DEBIAN-CVE-2022-49554
- Source
- https://security-tracker.debian.org/tracker/CVE-2022-49554
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49554.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2022-49554
- Upstream
- Published
- 2025-02-26T07:01:31.223Z
- Modified
- 2026-06-11T09:02:38.886703791Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved: zsmalloc: fix races between asynchronous zspage free and page migration The asynchronous zspage free worker tries to lock a zspage's entire page list without defending against page migration. Since pages which haven't yet been locked can concurrently migrate off the zspage page list while lockzspage() churns away, lockzspage() can suffer from a few different lethal races. It can lock a page which no longer belongs to the zspage and unsafely dereference pageprivate(), it can unsafely dereference a torn pointer to the next page (since there's a data race), and it can observe a spurious NULL pointer to the next page and thus not lock all of the zspage's pages (since a single page migration will reconstruct the entire page list, and createpagechain() unconditionally zeroes out each list pointer in the process). Fix the races by using migratereadlock() in lockzspage() to synchronize with page migration.
- References
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source&distro=bullseye
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed5.10.120-1
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source&distro=bookworm
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source&distro=trixie
Debian:14 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source&distro=forky