CVE-2022-48985
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-48985
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48985.json
- JSON Data
- https://api.test.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
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source