Alma Linux: CVE-2024-35839: Moderate: kernel security update (Multiple Advisories)
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: bridge: replace physindev with physinif in nf_bridge_info An skb can be added to a neigh->arp_queue while waiting for an arp reply. Where original skb's skb->dev can be different to neigh's neigh->dev. For instance in case of bridging dnated skb from one veth to another, the skb would be added to a neigh->arp_queue of the bridge. As skb->dev can be reset back to nf_bridge->physindev and used, and as there is no explicit mechanism that prevents this physindev from been freed under us (for instance neigh_flush_dev doesn't cleanup skbs from different device's neigh queue) we can crash on e.g. this stack: arp_process neigh_update skb = __skb_dequeue(&neigh->arp_queue) neigh_resolve_output(..., skb) ... br_nf_dev_xmit br_nf_pre_routing_finish_bridge_slow skb->dev = nf_bridge->physindev br_handle_frame_finish Let's use plain ifindex instead of net_device link. To peek into the original net_device we will use dev_get_by_index_rcu(). Thus either we get device and are safe to use it or we don't get it and drop skb.
Solution(s)
- alma-upgrade-bpftool
- alma-upgrade-kernel
- alma-upgrade-kernel-64k
- alma-upgrade-kernel-64k-core
- alma-upgrade-kernel-64k-debug
- alma-upgrade-kernel-64k-debug-core
- alma-upgrade-kernel-64k-debug-devel
- alma-upgrade-kernel-64k-debug-devel-matched
- alma-upgrade-kernel-64k-debug-modules
- alma-upgrade-kernel-64k-debug-modules-core
- alma-upgrade-kernel-64k-debug-modules-extra
- alma-upgrade-kernel-64k-devel
- alma-upgrade-kernel-64k-devel-matched
- alma-upgrade-kernel-64k-modules
- alma-upgrade-kernel-64k-modules-core
- alma-upgrade-kernel-64k-modules-extra
- alma-upgrade-kernel-abi-stablelists
- alma-upgrade-kernel-core
- alma-upgrade-kernel-cross-headers
- alma-upgrade-kernel-debug
- alma-upgrade-kernel-debug-core
- alma-upgrade-kernel-debug-devel
- alma-upgrade-kernel-debug-devel-matched
- alma-upgrade-kernel-debug-modules
- alma-upgrade-kernel-debug-modules-core
- alma-upgrade-kernel-debug-modules-extra
- alma-upgrade-kernel-debug-uki-virt
- alma-upgrade-kernel-devel
- alma-upgrade-kernel-devel-matched
- alma-upgrade-kernel-doc
- alma-upgrade-kernel-headers
- alma-upgrade-kernel-modules
- alma-upgrade-kernel-modules-core
- alma-upgrade-kernel-modules-extra
- alma-upgrade-kernel-rt
- alma-upgrade-kernel-rt-core
- alma-upgrade-kernel-rt-debug
- alma-upgrade-kernel-rt-debug-core
- alma-upgrade-kernel-rt-debug-devel
- alma-upgrade-kernel-rt-debug-modules
- alma-upgrade-kernel-rt-debug-modules-core
- alma-upgrade-kernel-rt-debug-modules-extra
- alma-upgrade-kernel-rt-devel
- alma-upgrade-kernel-rt-modules
- alma-upgrade-kernel-rt-modules-core
- alma-upgrade-kernel-rt-modules-extra
- alma-upgrade-kernel-tools
- alma-upgrade-kernel-tools-libs
- alma-upgrade-kernel-tools-libs-devel
- alma-upgrade-kernel-uki-virt
- alma-upgrade-kernel-zfcpdump
- alma-upgrade-kernel-zfcpdump-core
- alma-upgrade-kernel-zfcpdump-devel
- alma-upgrade-kernel-zfcpdump-devel-matched
- alma-upgrade-kernel-zfcpdump-modules
- alma-upgrade-kernel-zfcpdump-modules-core
- alma-upgrade-kernel-zfcpdump-modules-extra
- alma-upgrade-libperf
- alma-upgrade-perf
- alma-upgrade-python3-perf
- alma-upgrade-rtla
- alma-upgrade-rv
- Lightweight Endpoint Agent
- Live Dashboards
- Real Risk Prioritization
- IT-Integrated Remediation Projects
- Cloud, Virtual, and Container Assessment
- Integrated Threat Feeds
- Easy-to-Use RESTful API
- Automation-Assisted Patching
- Automated Containment
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