AZL-110966
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-110966.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-110966
- Upstream
- Published
- 2026-10-23T13:17:31Z
- Modified
- 2026-10-24T14:16:40Z
- Summary
- CVE-2026-99072 affecting package kernel 6.6.157.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ipv4: stop route notification sizing when nexthop group shrinks
Commit 680aea08e78c ("net: ipv4: Emit notification when fib hardware flags are changed") added an RCU-only fib_nlmsg_size() call for asynchronous hardware flag notifications.
fib_nlmsg_size() checks fib_info_num_path() before each iteration, then fib_info_nhc() independently reloads nh->nh_grp. If RTM_NEWNEXTHOP replaces a group with fewer paths between those loads, fib_info_nhc() returns NULL and fib_nexthop_nlmsg_size() dereferences it.
Stop sizing when the indexed path is absent. Nexthop groups are dense, so the current snapshot has no later path.
- References