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CVE-2026-72055— net: ip6_vti: 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 3.15版本存在安全漏洞，该漏洞源于vti6_changelink函数仅检查设备网络命名空间的CAP_NET_ADMIN权限，未检查隧道网络命名空间的权限，可能导致攻击者重写其他网络命名空间中的隧道。

CVSS 8.8 · High EPSS 0.16% · P6

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 61220ab349485d911083d0b7990ccd3db6c63297< f5254e7766b4ac02b66b2ccef896cd278503cb11 affected
61220ab349485d911083d0b7990ccd3db6c63297< ef897249dc957089e6f7f11ceea699e093ad51bd affected
61220ab349485d911083d0b7990ccd3db6c63297< f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba affected
61220ab349485d911083d0b7990ccd3db6c63297< c64b9ae7eb97e81d54b792910a3aeafd92566c79 affected
61220ab349485d911083d0b7990ccd3db6c63297< b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf affected
61220ab349485d911083d0b7990ccd3db6c63297< 0b2f9c908f930ec4be17d389723f9a202d6a883c affected
61220ab349485d911083d0b7990ccd3db6c63297< f97e93ebf2f9b8ef3b87f7a9371255e84d151587 affected
61220ab349485d911083d0b7990ccd3db6c63297< e2ac3b242c37dff323a964962e43854f4b1a2b79 affected
… +10 more rows
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I. Basic Information for CVE-2026-72055

Vulnerability Information
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Vulnerability Title
net: ip6_vti: 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: net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink vti6_changelink() operates on at most two netns, dev_net(dev) and the tunnel link netns t->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 t->net can rewrite a tunnel that lives in t->net. Gate vti6_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 3.15版本存在安全漏洞，该漏洞源于vti6_changelink函数仅检查设备网络命名空间的CAP_NET_ADMIN权限，未检查隧道网络命名空间的权限，可能导致攻击者重写其他网络命名空间中的隧道。
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 61220ab349485d911083d0b7990ccd3db6c63297 ~ f5254e7766b4ac02b66b2ccef896cd278503cb11 -
Linux Linux 3.15 -

II. Public POCs for CVE-2026-72055

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III. Intelligence Information for CVE-2026-72055

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Patches & Fixes for CVE-2026-72055 (7)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72206 9.8 CRITICAL ntfs: validate index block header more strictly
CVE-2026-72317 9.8 CRITICAL SUNRPC: pin upper rpc_clnt across the TLS connect_worker
CVE-2026-72208 9.8 CRITICAL ntfs: add bounds check before accessing EA entries
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-2026-74427 9.8 CRITICAL afs: Fix netns teardown to cancel the preallocation charger
CVE-2026-72137 9.8 CRITICAL xfrm: nat_keepalive: avoid double free on send error
CVE-2026-74428 9.8 CRITICAL rxrpc: Fix double unlock in rxrpc_recvmsg()
CVE-2026-72429 9.8 CRITICAL ipv6: ioam: fix type confusion of dst_entry
CVE-2026-72139 9.8 CRITICAL tcp: defer md5sig_info kfree past RCU grace period in tcp_connect
CVE-2026-74433 9.8 CRITICAL rxrpc: Fix UAF in rxgk_issue_challenge()
CVE-2026-72046 9.8 CRITICAL gve: fix header buffer corruption with header-split and HW-GRO

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-72055

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