nilfs2: protect access to buffers with no active references
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: protect access to buffers with no active references nilfs_lookup_dirty_data_buffers(), which iterates through the buffers attached to dirty data folios/pages, accesses the attached buffers without locking the folios/pages. For data cache, nilfs_clear_folio_dirty() may be called asynchronously when the file system degenerates to read only, so nilfs_lookup_dirty_data_buffers() still has the potential to cause use after free issues when buffers lose the protection of their dirty state midway due to this asynchronous clearing and are unintentionally freed by try_to_free_buffers(). Eliminate this race issue by adjusting the lock section in this function.
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
3.10
References 8
git.kernel.org
- stable/c/e1fc4a90a90ea8514246c45435662531975937d9
- stable/c/72cf688d0ce7e642b12ddc9b2a42524737ec1b4a
- stable/c/d8ff250e085a4c4cdda4ad1cdd234ed110393143
- stable/c/58c27fa7a610b6e8d44e6220e7dbddfbaccaf439
- stable/c/8e1b9201c9a24638cf09c6e1c9f224157328010b
- stable/c/4b08d23d7d1917bef4fbee8ad81372f49b006656
- stable/c/c437dfac9f7a5a46ac2a5e6d6acd3059e9f68188
- stable/c/367a9bffabe08c04f6d725032cce3d891b2b9e1a