\n          ext4_da_write_begin\\n            ext4_da_write_inline_data_begin -\u003e If inline data size too\\n            small will allocate block to write, then mapping will has\\n            dirty page\\n                ext4_da_convert_inline_data_to_extent -\u003eclear EXT4_STATE_MAY_INLINE_DATA\\n2. fallocate\\ndo_vfs_ioctl\\n  ioctl_preallocate\\n    vfs_fallocate\\n      ext4_fallocate\\n        ext4_convert_inline_data\\n          ext4_convert_inline_data_nolock\\n            ext4_map_blocks -\u003e fail will goto restore data\\n            ext4_restore_inline_data\\n              ext4_create_inline_data\\n              ext4_write_inline_data\\n              ext4_set_inode_state -\u003e set inode EXT4_STATE_MAY_INLINE_DATA\\n3. writepages\\n__ext4_ioctl\\n  ext4_alloc_da_blocks\\n    filemap_flush\\n      filemap_fdatawrite_wbc\\n        do_writepages\\n          ext4_writepages\\n            if (ext4_has_inline_data(inode))\\n              BUG_ON(ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA))\\n\\nThe root cause of this issue is we destory inline data until call\\next4_writepages under delay allocation mode.  But there maybe already\\nconvert from inline to extent.  To solve this issue, we call\\nfilemap_flush first..\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: correcci\u00f3n de bug_on en ext4_writepages. Tenemos el siguiente problema: Error EXT4-fs (dispositivo loop0): ext4_mb_generate_buddy:1141: grupo 0, mapa de bits de bloque y descriptor de fondo inconsistentes: 25 frente a 31513 cls libres ------------[ corte aqu\u00ed ]------------ \u00a1ERROR del kernel en fs/ext4/inode.c:2708! c\u00f3digo de operaci\u00f3n no v\u00e1lido: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 2 PID: 2147 Comm: rep No contaminado 5.18.0-rc2-next-20220413+ #155 RIP: 0010:ext4_writepages+0x1977/0x1c10 RSP: 0018:ffff88811d3e7880 EFLAGS: 00010246 RAX: 000000000000000 RBX: 0000000000000001 RCX: ffff88811c098000 RDX: 0000000000000000 RSI: ffff88811c098000 RDI: 00000000000000002 RBP: ffff888128140f50 R08: ffffffffb1ff6387 R09: 0000000000000000 R10: 0000000000000007 R11: ffffed10250281ea R12: 000000000000001 R13: 00000000000000a4 R14: ffff88811d3e7bb8 R15: ffff888128141028 FS: 00007f443aed9740(0000) GS:ffff8883aef00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020007200 CR3: 000000011c2a4000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Seguimiento de llamadas:  do_writepages+0x130/0x3a0 filemap_fdatawrite_wbc+0x83/0xa0 filemap_flush+0xab/0xe0 ext4_alloc_da_blocks+0x51/0x120 __ext4_ioctl+0x1534/0x3210 __x64_sys_ioctl+0x12c/0x170 do_syscall_64+0x3b/0x90 Puede suceder de la siguiente manera: 1. escribir inline_data inodo vfs_write new_sync_write ext4_file_write_iter ext4_buffered_write_iter generic_perform_write ext4_da_write_begin ext4_da_write_inline_data_begin -\u0026gt; Si el tama\u00f1o de los datos en l\u00ednea es demasiado peque\u00f1o, se asignar\u00e1 un bloque para escribir, luego la asignaci\u00f3n tendr\u00e1 una p\u00e1gina sucia ext4_da_convert_inline_data_to_extent -\u0026gt; borrar EXT4_STATE_MAY_INLINE_DATA 2. fallocate do_vfs_ioctl ioctl_preallocate vfs_fallocate ext4_fallocate ext4_convert_inline_data ext4_convert_inline_data_nolock ext4_map_blocks -\u0026gt; falla ir\u00e1 a restaurar datos ext4_restore_inline_data ext4_crear_inline_data ext4_write_inline_data ext4_set_inode_state -\u0026gt; establecer inodo EXT4_STATE_MAY_INLINE_DATA 3. writepages __ext4_ioctl ext4_alloc_da_blocks filemap_flush filemap_fdatawrite_wbc do_writepages ext4_writepages si (ext4_has_inline_data(inodo)) BUG_ON(ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) La causa principal de este problema es que destruimos los datos en l\u00ednea hasta que llamamos a ext4_writepages en el modo de asignaci\u00f3n de demora. Pero es posible que ya hayamos convertido de en l\u00ednea a extendido. Para resolver este problema, primero llamamos a filemap_flush.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/ext4/inline.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3c47d54170b6a678875566b1b8d6dcf57904e49b\",\"lessThan\":\"19918ec7717d87d5ab825884a46b26b21375d7ce\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c47d54170b6a678875566b1b8d6dcf57904e49b\",\"lessThan\":\"b2b78f5bf2d453dda3903955efee059260787a42\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c47d54170b6a678875566b1b8d6dcf57904e49b\",\"lessThan\":\"de1732b5c1693ad489c5d254f124f67cb775f37d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c47d54170b6a678875566b1b8d6dcf57904e49b\",\"lessThan\":\"73fd5b19285197078ee8a2e651d75d5b094a4de9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c47d54170b6a678875566b1b8d6dcf57904e49b\",\"lessThan\":\"1b061af037646c9cdb0afd8a8d2f1e1c06285866\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c47d54170b6a678875566b1b8d6dcf57904e49b\",\"lessThan\":\"18a759f7f99f0b65a08ff5b7e745fc405a42bde4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c47d54170b6a678875566b1b8d6dcf57904e49b\",\"lessThan\":\"1cde35417edc0370fb0179a4e38b78a15350a8d0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c47d54170b6a678875566b1b8d6dcf57904e49b\",\"lessThan\":\"013f12bdedb96816aaa27ee04349f4433d361f52\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c47d54170b6a678875566b1b8d6dcf57904e49b\",\"lessThan\":\"ef09ed5d37b84d18562b30cf7253e57062d0db05\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/ext4/inline.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.8\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.8\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.9.318\",\"lessThanOrEqual\":\"4.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.283\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.247\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.198\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.121\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.46\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.17.14\",\"lessThanOrEqual\":\"5.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.18.3\",\"lessThanOrEqual\":\"5.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.19\",\"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}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-617\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"4.9.318\",\"matchCriteriaId\":\"0D4D4067-974D-4560-8320-22FDA399E3F9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.10\",\"versionEndExcluding\":\"4.14.283\",\"matchCriteriaId\":\"D6823775-2653-4644-A0D4-4E6E68F10C65\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.247\",\"matchCriteriaId\":\"B8CFA0F4-2D75-41F4-9753-87944A08B53B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.198\",\"matchCriteriaId\":\"3EC49633-14DE-4EBD-BB80-76AE2E3EABB9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.121\",\"matchCriteriaId\":\"34ACD872-E5BC-401C-93D5-B357A62426E0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.46\",\"matchCriteriaId\":\"20D41697-0E8B-4B7D-8842-F17BF2AA21E1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.17.14\",\"matchCriteriaId\":\"15E2DD33-2255-4B76-9C15-04FF8CBAB252\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.18\",\"versionEndExcluding\":\"5.18.3\",\"matchCriteriaId\":\"8E122216-2E9E-4B3E-B7B8-D575A45BA3C2\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/013f12bdedb96816aaa27ee04349f4433d361f52\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/18a759f7f99f0b65a08ff5b7e745fc405a42bde4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/19918ec7717d87d5ab825884a46b26b21375d7ce\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1b061af037646c9cdb0afd8a8d2f1e1c06285866\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1cde35417edc0370fb0179a4e38b78a15350a8d0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/73fd5b19285197078ee8a2e651d75d5b094a4de9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b2b78f5bf2d453dda3903955efee059260787a42\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/de1732b5c1693ad489c5d254f124f67cb775f37d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ef09ed5d37b84d18562b30cf7253e57062d0db05\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:04:56+00:00",
      "cve": "CVE-2022-49347",
      "id": "CVE-2022-49347",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "286",
      "product_status:known_affected": "66",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ext4: fix bug_on in ext4_writepages",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49347.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T01:32:04Z",
      "cve": "CVE-2022-49347",
      "id": "CVE-2022-49347",
      "initial_release_date": "2025-02-27T03:08:23Z",
      "product_status:known_affected": "481",
      "product_status:known_not_affected": "196",
      "product_status:recommended": "375",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49347",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49347.json",
      "version": "64"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.