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CVE-2023-53192— vxlan: Fix nexthop hash size

Quick assessment

Affected

Linux Linux

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于vxlan模块未正确处理nexthop哈希大小，可能导致边界外访问或路径选择不当。

CVSS 9.8 · Critical EPSS 0.39% · P32 Updated Aug 05, 2026

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 12

Vendor	Product	Version Range	Status
Linux	Linux	`1274e1cc42264d4e629841e4f182795cb0becfd2< c650597647ecb318d02372277bdfd866c6829f78`	affected
		`1274e1cc42264d4e629841e4f182795cb0becfd2< 32ef2c0c6cf11a076f0280a7866b9abc47821e19`	affected
		`1274e1cc42264d4e629841e4f182795cb0becfd2< 7b8717658dff8b471cbfc124bf9b5ca4229579ed`	affected
		`1274e1cc42264d4e629841e4f182795cb0becfd2< 23c195ce6f4aec86e1c9e1ea1c800381c4b465c7`	affected
		`1274e1cc42264d4e629841e4f182795cb0becfd2< 0756384fb1bd38adb2ebcfd1307422f433a1d772`	affected
		`5.8`	affected
		`< 5.8`	unaffected
		`5.10.190≤ 5.10.*`	unaffected
… +4 more rows

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I. Basic Information for CVE-2023-53192

Vulnerability Information

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Vulnerability Title

vxlan: Fix nexthop hash size

Source: CVE Program / CVE List V5

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix nexthop hash size The nexthop code expects a 31 bit hash, such as what is returned by fib_multipath_hash() and rt6_multipath_hash(). Passing the 32 bit hash returned by skb_get_hash() can lead to problems related to the fact that 'int hash' is a negative number when the MSB is set. In the case of hash threshold nexthop groups, nexthop_select_path_hthr() will disproportionately select the first nexthop group entry. In the case of resilient nexthop groups, nexthop_select_path_res() may do an out of bounds access in nh_buckets[], for example: hash = -912054133 num_nh_buckets = 2 bucket_index = 65535 which leads to the following panic: BUG: unable to handle page fault for address: ffffc900025910c8 PGD 100000067 P4D 100000067 PUD 10026b067 PMD 0 Oops: 0002 [#1] PREEMPT SMP KASAN NOPTI CPU: 4 PID: 856 Comm: kworker/4:3 Not tainted 6.5.0-rc2+ #34 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: ipv6_addrconf addrconf_dad_work RIP: 0010:nexthop_select_path+0x197/0xbf0 Code: c1 e4 05 be 08 00 00 00 4c 8b 35 a4 14 7e 01 4e 8d 6c 25 00 4a 8d 7c 25 08 48 01 dd e8 c2 25 15 ff 49 8d 7d 08 e8 39 13 15 ff <4d> 89 75 08 48 89 ef e8 7d 12 15 ff 48 8b 5d 00 e8 14 55 2f 00 85 RSP: 0018:ffff88810c36f260 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000002000c0 RCX: ffffffffaf02dd77 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffc900025910c8 RBP: ffffc900025910c0 R08: 0000000000000001 R09: fffff520004b2219 R10: ffffc900025910cf R11: 31392d2068736168 R12: 00000000002000c0 R13: ffffc900025910c0 R14: 00000000fffef608 R15: ffff88811840e900 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc900025910c8 CR3: 0000000129d00000 CR4: 0000000000750ee0 PKRU: 55555554 Call Trace: <TASK> ? __die+0x23/0x70 ? page_fault_oops+0x1ee/0x5c0 ? __pfx_is_prefetch.constprop.0+0x10/0x10 ? __pfx_page_fault_oops+0x10/0x10 ? search_bpf_extables+0xfe/0x1c0 ? fixup_exception+0x3b/0x470 ? exc_page_fault+0xf6/0x110 ? asm_exc_page_fault+0x26/0x30 ? nexthop_select_path+0x197/0xbf0 ? nexthop_select_path+0x197/0xbf0 ? lock_is_held_type+0xe7/0x140 vxlan_xmit+0x5b2/0x2340 ? __lock_acquire+0x92b/0x3370 ? __pfx_vxlan_xmit+0x10/0x10 ? __pfx___lock_acquire+0x10/0x10 ? __pfx_register_lock_class+0x10/0x10 ? skb_network_protocol+0xce/0x2d0 ? dev_hard_start_xmit+0xca/0x350 ? __pfx_vxlan_xmit+0x10/0x10 dev_hard_start_xmit+0xca/0x350 __dev_queue_xmit+0x513/0x1e20 ? __pfx___dev_queue_xmit+0x10/0x10 ? __pfx_lock_release+0x10/0x10 ? mark_held_locks+0x44/0x90 ? skb_push+0x4c/0x80 ? eth_header+0x81/0xe0 ? __pfx_eth_header+0x10/0x10 ? neigh_resolve_output+0x215/0x310 ? ip6_finish_output2+0x2ba/0xc90 ip6_finish_output2+0x2ba/0xc90 ? lock_release+0x236/0x3e0 ? ip6_mtu+0xbb/0x240 ? __pfx_ip6_finish_output2+0x10/0x10 ? find_held_lock+0x83/0xa0 ? lock_is_held_type+0xe7/0x140 ip6_finish_output+0x1ee/0x780 ip6_output+0x138/0x460 ? __pfx_ip6_output+0x10/0x10 ? __pfx___lock_acquire+0x10/0x10 ? __pfx_ip6_finish_output+0x10/0x10 NF_HOOK.constprop.0+0xc0/0x420 ? __pfx_NF_HOOK.constprop.0+0x10/0x10 ? ndisc_send_skb+0x2c0/0x960 ? __pfx_lock_release+0x10/0x10 ? __local_bh_enable_ip+0x93/0x110 ? lock_is_held_type+0xe7/0x140 ndisc_send_skb+0x4be/0x960 ? __pfx_ndisc_send_skb+0x10/0x10 ? mark_held_locks+0x65/0x90 ? find_held_lock+0x83/0xa0 ndisc_send_ns+0xb0/0x110 ? __pfx_ndisc_send_ns+0x10/0x10 addrconf_dad_work+0x631/0x8e0 ? lock_acquire+0x180/0x3f0 ? __pfx_addrconf_dad_work+0x10/0x10 ? mark_held_locks+0x24/0x90 process_one_work+0x582/0x9c0 ? __pfx_process_one_work+0x10/0x10 ? __pfx_do_raw_spin_lock+0x10/0x10 ? mark_held_locks+0x24/0x90 worker_thread+0x93/0x630 ? __kthread_parkme+0xdc/0x100 ? __pfx_worker_thread+0x10/0x10 kthread+0x1a5/0x1e0 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x34/0x60 ---truncated---

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Vulnerability Title

Linux kernel 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Linux	Linux	1274e1cc42264d4e629841e4f182795cb0becfd2 ~ c650597647ecb318d02372277bdfd866c6829f78	-
Linux	Linux	5.8	-

II. Public POCs for CVE-2023-53192

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2023-53192

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https://www.cve.org/CVERecord?id=CVE-2023-53192

Same Patch Batch · Linux · 2025-09-15 · 210 CVEs total

CVE-2022-50235	9.8 CRITICAL	NFSD: Protect against send buffer overflow in NFSv2 READDIR
CVE-2022-50335	9.8 CRITICAL	9p: set req refcount to zero to avoid uninitialized usage
CVE-2023-53253	8.8 HIGH	HID: nvidia-shield: Reference hid_device devm allocation of input_dev name
CVE-2023-53226	8.8 HIGH	wifi: mwifiex: Fix OOB and integer underflow when rx packets
CVE-2022-50241	8.8 HIGH	NFSD: fix use-after-free on source server when doing inter-server copy
CVE-2023-53194	8.4 HIGH	fs/ntfs3: Add length check in indx_get_root
CVE-2023-53213	8.1 HIGH	wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies()
CVE-2023-53186	8.1 HIGH	skbuff: Fix a race between coalescing and releasing SKBs
CVE-2022-50303	7.8 HIGH	drm/amdkfd: Fix double release compute pasid
CVE-2023-53254	7.8 HIGH	cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
CVE-2023-53252	7.8 HIGH	Bluetooth: use RCU for hci_conn_params and iterate safely in hci_sync
CVE-2023-53170	7.8 HIGH	net: dsa: Removed unneeded of_node_put in felix_parse_ports_node
CVE-2023-53176	7.8 HIGH	serial: 8250: Reinit port->pm on port specific driver unbind
CVE-2023-53178	7.8 HIGH	mm: fix zswap writeback race condition
CVE-2023-53179	7.8 HIGH	netfilter: ipset: add the missing IP_SET_HASH_WITH_NET0 macro for ip_set_hash_netportnet.c
CVE-2023-53184	7.8 HIGH	arm64/sme: Set new vector length before reallocating
CVE-2022-50315	7.8 HIGH	ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS
CVE-2023-53187	7.8 HIGH	btrfs: fix use-after-free of new block group that became unused
CVE-2025-39800	7.8 HIGH	btrfs: abort transaction on unexpected eb generation at btrfs_copy_root()
CVE-2022-50286	7.8 HIGH	ext4: fix delayed allocation bug in ext4_clu_mapped for bigalloc + inline

Showing top 20 of 210 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux

Same vendor: Linux

V. Comments for CVE-2023-53192

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2023-53192— vxlan: Fix nexthop hash size

Quick assessment

Possible ATT&CK Techniques 1 AI

Affected Version Matrix 12

I. Basic Information for CVE-2023-53192

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2023-53192

III. Intelligence Information for CVE-2023-53192

Same Patch Batch · Linux · 2025-09-15 · 210 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2023-53192

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