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CVE-2026-97419— hsr: broadcast netlink notifications in the device's net namespace

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： hsr：在设备的网络命名空间内广播 netlink 通知 HSR 通用 netlink 族设置了 。HSR 设备可以存在于除 以外的网络命名空间中。 有两个异步通知器通过 广播事件： 和 。该辅助函数仅向 中的默认 genl socket 广播消息。因此，这些事件始终被发送到 。设备的网络命名空间对此没有影响。 这带来两个问题： 1. 位于设备自身网络命名空间中的监听器无法收到本设备的环错误（ring error）和节点关闭（node down）事件。 2. 中的特权监听器

AI Predicted 5.3 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux f421436a591d34fa5279b54a96ac07d70250cc8d< 9f13023607f1e95bd098cc49052b0c8955d334f9 affected
f421436a591d34fa5279b54a96ac07d70250cc8d< 798ccb12810a58a37264685b28ddf990ef49559c affected
f421436a591d34fa5279b54a96ac07d70250cc8d< 9bf45feee630be868ab54e3d0f3d430c07471f0e affected
f421436a591d34fa5279b54a96ac07d70250cc8d< 016b8eaca53bfd57e84ea28b5c9174c89d7679e1 affected
f421436a591d34fa5279b54a96ac07d70250cc8d< 25b69f281cebe051a8e4ab19950a939c27ead1bc affected
f421436a591d34fa5279b54a96ac07d70250cc8d< 24b3f1a9982c176d05a523a4bb9314dca0db4488 affected
f421436a591d34fa5279b54a96ac07d70250cc8d< a762fabd7ef9a6cc07258684138f9c3f078d0326 affected
3.13 affected
… +8 more rows
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I. Basic Information for CVE-2026-97419

Vulnerability Information
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Vulnerability Title
hsr: broadcast netlink notifications in the device's net namespace
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: hsr: broadcast netlink notifications in the device's net namespace The HSR generic netlink family sets .netnsok = true. HSR devices can live in network namespaces other than init_net. Two async notifiers broadcast events with genlmsg_multicast(). They are hsr_nl_ringerror() and hsr_nl_nodedown(). That helper delivers only on the default genl socket in init_net. So the events always land in init_net. The network namespace of the device does not matter. This has two effects. A listener in the device's own namespace never sees its own ring error and node down events. A privileged listener in init_net receives events from HSR devices in other namespaces. The payload carries the peer node MAC (HSR_A_NODE_ADDR) and the slave port ifindex (HSR_A_IFINDEX). Switch both callers to genlmsg_multicast_netns(). Other families with .netnsok = true already do this. Examples are gtp, ovpn, team, batman-adv, netdev-genl, ethtool and handshake. hsr_nl_ringerror() already has the slave port. It uses dev_net(port->dev). hsr_nl_nodedown() takes the namespace from the master port via hsr_port_get_hsr().
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux f421436a591d34fa5279b54a96ac07d70250cc8d ~ 9f13023607f1e95bd098cc49052b0c8955d334f9 -
Linux Linux 3.13 -

II. Public POCs for CVE-2026-97419

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III. Intelligence Information for CVE-2026-97419

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Patches & Fixes for CVE-2026-97419 (7)

Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total

CVE-2026-93207 9.8 CRITICAL SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry
CVE-2026-97413 9.8 CRITICAL RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
CVE-2026-93228 9.1 CRITICAL svcrdma: Reject Write/Reply chunks with segcount 0
CVE-2026-93799 8.8 HIGH wifi: iwlwifi: mvm: validate sta_id in BA window status notif
CVE-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-97409 8.8 HIGH nvme-fc: Do not cancel requests in io target before it is initialized
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
CVE-2026-93793 8.8 HIGH wifi: iwlwifi: mvm: validate TX_CMD response layout
CVE-2026-93790 8.8 HIGH wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
CVE-2026-93284 8.8 HIGH drm/pagemap: dma-unmap pages before handling migration errors
CVE-2026-93280 8.8 HIGH greybus: audio: bound the topology section sizes against the fetched size
CVE-2026-97509 8.8 HIGH thunderbolt: Keep XDomain reference during the lifetime of a service
CVE-2026-93827 8.4 HIGH virtio-fs: avoid double-free on failed queue setup
CVE-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
CVE-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
CVE-2026-97433 8.2 HIGH nvme: validate FDP configuration descriptor sizes
CVE-2026-93787 8.1 HIGH smb: client: bound dirent name against end of SMB response in cifs_filldir
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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