DEBIAN-CVE-2022-49884
- Source
- https://security-tracker.debian.org/tracker/CVE-2022-49884
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49884.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2022-49884
- Upstream
- Published
- 2025-05-01T15:16:13Z
- Modified
- 2025-09-19T06:11:12Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved: KVM: Initialize gfntopfncache locks in dedicated helper Move the gfntopfncache lock initialization to another helper and call the new helper during VM/vCPU creation. There are race conditions possible due to kvmgfntopfncacheinit()'s ability to re-initialize the cache's locks. For example: a race between ioctl(KVMXENHVMEVTCHNSEND) and kvmgfntopfncacheinit() leads to a corrupted shinfo gpc lock. (thread 1) | (thread 2) | kvmxensetevtchnfast | readlockirqsave(&gpc->lock, ...) | | kvmgfntopfncacheinit | rwlockinit(&gpc->lock) readunlockirqrestore(&gpc->lock, ...) | Rename "cacheinit" and "cachedestroy" to activate+deactivate to avoid implying that the cache really is destroyed/freed. Note, there more races in the newly named kvmgpcactivate() that will be addressed separately. [sean: call out that this is a bug fix]
- 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
Debian:14 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source