ext4: fix infinite loop when replaying fast_commit
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 5.10.224, 5.15.165, 6.1.103, 6.6.44, 6.10.3
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
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!
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
From 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 · fixed in 5ed0496e383cb6de120e56991385dce70bbb87c1; From 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 · fixed in 0619f7750f2b178a1309808832ab20d85e0ad121; From 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 · fixed in 181e63cd595c688194e07332f9944b3a63193de2; From 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 · fixed in c6e67df64783e99a657ef2b8c834ba2bf54c539c; From 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 · fixed in 81f819c537d29932e4b9267f02411cbc8b355178; From 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 · fixed in 907c3fe532253a6ef4eb9c4d67efb71fab58c706
- Linux Linux
5.10
- KernelLinux
From 5.10.0 · fixed in 5.10.224; From 5.11.0 · fixed in 5.15.165; From 5.16.0 · fixed in 6.1.103; From 6.2.0 · fixed in 6.6.44; From 6.7.0 · fixed in 6.10.3