FKIE_CVE-2022-50782
Vulnerability from fkie_nvd - Published: 2025-12-24 13:16 - Updated: 2026-06-17 05:24
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix bug_on in __es_tree_search caused by bad quota inode
We got a issue as fllows:
==================================================================
kernel BUG at fs/ext4/extents_status.c:202!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 810 Comm: mount Not tainted 6.1.0-rc1-next-g9631525255e3 #352
RIP: 0010:__es_tree_search.isra.0+0xb8/0xe0
RSP: 0018:ffffc90001227900 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 0000000077512a0f RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000002a10 RDI: ffff8881004cd0c8
RBP: ffff888177512ac8 R08: 47ffffffffffffff R09: 0000000000000001
R10: 0000000000000001 R11: 00000000000679af R12: 0000000000002a10
R13: ffff888177512d88 R14: 0000000077512a10 R15: 0000000000000000
FS: 00007f4bd76dbc40(0000)GS:ffff88842fd00000(0000)knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005653bf993cf8 CR3: 000000017bfdf000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
ext4_es_cache_extent+0xe2/0x210
ext4_cache_extents+0xd2/0x110
ext4_find_extent+0x5d5/0x8c0
ext4_ext_map_blocks+0x9c/0x1d30
ext4_map_blocks+0x431/0xa50
ext4_getblk+0x82/0x340
ext4_bread+0x14/0x110
ext4_quota_read+0xf0/0x180
v2_read_header+0x24/0x90
v2_check_quota_file+0x2f/0xa0
dquot_load_quota_sb+0x26c/0x760
dquot_load_quota_inode+0xa5/0x190
ext4_enable_quotas+0x14c/0x300
__ext4_fill_super+0x31cc/0x32c0
ext4_fill_super+0x115/0x2d0
get_tree_bdev+0x1d2/0x360
ext4_get_tree+0x19/0x30
vfs_get_tree+0x26/0xe0
path_mount+0x81d/0xfc0
do_mount+0x8d/0xc0
__x64_sys_mount+0xc0/0x160
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
</TASK>
==================================================================
Above issue may happen as follows:
-------------------------------------
ext4_fill_super
ext4_orphan_cleanup
ext4_enable_quotas
ext4_quota_enable
ext4_iget --> get error inode <5>
ext4_ext_check_inode --> Wrong imode makes it escape inspection
make_bad_inode(inode) --> EXT4_BOOT_LOADER_INO set imode
dquot_load_quota_inode
vfs_setup_quota_inode --> check pass
dquot_load_quota_sb
v2_check_quota_file
v2_read_header
ext4_quota_read
ext4_bread
ext4_getblk
ext4_map_blocks
ext4_ext_map_blocks
ext4_find_extent
ext4_cache_extents
ext4_es_cache_extent
__es_tree_search.isra.0
ext4_es_end --> Wrong extents trigger BUG_ON
In the above issue, s_usr_quota_inum is set to 5, but inode<5> contains
incorrect imode and disordered extents. Because 5 is EXT4_BOOT_LOADER_INO,
the ext4_ext_check_inode check in the ext4_iget function can be bypassed,
finally, the extents that are not checked trigger the BUG_ON in the
__es_tree_search function. To solve this issue, check whether the inode is
bad_inode in vfs_setup_quota_inode().
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/quota/dquot.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "fb1d3b4107b4837b4a0dbbf01954269bd6acfdc3",
"status": "affected",
"version": "393d1d1d76933886d5e1ce603214c9987589c6d5",
"versionType": "git"
},
{
"lessThan": "1d5524832ff204b8a8cd54ae1628b2122f6e9a8d",
"status": "affected",
"version": "393d1d1d76933886d5e1ce603214c9987589c6d5",
"versionType": "git"
},
{
"lessThan": "98004f926d27eaccdd2d336b7916a42e07392da1",
"status": "affected",
"version": "393d1d1d76933886d5e1ce603214c9987589c6d5",
"versionType": "git"
},
{
"lessThan": "0dcbf4dc3d54aab5990952cfd832042fb300dbe3",
"status": "affected",
"version": "393d1d1d76933886d5e1ce603214c9987589c6d5",
"versionType": "git"
},
{
"lessThan": "794c9175db1f2e5d2a28c326f10bd024dbd944f8",
"status": "affected",
"version": "393d1d1d76933886d5e1ce603214c9987589c6d5",
"versionType": "git"
},
{
"lessThan": "1daff79463d7d76096c84c57cddc30c5d4be2226",
"status": "affected",
"version": "393d1d1d76933886d5e1ce603214c9987589c6d5",
"versionType": "git"
},
{
"lessThan": "d323877484765aaacbb2769b06e355c2041ed115",
"status": "affected",
"version": "393d1d1d76933886d5e1ce603214c9987589c6d5",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/quota/dquot.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.10"
},
{
"lessThan": "3.10",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.270",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.229",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.163",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.87",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"version": "6.0.18",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix bug_on in __es_tree_search caused by bad quota inode\n\nWe got a issue as fllows:\n==================================================================\n kernel BUG at fs/ext4/extents_status.c:202!\n invalid opcode: 0000 [#1] PREEMPT SMP\n CPU: 1 PID: 810 Comm: mount Not tainted 6.1.0-rc1-next-g9631525255e3 #352\n RIP: 0010:__es_tree_search.isra.0+0xb8/0xe0\n RSP: 0018:ffffc90001227900 EFLAGS: 00010202\n RAX: 0000000000000000 RBX: 0000000077512a0f RCX: 0000000000000000\n RDX: 0000000000000002 RSI: 0000000000002a10 RDI: ffff8881004cd0c8\n RBP: ffff888177512ac8 R08: 47ffffffffffffff R09: 0000000000000001\n R10: 0000000000000001 R11: 00000000000679af R12: 0000000000002a10\n R13: ffff888177512d88 R14: 0000000077512a10 R15: 0000000000000000\n FS: 00007f4bd76dbc40(0000)GS:ffff88842fd00000(0000)knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00005653bf993cf8 CR3: 000000017bfdf000 CR4: 00000000000006e0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n \u003cTASK\u003e\n ext4_es_cache_extent+0xe2/0x210\n ext4_cache_extents+0xd2/0x110\n ext4_find_extent+0x5d5/0x8c0\n ext4_ext_map_blocks+0x9c/0x1d30\n ext4_map_blocks+0x431/0xa50\n ext4_getblk+0x82/0x340\n ext4_bread+0x14/0x110\n ext4_quota_read+0xf0/0x180\n v2_read_header+0x24/0x90\n v2_check_quota_file+0x2f/0xa0\n dquot_load_quota_sb+0x26c/0x760\n dquot_load_quota_inode+0xa5/0x190\n ext4_enable_quotas+0x14c/0x300\n __ext4_fill_super+0x31cc/0x32c0\n ext4_fill_super+0x115/0x2d0\n get_tree_bdev+0x1d2/0x360\n ext4_get_tree+0x19/0x30\n vfs_get_tree+0x26/0xe0\n path_mount+0x81d/0xfc0\n do_mount+0x8d/0xc0\n __x64_sys_mount+0xc0/0x160\n do_syscall_64+0x35/0x80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n \u003c/TASK\u003e\n==================================================================\n\nAbove issue may happen as follows:\n-------------------------------------\next4_fill_super\n ext4_orphan_cleanup\n ext4_enable_quotas\n ext4_quota_enable\n ext4_iget --\u003e get error inode \u003c5\u003e\n ext4_ext_check_inode --\u003e Wrong imode makes it escape inspection\n make_bad_inode(inode) --\u003e EXT4_BOOT_LOADER_INO set imode\n dquot_load_quota_inode\n vfs_setup_quota_inode --\u003e check pass\n dquot_load_quota_sb\n v2_check_quota_file\n v2_read_header\n ext4_quota_read\n ext4_bread\n ext4_getblk\n ext4_map_blocks\n ext4_ext_map_blocks\n ext4_find_extent\n ext4_cache_extents\n ext4_es_cache_extent\n __es_tree_search.isra.0\n ext4_es_end --\u003e Wrong extents trigger BUG_ON\n\nIn the above issue, s_usr_quota_inum is set to 5, but inode\u003c5\u003e contains\nincorrect imode and disordered extents. Because 5 is EXT4_BOOT_LOADER_INO,\nthe ext4_ext_check_inode check in the ext4_iget function can be bypassed,\nfinally, the extents that are not checked trigger the BUG_ON in the\n__es_tree_search function. To solve this issue, check whether the inode is\nbad_inode in vfs_setup_quota_inode()."
}
],
"id": "CVE-2022-50782",
"lastModified": "2026-06-17T05:24:10.313",
"metrics": {},
"published": "2025-12-24T13:16:05.047",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/0dcbf4dc3d54aab5990952cfd832042fb300dbe3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/1d5524832ff204b8a8cd54ae1628b2122f6e9a8d"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/1daff79463d7d76096c84c57cddc30c5d4be2226"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/794c9175db1f2e5d2a28c326f10bd024dbd944f8"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/98004f926d27eaccdd2d336b7916a42e07392da1"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/d323877484765aaacbb2769b06e355c2041ed115"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/fb1d3b4107b4837b4a0dbbf01954269bd6acfdc3"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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- 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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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.
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