cbcvebase.
CVE-2023-53365
published 2025-09-17

CVE-2023-53365: In the Linux kernel, the following vulnerability has been resolved: ip6mr: Fix skb_under_panic in ip6mr_cache_report() skbuff: skb_under_panic…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.18%
7.6th percentile
In the Linux kernel, the following vulnerability has been resolved: ip6mr: Fix skb_under_panic in ip6mr_cache_report() skbuff: skb_under_panic: text:ffffffff88771f69 len:56 put:-4 head:ffff88805f86a800 data:ffff887f5f86a850 tail:0x88 end:0x2c0 dev:pim6reg ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:192! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 2 PID: 22968 Comm: kworker/2:11 Not tainted 6.5.0-rc3-00044-g0a8db05b571a #236 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: ipv6_addrconf addrconf_dad_work RIP: 0010:skb_panic+0x152/0x1d0 Call Trace: skb_push+0xc4/0xe0 ip6mr_cache_report+0xd69/0x19b0 reg_vif_xmit+0x406/0x690 dev_hard_start_xmit+0x17e/0x6e0 __dev_queue_xmit+0x2d6a/0x3d20 vlan_dev_hard_start_xmit+0x3ab/0x5c0 dev_hard_start_xmit+0x17e/0x6e0 __dev_queue_xmit+0x2d6a/0x3d20 neigh_connected_output+0x3ed/0x570 ip6_finish_output2+0x5b5/0x1950 ip6_finish_output+0x693/0x11c0 ip6_output+0x24b/0x880 NF_HOOK.constprop.0+0xfd/0x530 ndisc_send_skb+0x9db/0x1400 ndisc_send_rs+0x12a/0x6c0 addrconf_dad_completed+0x3c9/0xea0 addrconf_dad_work+0x849/0x1420 process_one_work+0xa22/0x16e0 worker_thread+0x679/0x10c0 ret_from_fork+0x28/0x60 ret_from_fork_asm+0x11/0x20 When setup a vlan device on dev pim6reg, DAD ns packet may sent on reg_vif_xmit(). reg_vif_xmit() ip6mr_cache_report() skb_push(skb, -skb_network_offset(pkt));//skb_network_offset(pkt) is 4 And skb_push declared as: void *skb_push(struct sk_buff *skb, unsigned int len); skb->data -= len; //0xffff88805f86a84c - 0xfffffffc = 0xffff887f5f86a850 skb->data is set to 0xffff887f5f86a850, which is invalid mem addr, lead to skb_push() fails.

Affected

22 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.52-1 (bookworm)linux 6.1.52-1 (bookworm)
linuxlinux——
linuxlinux>= 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d < a96d74d1076c82a4cef02c150d9996b21354c78da96d74d1076c82a4cef02c150d9996b21354c78d
linuxlinux>= 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d < 8382e7ed2d63e6c2daf6881fa091526dc6c879cd8382e7ed2d63e6c2daf6881fa091526dc6c879cd
linuxlinux>= 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d < 0438e60a00d4e335b3c36397dbf26c74b5d13ef00438e60a00d4e335b3c36397dbf26c74b5d13ef0
linuxlinux>= 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d < 1683124129a4263dd5bce2475bab110e95fa03461683124129a4263dd5bce2475bab110e95fa0346
linuxlinux>= 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d < 1bb54a21f4d9b88442f8c3307c780e2db64417e41bb54a21f4d9b88442f8c3307c780e2db64417e4
linuxlinux>= 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d < 691a09eecad97e745b9aa0e3918db46d020bdacb691a09eecad97e745b9aa0e3918db46d020bdacb
linuxlinux>= 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d < 3326c711f18d18fe6e1f5d83d3a7eab07e5a15603326c711f18d18fe6e1f5d83d3a7eab07e5a1560
linuxlinux>= 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d < 30e0191b16e8a58e4620fa3e2839ddc7b9d4281c30e0191b16e8a58e4620fa3e2839ddc7b9d4281c
linuxlinux_kernel——
linuxlinux_kernel>= 0 < 5.10.191-15.10.191-1
linuxlinux_kernel>= 0 < 6.1.52-16.1.52-1
linuxlinux_kernel>= 0 < 6.4.11-16.4.11-1
linuxlinux_kernel>= 0 < 6.4.11-16.4.11-1
linuxlinux_kernel>= 2.6.26 < 4.14.3224.14.322
linuxlinux_kernel>= 4.15 < 4.19.2914.19.291
linuxlinux_kernel>= 4.20 < 5.4.2535.4.253
linuxlinux_kernel>= 5.11 < 5.15.1265.15.126
linuxlinux_kernel>= 5.16 < 6.1.456.1.45
linuxlinux_kernel>= 5.5 < 5.10.1905.10.190
linuxlinux_kernel>= 6.2 < 6.4.106.4.10

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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