AZL-85803
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-85803.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-85803
- Upstream
- Published
- 2026-05-06T12:16:38Z
- Modified
- 2026-09-14T05:26:59Z
- Summary
- CVE-2026-43198 affecting package kernel 6.6.150.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
tcp: fix potential race in tcp_v6_syn_recv_sock()
Code in tcp_v6_syn_recv_sock() after the call to tcp_v4_syn_recv_sock() is done too late.
After tcp_v4_syn_recv_sock(), the child socket is already visible from TCP ehash table and other cpus might use it.
Since newinet->pinet6 is still pointing to the listener ipv6_pinfo bad things can happen as syzbot found.
Move the problematic code in tcp_v6_mapped_child_init() and call this new helper from tcp_v4_syn_recv_sock() before the ehash insertion.
This allows the removal of one tcp_sync_mss(), since tcp_v4_syn_recv_sock() will call it with the correct context.
- References