AZL-83720
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-83720.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-83720
- Upstream
- Published
- 2026-04-24T15:16:45Z
- Modified
- 2026-08-30T05:26:50Z
- Summary
- CVE-2026-31663 affecting package kernel 6.6.150.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
xfrm: hold dev ref until after transportfinish NFHOOK
After async crypto completes, xfrminputresume() calls devput() immediately on re-entry before the skb reaches transportfinish. The skb->dev pointer is then used inside NF_HOOK and its okfn, which can race with device teardown.
Remove the devput from the async resumption entry and instead drop the reference after the NFHOOK call in transportfinish, using a saved device pointer since NFHOOK may consume the skb. This covers NFDROP, NFQUEUE and NF_STOLEN paths that skip the okfn.
For non-transport exits (decaps, gro, drop) and secondary async return points, release the reference inline when async is set.
- References