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CVE-2026-80646— ipv6: guard against possible NULL deref in __in6_dev_stats_get()

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IPv6的__in6_dev_stats_get()函数中，dev_get_by_index_rcu()在原始物理设备注销时可能返回NULL，可能导致空指针取消引用。

CVSS 7.5 · High EPSS 0.72% · P53

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f< a23f2c68c6635e41404f189f8f7ae910738cebdb affected
e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f< e14db43677946bf2095febd294bb3c13ab375ab7 affected
e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f< 1a4adfbeb47a212a64539137411f1ca168474d33 affected
e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f< 1e3db30a88815bae6e9d5db6f64ac735e615a07e affected
e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f< 952426a83ca75cea25c09d58944abafaa3ebd242 affected
e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f< 0db1949084e85a72d174a7dea3259b94fe5a9305 affected
e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f< fc920c0659cdea5afd8721c1155a51564859e075 affected
e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f< 507541c2a8eeb76c02bd2511958f73a8cfa3e1bc affected
… +12 more rows
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I. Basic Information for CVE-2026-80646

Vulnerability Information
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Vulnerability Title
ipv6: guard against possible NULL deref in __in6_dev_stats_get()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: guard against possible NULL deref in __in6_dev_stats_get() dev_get_by_index_rcu() could return NULL if the original physical device is unregistered. Found by Sashiko.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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
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IPv6的__in6_dev_stats_get()函数中，dev_get_by_index_rcu()在原始物理设备注销时可能返回NULL，可能导致空指针取消引用。
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 e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f ~ a23f2c68c6635e41404f189f8f7ae910738cebdb -
Linux Linux 5.2 -

II. Public POCs for CVE-2026-80646

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III. Intelligence Information for CVE-2026-80646

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Patches & Fixes for CVE-2026-80646 (8)

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-2026-80646

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