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CVE-2022-49880 (GCVE-0-2022-49880)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:10 – Updated: 2026-05-11 19:08
VLAI
Title
ext4: fix warning in 'ext4_da_release_space'
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: fix warning in 'ext4_da_release_space' Syzkaller report issue as follows: EXT4-fs (loop0): Free/Dirty block details EXT4-fs (loop0): free_blocks=0 EXT4-fs (loop0): dirty_blocks=0 EXT4-fs (loop0): Block reservation details EXT4-fs (loop0): i_reserved_data_blocks=0 EXT4-fs warning (device loop0): ext4_da_release_space:1527: ext4_da_release_space: ino 18, to_free 1 with only 0 reserved data blocks ------------[ cut here ]------------ WARNING: CPU: 0 PID: 92 at fs/ext4/inode.c:1528 ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1524 Modules linked in: CPU: 0 PID: 92 Comm: kworker/u4:4 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: writeback wb_workfn (flush-7:0) RIP: 0010:ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1528 RSP: 0018:ffffc900015f6c90 EFLAGS: 00010296 RAX: 42215896cd52ea00 RBX: 0000000000000000 RCX: 42215896cd52ea00 RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 RBP: 1ffff1100e907d96 R08: ffffffff816aa79d R09: fffff520002bece5 R10: fffff520002bece5 R11: 1ffff920002bece4 R12: ffff888021fd2000 R13: ffff88807483ecb0 R14: 0000000000000001 R15: ffff88807483e740 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555569ba628 CR3: 000000000c88e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ext4_es_remove_extent+0x1ab/0x260 fs/ext4/extents_status.c:1461 mpage_release_unused_pages+0x24d/0xef0 fs/ext4/inode.c:1589 ext4_writepages+0x12eb/0x3be0 fs/ext4/inode.c:2852 do_writepages+0x3c3/0x680 mm/page-writeback.c:2469 __writeback_single_inode+0xd1/0x670 fs/fs-writeback.c:1587 writeback_sb_inodes+0xb3b/0x18f0 fs/fs-writeback.c:1870 wb_writeback+0x41f/0x7b0 fs/fs-writeback.c:2044 wb_do_writeback fs/fs-writeback.c:2187 [inline] wb_workfn+0x3cb/0xef0 fs/fs-writeback.c:2227 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 </TASK> Above issue may happens as follows: ext4_da_write_begin ext4_create_inline_data ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS); ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA); __ext4_ioctl ext4_ext_migrate -> will lead to eh->eh_entries not zero, and set extent flag ext4_da_write_begin ext4_da_convert_inline_data_to_extent ext4_da_write_inline_data_begin ext4_da_map_blocks ext4_insert_delayed_block if (!ext4_es_scan_clu(inode, &ext4_es_is_delonly, lblk)) if (!ext4_es_scan_clu(inode, &ext4_es_is_mapped, lblk)) ext4_clu_mapped(inode, EXT4_B2C(sbi, lblk)); -> will return 1 allocated = true; ext4_es_insert_delayed_block(inode, lblk, allocated); ext4_writepages mpage_map_and_submit_extent(handle, &mpd, &give_up_on_write); -> return -ENOSPC mpage_release_unused_pages(&mpd, give_up_on_write); -> give_up_on_write == 1 ext4_es_remove_extent ext4_da_release_space(inode, reserved); if (unlikely(to_free > ei->i_reserved_data_blocks)) -> to_free == 1 but ei->i_reserved_data_blocks == 0 -> then trigger warning as above To solve above issue, forbid inode do migrate which has inline data.
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 2025-10-01 16:11 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < 0de5ee103747fd3a24f1c010c79caabe35e8f0bb (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < c3bf1e95cfa7d950dc3c064d0c2e3d06b427bc63 (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < 890d738f569fa9412b70ba09f15407f17a52da20 (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < 72743d5598b9096950bbfd6a9b7f173d156eea97 (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < 5370b965b7a945bb8f48b9ee23d83a76a947902e (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < 0a43c015e98121c91a76154edf42280ce1a8a883 (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < 89bee03d2fb8c54119b38ac6c24e7d60fae036b6 (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < 1b8f787ef547230a3249bcf897221ef0cc78481b (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.8
Unaffected: 0 , < 3.8 (semver)
Unaffected: 4.9.333 , ≤ 4.9.* (semver)
Unaffected: 4.14.299 , ≤ 4.14.* (semver)
Unaffected: 4.19.265 , ≤ 4.19.* (semver)
Unaffected: 5.4.224 , ≤ 5.4.* (semver)
Unaffected: 5.10.154 , ≤ 5.10.* (semver)
Unaffected: 5.15.78 , ≤ 5.15.* (semver)
Unaffected: 6.0.8 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (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 \u0027ext4_da_release_space\u0027\n\nSyzkaller report issue as follows:\nEXT4-fs (loop0): Free/Dirty block details\nEXT4-fs (loop0): free_blocks=0\nEXT4-fs (loop0): dirty_blocks=0\nEXT4-fs (loop0): Block reservation details\nEXT4-fs (loop0): i_reserved_data_blocks=0\nEXT4-fs warning (device loop0): ext4_da_release_space:1527: ext4_da_release_space: ino 18, to_free 1 with only 0 reserved data blocks\n------------[ cut here ]------------\nWARNING: CPU: 0 PID: 92 at fs/ext4/inode.c:1528 ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1524\nModules linked in:\nCPU: 0 PID: 92 Comm: kworker/u4:4 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022\nWorkqueue: writeback wb_workfn (flush-7:0)\nRIP: 0010:ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1528\nRSP: 0018:ffffc900015f6c90 EFLAGS: 00010296\nRAX: 42215896cd52ea00 RBX: 0000000000000000 RCX: 42215896cd52ea00\nRDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000\nRBP: 1ffff1100e907d96 R08: ffffffff816aa79d R09: fffff520002bece5\nR10: fffff520002bece5 R11: 1ffff920002bece4 R12: ffff888021fd2000\nR13: ffff88807483ecb0 R14: 0000000000000001 R15: ffff88807483e740\nFS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00005555569ba628 CR3: 000000000c88e000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n ext4_es_remove_extent+0x1ab/0x260 fs/ext4/extents_status.c:1461\n mpage_release_unused_pages+0x24d/0xef0 fs/ext4/inode.c:1589\n ext4_writepages+0x12eb/0x3be0 fs/ext4/inode.c:2852\n do_writepages+0x3c3/0x680 mm/page-writeback.c:2469\n __writeback_single_inode+0xd1/0x670 fs/fs-writeback.c:1587\n writeback_sb_inodes+0xb3b/0x18f0 fs/fs-writeback.c:1870\n wb_writeback+0x41f/0x7b0 fs/fs-writeback.c:2044\n wb_do_writeback fs/fs-writeback.c:2187 [inline]\n wb_workfn+0x3cb/0xef0 fs/fs-writeback.c:2227\n process_one_work+0x877/0xdb0 kernel/workqueue.c:2289\n worker_thread+0xb14/0x1330 kernel/workqueue.c:2436\n kthread+0x266/0x300 kernel/kthread.c:376\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n \u003c/TASK\u003e\n\nAbove issue may happens as follows:\next4_da_write_begin\n  ext4_create_inline_data\n    ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);\n    ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA);\n__ext4_ioctl\n  ext4_ext_migrate -\u003e will lead to eh-\u003eeh_entries not zero, and set extent flag\next4_da_write_begin\n  ext4_da_convert_inline_data_to_extent\n    ext4_da_write_inline_data_begin\n      ext4_da_map_blocks\n        ext4_insert_delayed_block\n\t  if (!ext4_es_scan_clu(inode, \u0026ext4_es_is_delonly, lblk))\n\t    if (!ext4_es_scan_clu(inode, \u0026ext4_es_is_mapped, lblk))\n\t      ext4_clu_mapped(inode, EXT4_B2C(sbi, lblk)); -\u003e will return 1\n\t       allocated = true;\n          ext4_es_insert_delayed_block(inode, lblk, allocated);\next4_writepages\n  mpage_map_and_submit_extent(handle, \u0026mpd, \u0026give_up_on_write); -\u003e return -ENOSPC\n  mpage_release_unused_pages(\u0026mpd, give_up_on_write); -\u003e give_up_on_write == 1\n    ext4_es_remove_extent\n      ext4_da_release_space(inode, reserved);\n        if (unlikely(to_free \u003e ei-\u003ei_reserved_data_blocks))\n\t  -\u003e to_free == 1  but ei-\u003ei_reserved_data_blocks == 0\n\t  -\u003e then trigger warning as above\n\nTo solve above issue, forbid inode do migrate which has inline data."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:08:31.908Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0de5ee103747fd3a24f1c010c79caabe35e8f0bb"
        },
        {
          "url": "https://git.kernel.org/stable/c/c3bf1e95cfa7d950dc3c064d0c2e3d06b427bc63"
        },
        {
          "url": "https://git.kernel.org/stable/c/890d738f569fa9412b70ba09f15407f17a52da20"
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        {
          "url": "https://git.kernel.org/stable/c/72743d5598b9096950bbfd6a9b7f173d156eea97"
        },
        {
          "url": "https://git.kernel.org/stable/c/5370b965b7a945bb8f48b9ee23d83a76a947902e"
        },
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          "url": "https://git.kernel.org/stable/c/0a43c015e98121c91a76154edf42280ce1a8a883"
        },
        {
          "url": "https://git.kernel.org/stable/c/89bee03d2fb8c54119b38ac6c24e7d60fae036b6"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b8f787ef547230a3249bcf897221ef0cc78481b"
        }
      ],
      "title": "ext4: fix warning in \u0027ext4_da_release_space\u0027",
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    "cveId": "CVE-2022-49880",
    "datePublished": "2025-05-01T14:10:27.947Z",
    "dateReserved": "2025-05-01T14:05:17.239Z",
    "dateUpdated": "2026-05-11T19:08:31.908Z",
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          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix warning in \u0027ext4_da_release_space\u0027\n\nSyzkaller report issue as follows:\nEXT4-fs (loop0): Free/Dirty block details\nEXT4-fs (loop0): free_blocks=0\nEXT4-fs (loop0): dirty_blocks=0\nEXT4-fs (loop0): Block reservation details\nEXT4-fs (loop0): i_reserved_data_blocks=0\nEXT4-fs warning (device loop0): ext4_da_release_space:1527: ext4_da_release_space: ino 18, to_free 1 with only 0 reserved data blocks\n------------[ cut here ]------------\nWARNING: CPU: 0 PID: 92 at fs/ext4/inode.c:1528 ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1524\nModules linked in:\nCPU: 0 PID: 92 Comm: kworker/u4:4 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022\nWorkqueue: writeback wb_workfn (flush-7:0)\nRIP: 0010:ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1528\nRSP: 0018:ffffc900015f6c90 EFLAGS: 00010296\nRAX: 42215896cd52ea00 RBX: 0000000000000000 RCX: 42215896cd52ea00\nRDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000\nRBP: 1ffff1100e907d96 R08: ffffffff816aa79d R09: fffff520002bece5\nR10: fffff520002bece5 R11: 1ffff920002bece4 R12: ffff888021fd2000\nR13: ffff88807483ecb0 R14: 0000000000000001 R15: ffff88807483e740\nFS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00005555569ba628 CR3: 000000000c88e000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n ext4_es_remove_extent+0x1ab/0x260 fs/ext4/extents_status.c:1461\n mpage_release_unused_pages+0x24d/0xef0 fs/ext4/inode.c:1589\n ext4_writepages+0x12eb/0x3be0 fs/ext4/inode.c:2852\n do_writepages+0x3c3/0x680 mm/page-writeback.c:2469\n __writeback_single_inode+0xd1/0x670 fs/fs-writeback.c:1587\n writeback_sb_inodes+0xb3b/0x18f0 fs/fs-writeback.c:1870\n wb_writeback+0x41f/0x7b0 fs/fs-writeback.c:2044\n wb_do_writeback fs/fs-writeback.c:2187 [inline]\n wb_workfn+0x3cb/0xef0 fs/fs-writeback.c:2227\n process_one_work+0x877/0xdb0 kernel/workqueue.c:2289\n worker_thread+0xb14/0x1330 kernel/workqueue.c:2436\n kthread+0x266/0x300 kernel/kthread.c:376\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n \u003c/TASK\u003e\n\nAbove issue may happens as follows:\next4_da_write_begin\n  ext4_create_inline_data\n    ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);\n    ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA);\n__ext4_ioctl\n  ext4_ext_migrate -\u003e will lead to eh-\u003eeh_entries not zero, and set extent flag\next4_da_write_begin\n  ext4_da_convert_inline_data_to_extent\n    ext4_da_write_inline_data_begin\n      ext4_da_map_blocks\n        ext4_insert_delayed_block\n\t  if (!ext4_es_scan_clu(inode, \u0026ext4_es_is_delonly, lblk))\n\t    if (!ext4_es_scan_clu(inode, \u0026ext4_es_is_mapped, lblk))\n\t      ext4_clu_mapped(inode, EXT4_B2C(sbi, lblk)); -\u003e will return 1\n\t       allocated = true;\n          ext4_es_insert_delayed_block(inode, lblk, allocated);\next4_writepages\n  mpage_map_and_submit_extent(handle, \u0026mpd, \u0026give_up_on_write); -\u003e return -ENOSPC\n  mpage_release_unused_pages(\u0026mpd, give_up_on_write); -\u003e give_up_on_write == 1\n    ext4_es_remove_extent\n      ext4_da_release_space(inode, reserved);\n        if (unlikely(to_free \u003e ei-\u003ei_reserved_data_blocks))\n\t  -\u003e to_free == 1  but ei-\u003ei_reserved_data_blocks == 0\n\t  -\u003e then trigger warning as above\n\nTo solve above issue, forbid inode do migrate which has inline data."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: correcci\u00f3n de advertencia en \u0027ext4_da_release_space\u0027 Syzkaller informa del problema de la siguiente manera: EXT4-fs (loop0): Detalles del bloque libre/sucio EXT4-fs (loop0): free_blocks=0 EXT4-fs (loop0): dirty_blocks=0 EXT4-fs (loop0): Detalles de la reserva del bloque EXT4-fs (loop0): i_reserved_data_blocks=0 Advertencia de EXT4-fs (dispositivo loop0): ext4_da_release_space:1527: ext4_da_release_space: ino 18, to_free 1 con solo 0 bloques de datos reservados ------------[ cortar aqu\u00ed ]------------ ADVERTENCIA: CPU: 0 PID: 92 en fs/ext4/inode.c:1528 ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1524 M\u00f3dulos vinculados: CPU: 0 PID: 92 Comm: kworker/u4:4 No contaminado 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 22/09/2022 Cola de trabajo: escritura diferida wb_workfn (flush-7:0) RIP: 0010:ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1528 RSP: 0018:ffffc900015f6c90 EFLAGS: 00010296 RAX: 42215896cd52ea00 RBX: 0000000000000000 RCX: 42215896cd52ea00 RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 RBP: 1ffff1100e907d96 R08: ffffffff816aa79d R09: fffff520002bece5 R10: fffff520002bece5 R11: 1ffff920002bece4 R12: ffff888021fd2000 R13: ffff88807483ecb0 R14: 0000000000000001 R15: ffff88807483e740FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555569ba628 CR3: 000000000c88e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Rastreo de llamadas:  ext4_es_remove_extent+0x1ab/0x260 fs/ext4/extents_status.c:1461 mpage_release_unused_pages+0x24d/0xef0 fs/ext4/inode.c:1589 ext4_writepages+0x12eb/0x3be0 fs/ext4/inode.c:2852 do_writepages+0x3c3/0x680 mm/page-writeback.c:2469 __writeback_single_inode+0xd1/0x670 fs/fs-writeback.c:1587 writeback_sb_inodes+0xb3b/0x18f0 fs/fs-writeback.c:1870 wb_writeback+0x41f/0x7b0 fs/fs-writeback.c:2044 wb_do_writeback fs/fs-writeback.c:2187 [inline] wb_workfn+0x3cb/0xef0 fs/fs-writeback.c:2227 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306  El problema anterior puede ocurrir de la siguiente manera: ext4_da_write_begin ext4_create_inline_data ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS); ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA); __ext4_ioctl ext4_ext_migrate -\u0026gt; har\u00e1 que eh-\u0026gt;eh_entries no sea cero y establecer\u00e1 el indicador de extensi\u00f3n ext4_da_write_begin ext4_da_convert_inline_data_to_extent ext4_da_write_inline_data_begin ext4_da_map_blocks ext4_insert_delayed_block si (!ext4_es_scan_clu(inodo, \u0026amp;ext4_es_is_delonly, lblk)) si (!ext4_es_scan_clu(inodo, \u0026amp;ext4_es_is_mapped, lblk)) ext4_clu_mapped(inodo, EXT4_B2C(sbi, lblk)); -\u0026gt; devolver\u00e1 1 asignado = verdadero; ext4_es_insert_delayed_block(inodo, lblk, asignado); ext4_writepages mpage_map_and_submit_extent(handle, \u0026amp;mpd, \u0026amp;give_up_on_write); -\u0026gt; return -ENOSPC mpage_release_unused_pages(\u0026amp;mpd, give_up_on_write); -\u0026gt; give_up_on_write == 1 ext4_es_remove_extent ext4_da_release_space(inode, reserved); if (unlikely(to_free \u0026gt; ei-\u0026gt;i_reserved_data_blocks)) -\u0026gt; to_free == 1 but ei-\u0026gt;i_reserved_data_blocks == 0 -\u0026gt; then trigger WARNING Como se indica arriba, para resolver el problema anterior, proh\u00edba migrar los inodes que tienen datos en l\u00ednea."
          }
        ],
        "id": "CVE-2022-49880",
        "lastModified": "2026-06-17T05:19:24.327",
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                  "lessThan": "890d738f569fa9412b70ba09f15407f17a52da20",
                  "status": "affected",
                  "version": "67cf5b09a46f72e048501b84996f2f77bc42e947",
                  "versionType": "git"
                },
                {
                  "lessThan": "72743d5598b9096950bbfd6a9b7f173d156eea97",
                  "status": "affected",
                  "version": "67cf5b09a46f72e048501b84996f2f77bc42e947",
                  "versionType": "git"
                },
                {
                  "lessThan": "5370b965b7a945bb8f48b9ee23d83a76a947902e",
                  "status": "affected",
                  "version": "67cf5b09a46f72e048501b84996f2f77bc42e947",
                  "versionType": "git"
                },
                {
                  "lessThan": "0a43c015e98121c91a76154edf42280ce1a8a883",
                  "status": "affected",
                  "version": "67cf5b09a46f72e048501b84996f2f77bc42e947",
                  "versionType": "git"
                },
                {
                  "lessThan": "89bee03d2fb8c54119b38ac6c24e7d60fae036b6",
                  "status": "affected",
                  "version": "67cf5b09a46f72e048501b84996f2f77bc42e947",
                  "versionType": "git"
                },
                {
                  "lessThan": "1b8f787ef547230a3249bcf897221ef0cc78481b",
                  "status": "affected",
                  "version": "67cf5b09a46f72e048501b84996f2f77bc42e947",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "fs/ext4/migrate.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "3.8"
                },
                {
                  "lessThan": "3.8",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.9.*",
                  "status": "unaffected",
                  "version": "4.9.333",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.14.*",
                  "status": "unaffected",
                  "version": "4.14.299",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.19.*",
                  "status": "unaffected",
                  "version": "4.19.265",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.224",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.154",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.78",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.0.*",
                  "status": "unaffected",
                  "version": "6.0.8",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.1",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.9.333",
                      "versionStartIncluding": "3.8",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.14.299",
                      "versionStartIncluding": "3.8",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.19.265",
                      "versionStartIncluding": "3.8",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.224",
                      "versionStartIncluding": "3.8",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.154",
                      "versionStartIncluding": "3.8",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.78",
                      "versionStartIncluding": "3.8",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.0.8",
                      "versionStartIncluding": "3.8",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1",
                      "versionStartIncluding": "3.8",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix warning in \u0027ext4_da_release_space\u0027\n\nSyzkaller report issue as follows:\nEXT4-fs (loop0): Free/Dirty block details\nEXT4-fs (loop0): free_blocks=0\nEXT4-fs (loop0): dirty_blocks=0\nEXT4-fs (loop0): Block reservation details\nEXT4-fs (loop0): i_reserved_data_blocks=0\nEXT4-fs warning (device loop0): ext4_da_release_space:1527: ext4_da_release_space: ino 18, to_free 1 with only 0 reserved data blocks\n------------[ cut here ]------------\nWARNING: CPU: 0 PID: 92 at fs/ext4/inode.c:1528 ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1524\nModules linked in:\nCPU: 0 PID: 92 Comm: kworker/u4:4 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022\nWorkqueue: writeback wb_workfn (flush-7:0)\nRIP: 0010:ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1528\nRSP: 0018:ffffc900015f6c90 EFLAGS: 00010296\nRAX: 42215896cd52ea00 RBX: 0000000000000000 RCX: 42215896cd52ea00\nRDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000\nRBP: 1ffff1100e907d96 R08: ffffffff816aa79d R09: fffff520002bece5\nR10: fffff520002bece5 R11: 1ffff920002bece4 R12: ffff888021fd2000\nR13: ffff88807483ecb0 R14: 0000000000000001 R15: ffff88807483e740\nFS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00005555569ba628 CR3: 000000000c88e000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n ext4_es_remove_extent+0x1ab/0x260 fs/ext4/extents_status.c:1461\n mpage_release_unused_pages+0x24d/0xef0 fs/ext4/inode.c:1589\n ext4_writepages+0x12eb/0x3be0 fs/ext4/inode.c:2852\n do_writepages+0x3c3/0x680 mm/page-writeback.c:2469\n __writeback_single_inode+0xd1/0x670 fs/fs-writeback.c:1587\n writeback_sb_inodes+0xb3b/0x18f0 fs/fs-writeback.c:1870\n wb_writeback+0x41f/0x7b0 fs/fs-writeback.c:2044\n wb_do_writeback fs/fs-writeback.c:2187 [inline]\n wb_workfn+0x3cb/0xef0 fs/fs-writeback.c:2227\n process_one_work+0x877/0xdb0 kernel/workqueue.c:2289\n worker_thread+0xb14/0x1330 kernel/workqueue.c:2436\n kthread+0x266/0x300 kernel/kthread.c:376\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n \u003c/TASK\u003e\n\nAbove issue may happens as follows:\next4_da_write_begin\n  ext4_create_inline_data\n    ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);\n    ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA);\n__ext4_ioctl\n  ext4_ext_migrate -\u003e will lead to eh-\u003eeh_entries not zero, and set extent flag\next4_da_write_begin\n  ext4_da_convert_inline_data_to_extent\n    ext4_da_write_inline_data_begin\n      ext4_da_map_blocks\n        ext4_insert_delayed_block\n\t  if (!ext4_es_scan_clu(inode, \u0026ext4_es_is_delonly, lblk))\n\t    if (!ext4_es_scan_clu(inode, \u0026ext4_es_is_mapped, lblk))\n\t      ext4_clu_mapped(inode, EXT4_B2C(sbi, lblk)); -\u003e will return 1\n\t       allocated = true;\n          ext4_es_insert_delayed_block(inode, lblk, allocated);\next4_writepages\n  mpage_map_and_submit_extent(handle, \u0026mpd, \u0026give_up_on_write); -\u003e return -ENOSPC\n  mpage_release_unused_pages(\u0026mpd, give_up_on_write); -\u003e give_up_on_write == 1\n    ext4_es_remove_extent\n      ext4_da_release_space(inode, reserved);\n        if (unlikely(to_free \u003e ei-\u003ei_reserved_data_blocks))\n\t  -\u003e to_free == 1  but ei-\u003ei_reserved_data_blocks == 0\n\t  -\u003e then trigger warning as above\n\nTo solve above issue, forbid inode do migrate which has inline data."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T19:08:31.908Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/0de5ee103747fd3a24f1c010c79caabe35e8f0bb"
            },
            {
              "url": "https://git.kernel.org/stable/c/c3bf1e95cfa7d950dc3c064d0c2e3d06b427bc63"
            },
            {
              "url": "https://git.kernel.org/stable/c/890d738f569fa9412b70ba09f15407f17a52da20"
            },
            {
              "url": "https://git.kernel.org/stable/c/72743d5598b9096950bbfd6a9b7f173d156eea97"
            },
            {
              "url": "https://git.kernel.org/stable/c/5370b965b7a945bb8f48b9ee23d83a76a947902e"
            },
            {
              "url": "https://git.kernel.org/stable/c/0a43c015e98121c91a76154edf42280ce1a8a883"
            },
            {
              "url": "https://git.kernel.org/stable/c/89bee03d2fb8c54119b38ac6c24e7d60fae036b6"
            },
            {
              "url": "https://git.kernel.org/stable/c/1b8f787ef547230a3249bcf897221ef0cc78481b"
            }
          ],
          "title": "ext4: fix warning in \u0027ext4_da_release_space\u0027",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-49880",
        "datePublished": "2025-05-01T14:10:27.947Z",
        "dateReserved": "2025-05-01T14:05:17.239Z",
        "dateUpdated": "2026-05-11T19:08:31.908Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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  • 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.
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  • 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.


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