{"id":"CVE-2024-26863","summary":"hsr: Fix uninit-value access in hsr_get_node()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nhsr: Fix uninit-value access in hsr_get_node()\n\nKMSAN reported the following uninit-value access issue [1]:\n\n=====================================================\nBUG: KMSAN: uninit-value in hsr_get_node+0xa2e/0xa40 net/hsr/hsr_framereg.c:246\n hsr_get_node+0xa2e/0xa40 net/hsr/hsr_framereg.c:246\n fill_frame_info net/hsr/hsr_forward.c:577 [inline]\n hsr_forward_skb+0xe12/0x30e0 net/hsr/hsr_forward.c:615\n hsr_dev_xmit+0x1a1/0x270 net/hsr/hsr_device.c:223\n __netdev_start_xmit include/linux/netdevice.h:4940 [inline]\n netdev_start_xmit include/linux/netdevice.h:4954 [inline]\n xmit_one net/core/dev.c:3548 [inline]\n dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564\n __dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349\n dev_queue_xmit include/linux/netdevice.h:3134 [inline]\n packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276\n packet_snd net/packet/af_packet.c:3087 [inline]\n packet_sendmsg+0x8b1d/0x9f30 net/packet/af_packet.c:3119\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg net/socket.c:745 [inline]\n __sys_sendto+0x735/0xa10 net/socket.c:2191\n __do_sys_sendto net/socket.c:2203 [inline]\n __se_sys_sendto net/socket.c:2199 [inline]\n __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nUninit was created at:\n slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768\n slab_alloc_node mm/slub.c:3478 [inline]\n kmem_cache_alloc_node+0x5e9/0xb10 mm/slub.c:3523\n kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560\n __alloc_skb+0x318/0x740 net/core/skbuff.c:651\n alloc_skb include/linux/skbuff.h:1286 [inline]\n alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6334\n sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2787\n packet_alloc_skb net/packet/af_packet.c:2936 [inline]\n packet_snd net/packet/af_packet.c:3030 [inline]\n packet_sendmsg+0x70e8/0x9f30 net/packet/af_packet.c:3119\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg net/socket.c:745 [inline]\n __sys_sendto+0x735/0xa10 net/socket.c:2191\n __do_sys_sendto net/socket.c:2203 [inline]\n __se_sys_sendto net/socket.c:2199 [inline]\n __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nCPU: 1 PID: 5033 Comm: syz-executor334 Not tainted 6.7.0-syzkaller-00562-g9f8413c4a66f #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023\n=====================================================\n\nIf the packet type ID field in the Ethernet header is either ETH_P_PRP or\nETH_P_HSR, but it is not followed by an HSR tag, hsr_get_skb_sequence_nr()\nreads an invalid value as a sequence number. This causes the above issue.\n\nThis patch fixes the issue by returning NULL if the Ethernet header is not\nfollowed by an HSR tag.","modified":"2026-04-02T10:06:14.196489Z","published":"2024-04-17T10:27:26.252Z","related":["SUSE-SU-2024:2360-1","SUSE-SU-2024:2381-1","SUSE-SU-2024:2561-1","SUSE-SU-2024:2802-1","SUSE-SU-2024:2894-1","SUSE-SU-2024:2896-1","SUSE-SU-2024:2901-1","SUSE-SU-2024:2939-1","SUSE-SU-2024:2947-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26863.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/09e5cdbe2cc88c3c758927644a3eb02fac317209"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1ed222ca7396938eb1ab2d034f1ba0d8b00a7122"},{"type":"WEB","url":"https://git.kernel.org/stable/c/39cc316fb3bc5e7c9dc5eed314fe510d119c6862"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7fb2d4d6bb1c85f7a23aace0ed6c86a95dea792a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/889ed056eae7fda85b769a9ab33c093379c45428"},{"type":"WEB","url":"https://git.kernel.org/stable/c/97d2148ea435dff4b4e71817c9032eb321bcd37e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a809bbfd0e503351d3051317288a70a4569a4949"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ddbec99f58571301679addbc022256970ca3eac6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e3b2bfb8ff1810a537b2aa55ba906a6743ed120c"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26863.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26863"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f266a683a4804dc499efc6c2206ef68efed029d0"},{"fixed":"e3b2bfb8ff1810a537b2aa55ba906a6743ed120c"},{"fixed":"889ed056eae7fda85b769a9ab33c093379c45428"},{"fixed":"7fb2d4d6bb1c85f7a23aace0ed6c86a95dea792a"},{"fixed":"a809bbfd0e503351d3051317288a70a4569a4949"},{"fixed":"1ed222ca7396938eb1ab2d034f1ba0d8b00a7122"},{"fixed":"39cc316fb3bc5e7c9dc5eed314fe510d119c6862"},{"fixed":"97d2148ea435dff4b4e71817c9032eb321bcd37e"},{"fixed":"09e5cdbe2cc88c3c758927644a3eb02fac317209"},{"fixed":"ddbec99f58571301679addbc022256970ca3eac6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26863.json"}}],"schema_version":"1.7.5"}