CVE-2022-49699
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49699
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49699.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-49699
- Related
- Published
- 2025-02-26T07:01:44Z
- Modified
- 2025-02-26T07:01:44Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
filemap: Handle sibling entries in filemapgetread_batch()
If a read races with an invalidation followed by another read, it is possible for a folio to be replaced with a higher-order folio. If that happens, we'll see a sibling entry for the new folio in the next iteration of the loop. This manifests as a NULL pointer dereference while holding the RCU read lock.
Handle this by simply returning. The next call will find the new folio and handle it correctly. The other ways of handling this rare race are more complex and it's just not worth it.
- References
Affected packages
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source