CVE-2022-49329
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49329
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49329.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-49329
- Downstream
- Related
- Published
- 2025-02-26T02:10:50Z
- Modified
- 2025-10-15T20:53:13.470298Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- vduse: Fix NULL pointer dereference on sysfs access
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
vduse: Fix NULL pointer dereference on sysfs access
The control device has no drvdata. So we will get a NULL pointer dereference when accessing control device's msg_timeout attribute via sysfs:
[ 132.841881][ T3644] BUG: kernel NULL pointer dereference, address: 00000000000000f8 [ 132.850619][ T3644] RIP: 0010:msgtimeoutshow (drivers/vdpa/vdpauser/vdusedev.c:1271) [ 132.869447][ T3644] devattrshow (drivers/base/core.c:2094) [ 132.870215][ T3644] sysfskfseqshow (fs/sysfs/file.c:59) [ 132.871164][ T3644] ? deviceremovebinfile (drivers/base/core.c:2088) [ 132.872082][ T3644] kernfsseqshow (fs/kernfs/file.c:164) [ 132.872838][ T3644] seqreaditer (fs/seqfile.c:230) [ 132.873578][ T3644] ? _vmallocareanode (mm/vmalloc.c:3041) [ 132.874532][ T3644] kernfsfopreaditer (fs/kernfs/file.c:238) [ 132.875513][ T3644] _kernelread (fs/readwrite.c:440 (discriminator 1)) [ 132.876319][ T3644] kernelread (fs/readwrite.c:459) [ 132.877129][ T3644] kernelreadfile (fs/kernelreadfile.c:94) [ 132.877978][ T3644] kernelreadfilefromfd (include/linux/file.h:45 fs/kernelreadfile.c:186) [ 132.879019][ T3644] _dosysfinitmodule (kernel/module.c:4207) [ 132.879930][ T3644] _ia32sysfinitmodule (kernel/module.c:4189) [ 132.880930][ T3644] doint80syscall32 (arch/x86/entry/common.c:112 arch/x86/entry/common.c:132) [ 132.881847][ T3644] entryINT80compat (arch/x86/entry/entry64_compat.S:419)
To fix it, don't create the unneeded attribute for control device anymore.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/30fd1b56621e187346f65d01fe34870634b15188
- https://git.kernel.org/stable/c/3a7a81f4835dfda11f39fdd27586da14331896eb
- https://git.kernel.org/stable/c/b22fdee17ec62604060fb0fda5e1414b634666e1
- https://git.kernel.org/stable/c/b27ee76c74dc831d6e092eaebc2dfc9c0beed1c9
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedc8a6153b6c59d95c0e091f053f6f180952ade91eFixed3a7a81f4835dfda11f39fdd27586da14331896eb
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedc8a6153b6c59d95c0e091f053f6f180952ade91eFixed30fd1b56621e187346f65d01fe34870634b15188
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedc8a6153b6c59d95c0e091f053f6f180952ade91eFixedb22fdee17ec62604060fb0fda5e1414b634666e1
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedc8a6153b6c59d95c0e091f053f6f180952ade91eFixedb27ee76c74dc831d6e092eaebc2dfc9c0beed1c9