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CVE-2026-72052— net: ip6_gre: 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ip6gre_changelink()和ip6erspan_changelink()函数对网络命名空间的权限检查不充分，可能导致具备设备网络命名空间权限但无隧道链路网络命名空间权限的调用者重写隧道配置。

CVSS 8.8 · High EPSS 0.16% · P6

Possible ATT&CK Techniques 1 AI

T1098.004 · SSH Authorized Keys

Affected Version Matrix 22

VendorProduct Version RangeStatus
Linux Linux 690afc165bb314354667f67157c1a1aea7dc797a< 129f8939e5af683cec3a1a5edcb40a64636ad81e affected
690afc165bb314354667f67157c1a1aea7dc797a< e3724dedf57761c6de52f4d604ec74f66fd61611 affected
690afc165bb314354667f67157c1a1aea7dc797a< 220162c9fedbe992da70d70f50a10da4f45f914c affected
690afc165bb314354667f67157c1a1aea7dc797a< 1d4d8ee002083ca4ead5353662bf8362428af57f affected
690afc165bb314354667f67157c1a1aea7dc797a< 0caa9f348f8b5356900de77b0bb89a697c4aff20 affected
690afc165bb314354667f67157c1a1aea7dc797a< 03d8843b143ebbbfaf48511922abc6e886575a61 affected
690afc165bb314354667f67157c1a1aea7dc797a< c38c8b0db3c65b597e7ece317b6cb59de3d15e69 affected
690afc165bb314354667f67157c1a1aea7dc797a< f00a50876d2818bd6dc86fa98b3ef360884c53c8 affected
… +14 more rows
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I. Basic Information for CVE-2026-72052

Vulnerability Information
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Vulnerability Title
net: ip6_gre: 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_gre: require CAP_NET_ADMIN in the device netns for changelink ip6gre_changelink() and ip6erspan_changelink() operate 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 both ops on rtnl_dev_link_net_capable() at their 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ip6gre_changelink()和ip6erspan_changelink()函数对网络命名空间的权限检查不充分，可能导致具备设备网络命名空间权限但无隧道链路网络命名空间权限的调用者重写隧道配置。
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 690afc165bb314354667f67157c1a1aea7dc797a ~ 129f8939e5af683cec3a1a5edcb40a64636ad81e -
Linux Linux 5.5 -

II. Public POCs for CVE-2026-72052

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III. Intelligence Information for CVE-2026-72052

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Patches & Fixes for CVE-2026-72052 (8)

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-2026-72052

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