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CVE-2026-72136— xfrm: xfrm_interface: require CAP_NET_ADMIN in the device netns for changelink

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xfrmi_changelink()函数在设备网络命名空间中未充分检查CAP_NET_ADMIN权限，可能导致具有dev_net(dev)权限的攻击者重写位于其他网络命名空间的接口。

CVSS 8.8 · High EPSS 0.17% · P6

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux f203b76d78092faf248db3f851840fbecf80b40e< 04c1aa57d08471b1953bf27c84ac9b3d78d71831 affected
f203b76d78092faf248db3f851840fbecf80b40e< bdfd1c21d90e628a58a9de79e024cdfcbedfa15c affected
f203b76d78092faf248db3f851840fbecf80b40e< 80ec68bba11f7f387c0e4099c2d7b2c84943eb99 affected
f203b76d78092faf248db3f851840fbecf80b40e< e9c90756f10da334fb31552e52c61f1dba69f491 affected
f203b76d78092faf248db3f851840fbecf80b40e< 37b61946d278c7deb0d40ba8f2b6fc0478d61dab affected
f203b76d78092faf248db3f851840fbecf80b40e< 8ca2a19a987a7d1cb4c916ed9723a1c6993b4276 affected
f203b76d78092faf248db3f851840fbecf80b40e< 3ba2b2ef7d6a63b190f15cfc2b4ba0fba59928ea affected
f203b76d78092faf248db3f851840fbecf80b40e< 095515d89b19b6cc19dfcdc846f97403ed1ebce3 affected
… +10 more rows
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I. Basic Information for CVE-2026-72136

Vulnerability Information
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Vulnerability Title
xfrm: xfrm_interface: require CAP_NET_ADMIN in the device netns for changelink
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: xfrm_interface: require CAP_NET_ADMIN in the device netns for changelink xfrmi_changelink() operates on at most two netns, dev_net(dev) and the interface link netns xi->net. They differ once the device is created in or moved to a netns other than the one the request runs in. The rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev), so a caller privileged there but not in xi->net can rewrite an interface that lives in xi->net. Gate xfrmi_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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xfrmi_changelink()函数在设备网络命名空间中未充分检查CAP_NET_ADMIN权限，可能导致具有dev_net(dev)权限的攻击者重写位于其他网络命名空间的接口。
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 f203b76d78092faf248db3f851840fbecf80b40e ~ 04c1aa57d08471b1953bf27c84ac9b3d78d71831 -
Linux Linux 4.19 -

II. Public POCs for CVE-2026-72136

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III. Intelligence Information for CVE-2026-72136

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Patches & Fixes for CVE-2026-72136 (8)

Same Patch Batch · Linux · 2026-08-15 · 844 CVEs total

CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-74495 9.8 CRITICAL igbvf: Fix leak in TX DMA error cleanup
CVE-2026-74394 9.8 CRITICAL RDMA/srpt: fix integer overflow in immediate data length check
CVE-2026-72417 9.8 CRITICAL netfilter: flowtable: Validate iph->ihl in nf_flow_ip4_tunnel_proto()
CVE-2026-72069 9.8 CRITICAL locking/rt: Fix the incorrect RCU protection in rt_spin_unlock()
CVE-2026-72422 9.8 CRITICAL ksmbd: fix use-after-free of conn->preauth_info in concurrent SMB2 NEGOTIATE
CVE-2026-72065 9.8 CRITICAL net: mana: Validate the packet length reported by the NIC
CVE-2026-72064 9.8 CRITICAL net: mana: Sync page pool RX frags for CPU
CVE-2026-72251 9.8 CRITICAL netfilter: nf_nat_sip: reload possible stale data pointer
CVE-2026-72249 9.8 CRITICAL netfilter: flowtable: use dst in this direction when pushing IPIP header
CVE-2026-72046 9.8 CRITICAL gve: fix header buffer corruption with header-split and HW-GRO
CVE-2026-72226 9.8 CRITICAL batman-adv: tt: prevent TVLV OOB check overflow
CVE-2026-72041 9.8 CRITICAL espintcp: use sk_msg_free_partial to fix partial send

Showing top 20 of 844 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-72136

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