CVE-2026-98382— bpf: Reject dev-bound-only programs on other devices
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.
在 Linux 内核中，已修复以下漏洞： bpf：在其他设备上拒绝仅绑定到特定设备（dev-bound-only）的 BPF 程序 在精确的网络设备（netdev）不匹配后，会回退到比较 offload 设备（offdev）指针。仅绑定程序（bound-only programs）通常具有 NULL 的 offdev 指针，因此不相关的网络设备会被错误地视为相等。如果某个仅绑定程序绑定到一个已注册 offload 的网络设备，它可能会继承一个真实的 offload 设备（offdev），从而错误地匹配到同源端口（s
Possible ATT&CK Techniques 2 AI
T1068 · Exploitation for Privilege Escalation T1055 · Process Injection
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I. Basic Information for CVE-2026-98382
Vulnerability Information
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Vulnerability Title
bpf: Reject dev-bound-only programs on other devices
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
bpf: Reject dev-bound-only programs on other devices
__bpf_offload_dev_match() falls back to comparing offdev pointers after an
exact netdev mismatch. Bound-only programs normally have NULL offdevs, so
unrelated netdevs compare equal. A bound-only program on an
offload-registered netdev can instead inherit a real offdev and match a
sibling port. With CAP_BPF and CAP_NET_ADMIN, a caller can use
bpf(BPF_LINK_CREATE) with a different target ifindex to run metadata kfuncs
specialized for the bound driver on the target driver's xdp_buff. Running a
veth-bound program on tun reads beyond tun's bare stack xdp_buff as a
veth_xdp_buff.
Oops: general protection fault, probably for non-canonical address
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
RIP: 0010:veth_xdp_rx_timestamp (drivers/net/veth.c:1673)
Call Trace:
...
tun_build_skb (drivers/net/tun.c:1739)
tun_get_user (drivers/net/tun.c:1856)
tun_chr_write_iter (drivers/net/tun.c:2091)
vfs_write (fs/read_write.c:595 fs/read_write.c:687)
ksys_write (fs/read_write.c:739)
do_syscall_64 (arch/x86/entry/syscall_64.c:84)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
Kernel panic - not syncing: Fatal exception in interrupt
Restrict non-offloaded programs to exact netdev matches and retain the
shared-offdev fallback only for genuinely offloaded multi-port programs.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-98382
| # | POC Description | Source Link | Shenlong Link |
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Patches & Fixes for CVE-2026-98382 (5)
Same Patch Batch · Linux · 2026-10-09 · 10 CVEs total
| CVE-2026-98384 | bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destroy() | |
| CVE-2026-98383 | bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL | |
| CVE-2026-98381 | veth: manage XDP program pointers during channel resize | |
| CVE-2026-98380 | net/sched: reject IDR error pointers when deleting actions | |
| CVE-2026-98378 | bpf: Skip unsettled links in link iterator | |
| CVE-2026-98379 | netfilter: ip6t_rpfilter: reject routes without inet6_dev | |
| CVE-2026-98377 | vlan: require the MAC header to be present in __vlan_insert_inner_tag() | |
| CVE-2026-98376 | bpf: Use array_map_meta_equal for percpu array inner map replacement | |
| CVE-2026-98375 | xen/netfront: drop RX packets with a short Ethernet header |
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions -
CVE-2026-98378
bpf: Skip unsettled links in link iterator
Same vendor: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions -
CVE-2026-98378
bpf: Skip unsettled links in link iterator
V. Comments for CVE-2026-98382
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