GHSA-VW7W-8MP5-CR53
Vulnerability from github – Published: 2026-10-09 09:31 – Updated: 2026-10-09 09:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-98382"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-09T08:16:56Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject dev-bound-only programs on other devices\n\n__bpf_offload_dev_match() falls back to comparing offdev pointers after an\nexact netdev mismatch. Bound-only programs normally have NULL offdevs, so\nunrelated netdevs compare equal. A bound-only program on an\noffload-registered netdev can instead inherit a real offdev and match a\nsibling port. With CAP_BPF and CAP_NET_ADMIN, a caller can use\nbpf(BPF_LINK_CREATE) with a different target ifindex to run metadata kfuncs\nspecialized for the bound driver on the target driver\u0027s xdp_buff. Running a\nveth-bound program on tun reads beyond tun\u0027s bare stack xdp_buff as a\nveth_xdp_buff.\n\n Oops: general protection fault, probably for non-canonical address\n KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\n RIP: 0010:veth_xdp_rx_timestamp (drivers/net/veth.c:1673)\n Call Trace:\n ...\n tun_build_skb (drivers/net/tun.c:1739)\n tun_get_user (drivers/net/tun.c:1856)\n tun_chr_write_iter (drivers/net/tun.c:2091)\n vfs_write (fs/read_write.c:595 fs/read_write.c:687)\n ksys_write (fs/read_write.c:739)\n do_syscall_64 (arch/x86/entry/syscall_64.c:84)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n Kernel panic - not syncing: Fatal exception in interrupt\n\nRestrict non-offloaded programs to exact netdev matches and retain the\nshared-offdev fallback only for genuinely offloaded multi-port programs.",
"id": "GHSA-vw7w-8mp5-cr53",
"modified": "2026-10-09T09:31:05Z",
"published": "2026-10-09T09:31:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98382"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0dceda331180617aeeb22381e8480b37f18ba08b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6db1ce73e9853f533eb7f413f14ba00f8ec6f80d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/940b626854de200e6187777d42114727daca617c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bb375f3c5990e29851894f20ebc4b9dbc6676126"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e57f04194361574493e3e6cf0b9e9c69e4ae9791"
}
],
"schema_version": "1.4.0",
"severity": []
}
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