{"cve":"CVE-2023-53365","nvd":{"published":"2025-09-17T15:15:40.803","modified":"2026-06-17T06:45:01.113","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nip6mr: Fix skb_under_panic in ip6mr_cache_report()\n\nskbuff: skb_under_panic: text:ffffffff88771f69 len:56 put:-4\n head:ffff88805f86a800 data:ffff887f5f86a850 tail:0x88 end:0x2c0 dev:pim6reg\n ------------[ cut here ]------------\n kernel BUG at net/core/skbuff.c:192!\n invalid opcode: 0000 [#1] PREEMPT SMP KASAN\n CPU: 2 PID: 22968 Comm: kworker/2:11 Not tainted 6.5.0-rc3-00044-g0a8db05b571a #236\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\n Workqueue: ipv6_addrconf addrconf_dad_work\n RIP: 0010:skb_panic+0x152/0x1d0\n Call Trace:\n  <TASK>\n  skb_push+0xc4/0xe0\n  ip6mr_cache_report+0xd69/0x19b0\n  reg_vif_xmit+0x406/0x690\n  dev_hard_start_xmit+0x17e/0x6e0\n  __dev_queue_xmit+0x2d6a/0x3d20\n  vlan_dev_hard_start_xmit+0x3ab/0x5c0\n  dev_hard_start_xmit+0x17e/0x6e0\n  __dev_queue_xmit+0x2d6a/0x3d20\n  neigh_connected_output+0x3ed/0x570\n  ip6_finish_output2+0x5b5/0x1950\n  ip6_finish_output+0x693/0x11c0\n  ip6_output+0x24b/0x880\n  NF_HOOK.constprop.0+0xfd/0x530\n  ndisc_send_skb+0x9db/0x1400\n  ndisc_send_rs+0x12a/0x6c0\n  addrconf_dad_completed+0x3c9/0xea0\n  addrconf_dad_work+0x849/0x1420\n  process_one_work+0xa22/0x16e0\n  worker_thread+0x679/0x10c0\n  ret_from_fork+0x28/0x60\n  ret_from_fork_asm+0x11/0x20\n\nWhen setup a vlan device on dev pim6reg, DAD ns packet may sent on reg_vif_xmit().\nreg_vif_xmit()\n    ip6mr_cache_report()\n        skb_push(skb, -skb_network_offset(pkt));//skb_network_offset(pkt) is 4\nAnd skb_push declared as:\n\tvoid *skb_push(struct sk_buff *skb, unsigned int len);\n\t\tskb->data -= len;\n\t\t//0xffff88805f86a84c - 0xfffffffc = 0xffff887f5f86a850\nskb->data is set to 0xffff887f5f86a850, which is invalid mem addr, lead to skb_push() fails.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/0438e60a00d4e335b3c36397dbf26c74b5d13ef0","https://git.kernel.org/stable/c/1683124129a4263dd5bce2475bab110e95fa0346","https://git.kernel.org/stable/c/1bb54a21f4d9b88442f8c3307c780e2db64417e4","https://git.kernel.org/stable/c/30e0191b16e8a58e4620fa3e2839ddc7b9d4281c","https://git.kernel.org/stable/c/3326c711f18d18fe6e1f5d83d3a7eab07e5a1560"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:10:08.713834912+00:00"},"epss":{"cve":"CVE-2023-53365","score":0.00194,"percentile":0.09144,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}