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CVE-2026-80669— bpf: Disable xfrm_decode_session hook attachment

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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于BPF LSM程序可附加到xfrm_decode_session()钩子，该钩子返回错误时会导致security_skb_classify_flow()触发BUG_ON，造成内核崩溃。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.21% · P11

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 9e4e01dfd3254c7f04f24b7c6b29596bc12332f3< aa265d47308775c5501073b08133623bcb5421f9 affected
9e4e01dfd3254c7f04f24b7c6b29596bc12332f3< 6b44c6660aa1c9b843e450a623ac4a8484919dce affected
9e4e01dfd3254c7f04f24b7c6b29596bc12332f3< 4ae780d173ef40d4f7cb76935dc2d55fbf380009 affected
9e4e01dfd3254c7f04f24b7c6b29596bc12332f3< 49fa1be621dde8f526d36e5791aded8fafda1e9c affected
9e4e01dfd3254c7f04f24b7c6b29596bc12332f3< 1bb3b6a5c3c5cc814eae4ff0212fdced36f8bce9 affected
9e4e01dfd3254c7f04f24b7c6b29596bc12332f3< 12091470c6b4c1c14b2de12dcbae2ada6cb6d20b affected
5.7 affected
< 5.7 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-80669

Vulnerability Information
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Vulnerability Title
bpf: Disable xfrm_decode_session hook attachment
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Disable xfrm_decode_session hook attachment BPF LSM programs can currently attach to xfrm_decode_session(). That hook may return an error, but security_skb_classify_flow() calls it from a void path and triggers BUG_ON() if an error is returned. Disable BPF attachment to the hook to prevent a BPF LSM program from turning packet classification into a full panic.
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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于BPF LSM程序可附加到xfrm_decode_session()钩子，该钩子返回错误时会导致security_skb_classify_flow()触发BUG_ON，造成内核崩溃。
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 9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 ~ aa265d47308775c5501073b08133623bcb5421f9 -
Linux Linux 5.7 -

II. Public POCs for CVE-2026-80669

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III. Intelligence Information for CVE-2026-80669

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Patches & Fixes for CVE-2026-80669 (6)

Same Patch Batch · Linux · 2026-08-28 · 135 CVEs total

CVE-2026-80634 9.8 CRITICAL netfilter: flowtable: avoid num_encaps underflow on bridge VLAN untag
CVE-2026-80694 9.8 CRITICAL net: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller
CVE-2026-80681 9.8 CRITICAL vxlan: re-fetch eth header after route_shortcircuit()
CVE-2026-80674 9.8 CRITICAL ntfs: validate resident attribute lists and harden the validator
CVE-2026-80673 9.8 CRITICAL ntfs: bound the look-ahead attribute-list entry in ntfs_external_attr_find()
CVE-2026-80668 9.8 CRITICAL netfilter: nf_conntrack_expect: use conntrack GC to reap expectations
CVE-2026-80630 9.8 CRITICAL net/sched: sch_fq_codel: Do not call qdisc_tree_reduce_backlog during peek before restorin
CVE-2026-80617 9.8 CRITICAL net: airoha: fix foe_check_time allocation size
CVE-2026-80612 9.8 CRITICAL net: lwtunnel: Drop skb metadata before LWT encapsulation
CVE-2026-80714 9.8 CRITICAL ipvs: do not propagate one-packet flag to synced conns
CVE-2026-80609 9.8 CRITICAL qede: fix out-of-bounds check for cqe->len_list[]
CVE-2026-80600 9.8 CRITICAL batman-adv: dat: acquire ARP hw source only after skb realloc
CVE-2026-80693 9.3 CRITICAL idpf: bound interrupt-vector register fill to the allocated array
CVE-2026-80684 9.3 CRITICAL KVM: s390: pci: Fix NULL dereference on AIBV allocation failure
CVE-2026-80671 9.3 CRITICAL perf sched: Fix register_pid() overflow, strcpy, and BUG_ON
CVE-2026-80603 9.1 CRITICAL netfilter: nf_conntrack_irc: fix parse_dcc() off-by-one OOB read
CVE-2026-80670 9.1 CRITICAL perf tools: Use perf_env__get_cpu_topology() in machine__resolve()
CVE-2026-80721 8.8 HIGH Bluetooth: ISO: ensure no dangling hcon references in iso_conn
CVE-2026-80722 8.8 HIGH wifi: mac80211: validate individual TWT params before driver setup
CVE-2026-80724 8.8 HIGH ptp: vmclock: prevent read-only mappings from becoming writable

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80669

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