CVE-2021-46956

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-46956
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-46956.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-46956
Related
Published
2024-02-27T19:04:06Z
Modified
2024-09-18T01:00:22Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

virtiofs: fix memory leak in virtiofsprobe()

When accidentally passing twice the same tag to qemu, kmemleak ended up reporting a memory leak in virtiofs. Also, looking at the log I saw the following error (that's when I realised the duplicated tag):

virtiofs: probe of virtio5 failed with error -17

Here's the kmemleak log for reference:

unreferenced object 0xffff888103d47800 (size 1024): comm "systemd-udevd", pid 118, jiffies 4294893780 (age 18.340s) hex dump (first 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N.......... ff ff ff ff ff ff ff ff 80 90 02 a0 ff ff ff ff ................ backtrace: [<000000000ebb87c1>] virtiofsprobe+0x171/0x7ae [virtiofs] [<00000000f8aca419>] virtiodevprobe+0x15f/0x210 [<000000004d6baf3c>] reallyprobe+0xea/0x430 [<00000000a6ceeac8>] devicedriverattach+0xa8/0xb0 [<00000000196f47a7>] _driverattach+0x98/0x140 [<000000000b20601d>] busforeachdev+0x7b/0xc0 [<00000000399c7b7f>] busadddriver+0x11b/0x1f0 [<0000000032b09ba7>] driverregister+0x8f/0xe0 [<00000000cdd55998>] 0xffffffffa002c013 [<000000000ea196a2>] dooneinitcall+0x64/0x2e0 [<0000000008f727ce>] doinitmodule+0x5c/0x260 [<000000003cdedab6>] _dosysfinitmodule+0xb5/0x120 [<00000000ad2f48c6>] dosyscall64+0x33/0x40 [<00000000809526b5>] entrySYSCALL64after_hwframe+0x44/0xae

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.38-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.38-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.38-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}