CVE-2024-40959

CVE Details

Release Date:

2024-07-12

Description

In the Linux kernel, the following vulnerability has been resolved:\nxfrm6: check ip6_dst_idev() return value in xfrm6_get_saddr()\nip6_dst_idev() can return NULL, xfrm6_get_saddr() must act accordingly.\nsyzbot reported:\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 1 PID: 12 Comm: kworker/u8:1 Not tainted 6.10.0-rc2-syzkaller-00383-gb8481381d4e2 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024\nWorkqueue: wg-kex-wg1 wg_packet_handshake_send_worker\nRIP: 0010:xfrm6_get_saddr+0x93/0x130 net/ipv6/xfrm6_policy.c:64\nCode: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 97 00 00 00 4c 8b ab d8 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 86 00 00 00 4d 8b 6d 00 e8 ca 13 47 01 48 b8 00\nRSP: 0018:ffffc90000117378 EFLAGS: 00010246\nRAX: dffffc0000000000 RBX: ffff88807b079dc0 RCX: ffffffff89a0d6d7\nRDX: 0000000000000000 RSI: ffffffff89a0d6e9 RDI: ffff88807b079e98\nRBP: ffff88807ad73248 R08: 0000000000000007 R09: fffffffffffff000\nR10: ffff88807b079dc0 R11: 0000000000000007 R12: ffffc90000117480\nR13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\nFS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f4586d00440 CR3: 0000000079042000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\nxfrm_get_saddr net/xfrm/xfrm_policy.c:2452 [inline]\nxfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2481 [inline]\nxfrm_tmpl_resolve+0xa26/0xf10 net/xfrm/xfrm_policy.c:2541\nxfrm_resolve_and_create_bundle+0x140/0x2570 net/xfrm/xfrm_policy.c:2835\nxfrm_bundle_lookup net/xfrm/xfrm_policy.c:3070 [inline]\nxfrm_lookup_with_ifid+0x4d1/0x1e60 net/xfrm/xfrm_policy.c:3201\nxfrm_lookup net/xfrm/xfrm_policy.c:3298 [inline]\nxfrm_lookup_route+0x3b/0x200 net/xfrm/xfrm_policy.c:3309\nip6_dst_lookup_flow+0x15c/0x1d0 net/ipv6/ip6_output.c:1256\nsend6+0x611/0xd20 drivers/net/wireguard/socket.c:139\nwg_socket_send_skb_to_peer+0xf9/0x220 drivers/net/wireguard/socket.c:178\nwg_socket_send_buffer_to_peer+0x12b/0x190 drivers/net/wireguard/socket.c:200\nwg_packet_send_handshake_initiation+0x227/0x360 drivers/net/wireguard/send.c:40\nwg_packet_handshake_send_worker+0x1c/0x30 drivers/net/wireguard/send.c:51\nprocess_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231\nprocess_scheduled_works kernel/workqueue.c:3312 [inline]\nworker_thread+0x6c8/0xf70 kernel/workqueue.c:3393\nkthread+0x2c1/0x3a0 kernel/kthread.c:389\nret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147\nret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

See more information about CVE-2024-40959 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 7 (kernel-uek)	ELSA-2024-12610	2024-09-10
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12779	2024-10-11
Oracle Linux version 7 (kernel-uek-container)	ELSA-2024-12612	2024-09-11
Oracle Linux version 8 (kernel)	ELSA-2024-7000	2024-09-24
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12610	2024-09-10
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12618	2024-09-12
Oracle Linux version 8 (kernel-uek-container)	ELSA-2024-12612	2024-09-11
Oracle Linux version 9 (kernel)	ELSA-2024-8162	2024-10-16
Oracle Linux version 9 (kernel-uek)	ELSA-2024-12618	2024-09-12