CVE-2022-48931
See a problem?- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-48931
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48931.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-48931
- Related
- Published
- 2024-08-22T04:15:16Z
- Modified
- 2024-09-11T04:57:06.318225Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
configfs: fix a race in configfs{,un}registersubsystem()
When configfsregistersubsystem() or configfsunregistersubsystem() is executing linkgroup() or unlinkgroup(), it is possible that two processes add or delete list concurrently. Some unfortunate interleavings of them can cause kernel panic.
One of cases is: A --> B --> C --> D A <-- B <-- C <-- D
delete list_head *B | delete list_head *C--------------------------------|----------------------------------- configfsunregistersubsystem | configfsunregistersubsystem unlinkgroup | unlinkgroup unlinkobj | unlinkobj listdelinit | listdelinit _listdelentry | _listdelentry _listdel | _listdel // next == C | next->prev = prev | | next->prev = prev prev->next = next | | // prev == B | prev->next = next
Fix this by adding mutex when calling linkgroup() or unlinkgroup(), but parent configfssubsystem is NULL when configitem is root. So I create a mutex configfssubsystemmutex.
- References
-
- https://git.kernel.org/stable/c/3aadfd46858b1f64d4d6a0654b863e21aabff975
- https://git.kernel.org/stable/c/40805099af11f68c5ca7dbcfacf455da8f99f622
- https://git.kernel.org/stable/c/84ec758fb2daa236026506868c8796b0500c047d
- https://git.kernel.org/stable/c/a37024f7757c25550accdebf49e497ad6ae239fe
- https://git.kernel.org/stable/c/a7ab53d3c27dfe83bb594456b9f38a37796ec39b
- https://git.kernel.org/stable/c/b7e2b91fcb5c78c414e33dc8d50642e307ca0c5a
- https://git.kernel.org/stable/c/d1654de19d42f513b6cfe955cc77e7f427e05a77
- https://git.kernel.org/stable/c/e7a66dd2687758718eddd79b542a95cf3aa488cc
- https://security-tracker.debian.org/tracker/CVE-2022-48931
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed5.10.103-1
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