CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
5.0%
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix infinite loop when replaying fast_commit
When doing fast_commit replay an infinite loop may occur due to an
uninitialized extent_status struct. ext4_ext_determine_insert_hole() does
not detect the replay and calls ext4_es_find_extent_range(), which will
return immediately without initializing the ‘es’ variable.
Because ‘es’ contains garbage, an integer overflow may happen causing an
infinite loop in this function, easily reproducible using fstest generic/039.
This commit fixes this issue by unconditionally initializing the structure
in function ext4_es_find_extent_range().
Thanks to Zhang Yi, for figuring out the real problem!
Vendor | Product | Version | CPE |
---|---|---|---|
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
git.kernel.org/stable/c/0619f7750f2b178a1309808832ab20d85e0ad121
git.kernel.org/stable/c/181e63cd595c688194e07332f9944b3a63193de2
git.kernel.org/stable/c/5ed0496e383cb6de120e56991385dce70bbb87c1
git.kernel.org/stable/c/81f819c537d29932e4b9267f02411cbc8b355178
git.kernel.org/stable/c/907c3fe532253a6ef4eb9c4d67efb71fab58c706
git.kernel.org/stable/c/c6e67df64783e99a657ef2b8c834ba2bf54c539c