CVE-2022-50367
fs: fix UAF/GPF bug in nilfs_mdt_destroy
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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
- 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
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
In the Linux kernel, the following vulnerability has been resolved: fs: fix UAF/GPF bug in nilfs_mdt_destroy In alloc_inode, inode_init_always() could return -ENOMEM if security_inode_alloc() fails, which causes inode->i_private uninitialized. Then nilfs_is_metadata_file_inode() returns true and nilfs_free_inode() wrongly calls nilfs_mdt_destroy(), which frees the uninitialized inode->i_private and leads to crashes(e.g., UAF/GPF). Fix this by moving security_inode_alloc just prior to this_cpu_inc(nr_inodes)
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.12
References 9
git.kernel.org
- stable/c/d1ff475d7c83289d0a7faef346ea3bbf90818bad
- stable/c/c0aa76b0f17f59dd9c9d3463550a2986a1d592e4
- stable/c/ec2aab115eb38ac4992ea2fcc2a02fbe7af5cf48
- stable/c/70e4f70d54e0225f91814e8610477d65f33cefe4
- stable/c/1e555c3ed1fce4b278aaebe18a64a934cece57d8
- stable/c/64b79e632869ad3ef6c098a4731d559381da1115
- stable/c/81de80330fa6907aec32eb54c5619059e6e36452
- stable/c/2a96b532098284ecf8e4849b8b9e5fc7a28bdee9
- stable/c/2e488f13755ffbb60f307e991b27024716a33b29