DEBIAN-CVE-2025-38008
- Source
- https://security-tracker.debian.org/tracker/CVE-2025-38008
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-38008.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2025-38008
- Upstream
- Published
- 2025-06-18T10:15:32Z
- Modified
- 2025-09-25T04:38:43.965800Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved: mm/pagealloc: fix race condition in unaccepted memory handling The page allocator tracks the number of zones that have unaccepted memory using staticbranchenc/dec() and uses that static branch in hot paths to determine if it needs to deal with unaccepted memory. Borislav and Thomas pointed out that the tracking is racy: operations on staticbranch are not serialized against adding/removing unaccepted pages to/from the zone. Sanity checks inside staticbranch machinery detects it: WARNING: CPU: 0 PID: 10 at kernel/jumplabel.c:276 _statickeyslowdeccpuslocked+0x8e/0xa0 The comment around the WARN() explains the problem: /* * Warn about the '-1' case though; since that means a * decrement is concurrent with a first (0->1) increment. IOW * people are trying to disable something that wasn't yet fully * enabled. This suggests an ordering problem on the user side. */ The effect of this staticbranch optimization is only visible on microbenchmark. Instead of adding more complexity around it, remove it altogether.
- References
Affected packages
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