CVE-2022-49348
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49348
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49348.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-49348
- Downstream
- Related
- Published
- 2025-02-26T02:11:02Z
- Modified
- 2025-10-21T08:53:56.352152Z
- Summary
- ext4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ext4: filter out EXT4FCREPLAY from on-disk superblock field s_state
The EXT4FCREPLAY bit in sbi->smountstate is used to indicate that we are in the middle of replay the fast commit journal. This was actually a mistake, since the sbi->smountinfo is initialized from es->sstate. Arguably smountstate is misleadingly named, but the name is historical --- smountstate and sstate dates back to ext2.
What should have been used is the ext4{set,clear,test}mountflag() inline functions, which sets EXT4MF* bits in sbi->smount_flags.
The problem with using EXT4FCREPLAY is that a maliciously corrupted superblock could result in EXT4FCREPLAY getting set in smountstate. This bypasses some sanity checks, and this can trigger a BUG() in ext4escacheextent(). As a easy-to-backport-fix, filter out the EXT4FCREPLAY bit for now. We should eventually transition away from EXT4FCREPLAY to something like EXT4MF_REPLAY.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/55b4dbb29054a05d839562f6d635ce05669b016d
- https://git.kernel.org/stable/c/af2f1932743fb52ebcb008ad7ac500d9df0aa796
- https://git.kernel.org/stable/c/b99fd73418350dea360da8311e87a6a7b0e15a4c
- https://git.kernel.org/stable/c/c878bea3c9d724ddfa05a813f30de3d25a0ba83f
- https://git.kernel.org/stable/c/cc5b09cb6dacd4b32640537929ab4ee8fb2b9e04
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2Fixedcc5b09cb6dacd4b32640537929ab4ee8fb2b9e04
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2Fixedb99fd73418350dea360da8311e87a6a7b0e15a4c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2Fixedaf2f1932743fb52ebcb008ad7ac500d9df0aa796
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2Fixed55b4dbb29054a05d839562f6d635ce05669b016d
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2Fixedc878bea3c9d724ddfa05a813f30de3d25a0ba83f
Affected versions
v5.*
v5.10
v5.10-rc1
v5.10-rc2
v5.10-rc3
v5.10-rc4
v5.10-rc5
v5.10-rc6
v5.10-rc7
v5.10.1
v5.10.10
v5.10.100
v5.10.101
v5.10.102
v5.10.103
v5.10.104
v5.10.105
v5.10.106
v5.10.107
v5.10.108
v5.10.109
v5.10.11
v5.10.110
v5.10.111
v5.10.112
v5.10.113
v5.10.114
v5.10.115
v5.10.116
v5.10.117
v5.10.118
v5.10.119
v5.10.12
v5.10.120
v5.10.13
v5.10.14
v5.10.15
v5.10.16
v5.10.17
v5.10.18
v5.10.19
v5.10.2
v5.10.20
v5.10.21
v5.10.22
v5.10.23
v5.10.24
v5.10.25
v5.10.26
v5.10.27
v5.10.28
v5.10.29
v5.10.3
v5.10.30
v5.10.31
v5.10.32
v5.10.33
v5.10.34
v5.10.35
v5.10.36
v5.10.37
v5.10.38
v5.10.39
v5.10.4
v5.10.40
v5.10.41
v5.10.42
v5.10.43
v5.10.44
v5.10.45
v5.10.46
v5.10.47
v5.10.48
v5.10.49
v5.10.5
v5.10.50
v5.10.51
v5.10.52
v5.10.53
v5.10.54
v5.10.55
v5.10.56
v5.10.57
v5.10.58
v5.10.59
v5.10.6
v5.10.60
v5.10.61
v5.10.62
v5.10.63
v5.10.64
v5.10.65
v5.10.66
v5.10.67
v5.10.68
v5.10.69
v5.10.7
v5.10.70
v5.10.71
v5.10.72
v5.10.73
v5.10.74
v5.10.75
v5.10.76
v5.10.77
v5.10.78
v5.10.79
v5.10.8
v5.10.80
v5.10.81
v5.10.82
v5.10.83
v5.10.84
v5.10.85
v5.10.86
v5.10.87
v5.10.88
v5.10.89
v5.10.9
v5.10.90
v5.10.91
v5.10.92
v5.10.93
v5.10.94
v5.10.95
v5.10.96
v5.10.97
v5.10.98
v5.10.99
v5.11
v5.11-rc1
v5.11-rc2
v5.11-rc3
v5.11-rc4
v5.11-rc5
v5.11-rc6
v5.11-rc7
v5.12
v5.12-rc1
v5.12-rc1-dontuse
v5.12-rc2
v5.12-rc3
v5.12-rc4
v5.12-rc5
v5.12-rc6
v5.12-rc7
v5.12-rc8
v5.13
v5.13-rc1
v5.13-rc2
v5.13-rc3
v5.13-rc4
v5.13-rc5
v5.13-rc6
v5.13-rc7
v5.14
v5.14-rc1
v5.14-rc2
v5.14-rc3
v5.14-rc4
v5.14-rc5
v5.14-rc6
v5.14-rc7
v5.15
v5.15-rc1
v5.15-rc2
v5.15-rc3
v5.15-rc4
v5.15-rc5
v5.15-rc6
v5.15-rc7
v5.15.1
v5.15.10
v5.15.11
v5.15.12
v5.15.13
v5.15.14
v5.15.15
v5.15.16
v5.15.17
v5.15.18
v5.15.19
v5.15.2
v5.15.20
v5.15.21
v5.15.22
v5.15.23
v5.15.24
v5.15.25
v5.15.26
v5.15.27
v5.15.28
v5.15.29
v5.15.3
v5.15.30
v5.15.31
v5.15.32
v5.15.33
v5.15.34
v5.15.35
v5.15.36
v5.15.37
v5.15.38
v5.15.39
v5.15.4
v5.15.40
v5.15.41
v5.15.42
v5.15.43
v5.15.44
v5.15.45
v5.15.5
v5.15.6
v5.15.7
v5.15.8
v5.15.9
v5.16
v5.16-rc1
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.17.1
v5.17.10
v5.17.11
v5.17.12
v5.17.13
v5.17.2
v5.17.3
v5.17.4
v5.17.5
v5.17.6
v5.17.7
v5.17.8
v5.17.9
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.18.1
v5.18.2
v5.9
v5.9-rc8
Database specific
vanir_signatures
[
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"signature_type": "Function",
"target": {
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"file": "fs/ext4/super.c"
}
},
{
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"id": "CVE-2022-49348-1164766e",
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"signature_type": "Function",
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"file": "fs/ext4/super.c"
}
},
{
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"target": {
"function": "__ext4_remount",
"file": "fs/ext4/super.c"
}
},
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]