CVE-2024-26863

CVE Details

Release Date:

2024-04-17

Description

In the Linux kernel, the following vulnerability has been resolved:\nhsr: Fix uninit-value access in hsr_get_node()\nKMSAN reported the following uninit-value access issue [1]:\n=====================================================\nBUG: KMSAN: uninit-value in hsr_get_node+0xa2e/0xa40 net/hsr/hsr_framereg.c:246\nhsr_get_node+0xa2e/0xa40 net/hsr/hsr_framereg.c:246\nfill_frame_info net/hsr/hsr_forward.c:577 [inline]\nhsr_forward_skb+0xe12/0x30e0 net/hsr/hsr_forward.c:615\nhsr_dev_xmit+0x1a1/0x270 net/hsr/hsr_device.c:223\n__netdev_start_xmit include/linux/netdevice.h:4940 [inline]\nnetdev_start_xmit include/linux/netdevice.h:4954 [inline]\nxmit_one net/core/dev.c:3548 [inline]\ndev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564\n__dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349\ndev_queue_xmit include/linux/netdevice.h:3134 [inline]\npacket_xmit+0x9c/0x6b0 net/packet/af_packet.c:276\npacket_snd net/packet/af_packet.c:3087 [inline]\npacket_sendmsg+0x8b1d/0x9f30 net/packet/af_packet.c:3119\nsock_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\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\ndo_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\nUninit was created at:\nslab_post_alloc_hook+0x129/0xa70 mm/slab.h:768\nslab_alloc_node mm/slub.c:3478 [inline]\nkmem_cache_alloc_node+0x5e9/0xb10 mm/slub.c:3523\nkmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560\n__alloc_skb+0x318/0x740 net/core/skbuff.c:651\nalloc_skb include/linux/skbuff.h:1286 [inline]\nalloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6334\nsock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2787\npacket_alloc_skb net/packet/af_packet.c:2936 [inline]\npacket_snd net/packet/af_packet.c:3030 [inline]\npacket_sendmsg+0x70e8/0x9f30 net/packet/af_packet.c:3119\nsock_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\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\ndo_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\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=====================================================\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.\nThis patch fixes the issue by returning NULL if the Ethernet header is not\nfollowed by an HSR tag.

See more information about CVE-2024-26863 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	5.5	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 9 (kernel)	ELSA-2024-9315	2024-11-14