CVE-2022-49408
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix memory leak in parse_apply_sb_mount_options()
If processing the on-disk mount options fails after any memory was allocated in the ext4_fs_context, e.g. s_qf_names, then this memory is leaked. Fix this by calling ext4_fc_free() instead of kfree() directly.
Reproducer:
mkfs.ext4 -F /dev/vdc
tune2fs /dev/vdc -E mount_opts=usrjquota=file
echo clear > /sys/kernel/debug/kmemleak
mount /dev/vdc /vdc
echo scan > /sys/kernel/debug/kmemleak
sleep 5
echo scan > /sys/kernel/debug/kmemleak
cat /sys/kernel/debug/kmemleak
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 7edfd85b1ffd36593011dec96ab395912a340418 < 9ea3e6168948189cec31d0678d2b55b395f88491 | affected |
| Linux | Linux | 7edfd85b1ffd36593011dec96ab395912a340418 < f92ded66e9d0aa20b883a2a5183973abc8f41815 | affected |
| Linux | Linux | 7edfd85b1ffd36593011dec96ab395912a340418 < c069db76ed7b681c69159f44be96d2137e9ca989 | affected |
| Linux | Linux | 5.17 | affected |
| Linux | Linux | 0 < 5.17 | unaffected |
| Linux | Linux | 5.17.14 <= 5.17.* | unaffected |
| Linux | Linux | 5.18.3 <= 5.18.* | unaffected |
| Linux | Linux | 5.19 <= * | unaffected |
Weaknesses
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://git.kernel.org/stable/c/9ea3e6168948189cec31d0678d2b55b395f88491
- https://git.kernel.org/stable/c/f92ded66e9d0aa20b883a2a5183973abc8f41815
- https://git.kernel.org/stable/c/c069db76ed7b681c69159f44be96d2137e9ca989
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