CVE-2022-48985

Source
https://nvd.nist.gov/vuln/detail/CVE-2022-48985
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48985.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-48985
Related
Published
2024-10-21T20:15:10Z
Modified
2024-11-07T19:35:06Z
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:

net: mana: Fix race on per-CQ variable napi work_done

After calling napicompletedone(), the NAPIFSTATESCHED bit may be cleared, and another CPU can start napi thread and access per-CQ variable, cq->workdone. If the other thread (for example, from busypoll) sets it to a value >= budget, this thread will continue to run when it should stop, and cause memory corruption and panic.

To fix this issue, save the per-CQ workdone variable in a local variable before napicompletedone(), so it won't be corrupted by a possible concurrent thread after napicomplete_done().

Also, add a flag bit to advertise to the NIC firmware: the NAPI workdone variable race is fixed, so the driver is able to reliably support features like busypoll.

References

Affected packages

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
6.1.4-1

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
6.1.4-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}