CVE-2026-43025— netfilter: ctnetlink: ignore explicit helper on new expectations
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-43025
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
netfilter: ctnetlink: ignore explicit helper on new expectations
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: ctnetlink: ignore explicit helper on new expectations Use the existing master conntrack helper, anything else is not really supported and it just makes validation more complicated, so just ignore what helper userspace suggests for this expectation. This was uncovered when validating CTA_EXPECT_CLASS via different helper provided by userspace than the existing master conntrack helper: BUG: KASAN: slab-out-of-bounds in nf_ct_expect_related_report+0x2479/0x27c0 Read of size 4 at addr ffff8880043fe408 by task poc/102 Call Trace: nf_ct_expect_related_report+0x2479/0x27c0 ctnetlink_create_expect+0x22b/0x3b0 ctnetlink_new_expect+0x4bd/0x5c0 nfnetlink_rcv_msg+0x67a/0x950 netlink_rcv_skb+0x120/0x350 Allowing to read kernel memory bytes off the expectation boundary. CTA_EXPECT_HELP_NAME is still used to offer the helper name to userspace via netlink dump.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
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netfilter ctnetlink中未忽略新期望的显式助手，可能导致越界读取。
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
II. Public POCs for CVE-2026-43025
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-43025
请登录查看更多情报信息。
Same Patch Batch · Linux · 2026-05-01 · 146 CVEs total
| CVE-2026-43011 | 9.8 CRITICAL | net/x25: Fix potential double free of skb |
| CVE-2026-43037 | 9.8 CRITICAL | ip6_tunnel: clear skb2->cb[] in ip4ip6_err() |
| CVE-2026-31705 | 9.8 CRITICAL | ksmbd: fix out-of-bounds write in smb2_get_ea() EA alignment |
| CVE-2026-43038 | 9.8 CRITICAL | ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() |
| CVE-2026-43039 | 9.8 CRITICAL | net: ti: icssg-prueth: fix missing data copy and wrong recycle in ZC RX dispatch |
| CVE-2026-31718 | 9.8 CRITICAL | ksmbd: fix use-after-free in __ksmbd_close_fd() via durable scavenger |
| CVE-2026-43018 | 8.8 HIGH | Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt |
| CVE-2026-31773 | 8.8 HIGH | Bluetooth: SMP: derive legacy responder STK authentication from MITM state |
| CVE-2026-31739 | 8.8 HIGH | crypto: tegra - Add missing CRYPTO_ALG_ASYNC |
| CVE-2026-31735 | 8.8 HIGH | iommupt: Fix short gather if the unmap goes into a large mapping |
| CVE-2026-31717 | 8.8 HIGH | ksmbd: validate owner of durable handle on reconnect |
| CVE-2026-43048 | 8.8 HIGH | HID: core: Mitigate potential OOB by removing bogus memset() |
| CVE-2026-31709 | 8.8 HIGH | smb: client: validate the whole DACL before rewriting it in cifsacl |
| CVE-2026-31706 | 8.8 HIGH | ksmbd: validate num_aces and harden ACE walk in smb_inherit_dacl() |
| CVE-2026-31712 | 8.3 HIGH | ksmbd: require minimum ACE size in smb_check_perm_dacl() |
| CVE-2026-31771 | 8.1 HIGH | Bluetooth: hci_event: move wake reason storage into validated event handlers |
| CVE-2026-31779 | 8.1 HIGH | wifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler() |
| CVE-2026-43051 | 8.1 HIGH | HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq |
| CVE-2026-31708 | 8.1 HIGH | smb: client: fix OOB read in smb2_ioctl_query_info QUERY_INFO path |
| CVE-2026-31695 | 7.8 HIGH | wifi: virt_wifi: remove SET_NETDEV_DEV to avoid use-after-free |
Showing top 20 of 146 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2026-43025
No comments yet