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:
<TASK>
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.
References
Configurations
Configuration 1 (hide)
|
History
12 Dec 2025, 16:24
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux
Linux linux Kernel |
|
| CPE | cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:* |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/0438e60a00d4e335b3c36397dbf26c74b5d13ef0 - Patch | |
| References | () https://git.kernel.org/stable/c/1683124129a4263dd5bce2475bab110e95fa0346 - Patch | |
| References | () https://git.kernel.org/stable/c/1bb54a21f4d9b88442f8c3307c780e2db64417e4 - Patch | |
| References | () https://git.kernel.org/stable/c/30e0191b16e8a58e4620fa3e2839ddc7b9d4281c - Patch | |
| References | () https://git.kernel.org/stable/c/3326c711f18d18fe6e1f5d83d3a7eab07e5a1560 - Patch | |
| References | () https://git.kernel.org/stable/c/691a09eecad97e745b9aa0e3918db46d020bdacb - Patch | |
| References | () https://git.kernel.org/stable/c/8382e7ed2d63e6c2daf6881fa091526dc6c879cd - Patch | |
| References | () https://git.kernel.org/stable/c/a96d74d1076c82a4cef02c150d9996b21354c78d - Patch | |
| CWE | NVD-CWE-noinfo |
17 Sep 2025, 15:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-09-17 15:15
Updated : 2025-12-12 16:24
NVD link : CVE-2023-53365
Mitre link : CVE-2023-53365
CVE.ORG link : CVE-2023-53365
JSON object : View
Products Affected
linux
- linux_kernel
CWE