CVE-2021-46956
- Source
- https://cve.org/CVERecord?id=CVE-2021-46956
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-46956.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-46956
- Downstream
- Related
- Published
- 2024-02-27T19:04:06.717Z
- Modified
- 2026-03-13T05:16:29.615817Z
- 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
- [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>] devicedriver_attach+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>] doinit_module+0x5c/0x260 [<000000003cdedab6>] _dosysfinitmodule+0xb5/0x120 [<00000000ad2f48c6>] dosyscall64+0x33/0x40 [<00000000809526b5>] entrySYSCALL64afterhwframe+0x44/0xae
- References
-
- https://git.kernel.org/stable/c/c79c5e0178922a9e092ec8fed026750f39dcaef4
- https://git.kernel.org/stable/c/d19555ff225d0896a33246a49279e6d578095f15
- https://git.kernel.org/stable/c/310efc95c72c13faf855c692d19cd4d054d827c8
- https://git.kernel.org/stable/c/5116e79fc6e6725b8acdad8b7e928a83ab7b47e6
- https://git.kernel.org/stable/c/9b9d60c0eb8ada99cce2a9ab5c15dffc523b01ae
Affected packages
Git /
Database specific
source
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-46956.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "5.4"
},
{
"fixed": "5.4.118"
}
]
},
{
"events": [
{
"introduced": "5.5"
},
{
"fixed": "5.10.36"
}
]
},
{
"events": [
{
"introduced": "5.11"
},
{
"fixed": "5.11.20"
}
]
},
{
"events": [
{
"introduced": "5.12"
},
{
"fixed": "5.12.3"
}
]
}
]