cbcvebase.
CVE-2024-35973
published 2024-05-20

CVE-2024-35973: In the Linux kernel, the following vulnerability has been resolved: geneve: fix header validation in geneve[6]_xmit_skb syzbot is able to trigger an…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.25%
16.4th percentile
In the Linux kernel, the following vulnerability has been resolved: geneve: fix header validation in geneve[6]_xmit_skb syzbot is able to trigger an uninit-value in geneve_xmit() [1] Problem : While most ip tunnel helpers (like ip_tunnel_get_dsfield()) uses skb_protocol(skb, true), pskb_inet_may_pull() is only using skb->protocol. If anything else than ETH_P_IPV6 or ETH_P_IP is found in skb->protocol, pskb_inet_may_pull() does nothing at all. If a vlan tag was provided by the caller (af_packet in the syzbot case), the network header might not point to the correct location, and skb linear part could be smaller than expected. Add skb_vlan_inet_prepare() to perform a complete mac validation. Use this in geneve for the moment, I suspect we need to adopt this more broadly. v4 - Jakub reported v3 broke l2_tos_ttl_inherit.sh selftest - Only call __vlan_get_protocol() for vlan types. v2,v3 - Addressed Sabrina comments on v1 and v2 [1] BUG: KMSAN: uninit-value in geneve_xmit_skb drivers/net/geneve.c:910 [inline] BUG: KMSAN: uninit-value in geneve_xmit+0x302d/0x5420 drivers/net/geneve.c:1030 geneve_xmit_skb drivers/net/geneve.c:910 [inline] geneve_xmit+0x302d/0x5420 drivers/net/geneve.c:1030 __netdev_start_xmit include/linux/netdevice.h:4903 [inline] netdev_start_xmit include/linux/netdevice.h:4917 [inline] xmit_one net/core/dev.c:3531 [inline] dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3547 __dev_queue_xmit+0x348d/0x52c0 net/core/dev.c:4335 dev_queue_xmit include/linux/netdevice.h:3091 [inline] packet_xmit+0x9c/0x6c0 net/packet/af_packet.c:276 packet_snd net/packet/af_packet.c:3081 [inline] packet_sendmsg+0x8bb0/0x9ef0 net/packet/af_packet.c:3113 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:745 __sys_sendto+0x685/0x830 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0x125/0x1d0 net/socket.c:2199 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwfram

Affected

35 ranges· showing 25
VendorProductVersion rangeFixed in
debiandebian_linux
debianlinux< linux 6.1.90-1 (bookworm)linux 6.1.90-1 (bookworm)
linuxlinux
linuxlinux
linuxlinux
linuxlinux>= 35385daa8db320d2d9664930c28e732578b0d7de < 43be590456e1f3566054ce78ae2dbb68cbe1a53643be590456e1f3566054ce78ae2dbb68cbe1a536
linuxlinux>= 4.19.191 < 4.19.3134.19.313
linuxlinux>= 5.10.37 < 5.10.2165.10.216
linuxlinux>= 5.11.21 < 5.125.12
linuxlinux>= 5.12.4 < 5.135.13
linuxlinux>= 5.4.119 < 5.4.2755.4.275
linuxlinux>= 6f92124d74419797fadfbcd5b7a72c384a6413ad < d3adf11d7993518a39bd02b383cfe657ccc0023cd3adf11d7993518a39bd02b383cfe657ccc0023c
linuxlinux>= 71ad9260c001b217d704cda88ecea251b2d367da < 10204df9beda4978bd1d0c2db0d8375bfb03b91510204df9beda4978bd1d0c2db0d8375bfb03b915
linuxlinux>= d13f048dd40e8577260cd43faea8ec9b77520197 < 3c1ae6de74e3d2d6333d29a2d3e13e6094596c793c1ae6de74e3d2d6333d29a2d3e13e6094596c79
linuxlinux>= d13f048dd40e8577260cd43faea8ec9b77520197 < 4a1b65d1e55d53b397cb27014208be1e041726704a1b65d1e55d53b397cb27014208be1e04172670
linuxlinux>= d13f048dd40e8577260cd43faea8ec9b77520197 < 190d9efa5773f26d6f334b1b8be282c4fa13fd5e190d9efa5773f26d6f334b1b8be282c4fa13fd5e
linuxlinux>= d13f048dd40e8577260cd43faea8ec9b77520197 < 357163fff3a6e48fe74745425a32071ec9caf852357163fff3a6e48fe74745425a32071ec9caf852
linuxlinux>= d13f048dd40e8577260cd43faea8ec9b77520197 < d8a6213d70accb403b82924a1c229e733433a5efd8a6213d70accb403b82924a1c229e733433a5ef
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.216-15.10.216-1
linuxlinux_kernel>= 0 < 6.1.90-16.1.90-1
linuxlinux_kernel>= 0 < 6.8.9-16.8.9-1
linuxlinux_kernel>= 0 < 6.8.9-16.8.9-1
linuxlinux_kernel>= 0 < 5.4.0-189.2095.4.0-189.209
linuxlinux_kernel>= 0 < 5.15.0-116.1265.15.0-116.126

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.1HIGH
vendor_ubuntu7.1HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.