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CVE-2026-98569— ip_gre: Reject enabling collect metadata through 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.

在 Linux 内核中，以下漏洞已得到修复： ip_gre：拒绝通过 changelink 启用 collect metadata 功能 函数可以在现有的 GRE、GRETAP 或 ERSPAN 设备上启用 （收集元数据）功能。与 （新建链路）不同， （变更链路）并不强制要求元数据隧道的唯一性。因此，将一个非元数据设备转换为元数据设备时，可能会覆盖同一网络命名空间（netns）中同类型其他设备的元数据接收入口。随后删除其中任意一个设备，都会清除该共享入口，导致幸存设备的元数据接收查找功能失效。 此外，如果在设置 之

AI Predicted 5.5 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 2e15ea390e6f4466655066d97e22ec66870a042c< c80315da84998b69b8829785a174b0bf72a81992 affected
2e15ea390e6f4466655066d97e22ec66870a042c< cff8b520312e750ad38967c30128e1534cbf9484 affected
2e15ea390e6f4466655066d97e22ec66870a042c< 1dc759571f3df14891175fc52527f7624ba01322 affected
2e15ea390e6f4466655066d97e22ec66870a042c< da2e0cfbb620b199927a1e5b93b7cfde32083c7d affected
2e15ea390e6f4466655066d97e22ec66870a042c< 2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c affected
2e15ea390e6f4466655066d97e22ec66870a042c< bdd41b96e814300c66222cf4e47ecb8aef995656 affected
2e15ea390e6f4466655066d97e22ec66870a042c< 63c5e48d6f7f5722a48f63e13e961dc5302894ed affected
2e15ea390e6f4466655066d97e22ec66870a042c< a3f315be9d30eeb6938d11fa17fd4b32d52f7c42 affected
… +10 more rows
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I. Basic Information for CVE-2026-98569

Vulnerability Information
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Vulnerability Title
ip_gre: Reject enabling collect metadata through changelink
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ip_gre: Reject enabling collect metadata through changelink ipgre_netlink_parms() can enable collect_md on an existing GRE, GRETAP or ERSPAN device. Unlike newlink, changelink does not enforce metadata tunnel uniqueness. Converting a non-metadata device can therefore replace the metadata receive entry for another device of the same type in the same netns. Deleting either device then clears the shared entry, breaking metadata receive lookup for the surviving device. If parameter validation fails after collect_md is set, deleting the modified device can also clear an entry it never owned. Reject enabling metadata mode in both changelink callbacks before any encapsulation or tunnel parameters are modified. Allow requests that repeat the metadata attribute on an existing metadata device.
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 2e15ea390e6f4466655066d97e22ec66870a042c ~ c80315da84998b69b8829785a174b0bf72a81992 -
Linux Linux 4.3 -

II. Public POCs for CVE-2026-98569

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III. Intelligence Information for CVE-2026-98569

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Patches & Fixes for CVE-2026-98569 (8)

Same Patch Batch · Linux · 2026-10-18 · 436 CVEs total

CVE-2026-98583 nfc: nfcmrvl: validate helper command length before pull
CVE-2026-98570 net: ipv6: keep room for the mac header in dst_dev_overhead()
CVE-2026-98571 net: stmmac: clear stale buf->page after recycling on skb build failure
CVE-2026-98572 bpf: Fix immediate JMP JEQ/JNE on MIPS32
CVE-2026-98573 net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()
CVE-2026-98574 net: bcmgenet: stop Tx NAPI before disabling the queues
CVE-2026-98575 nfc: pn533: fix OOB read in pn533_acr122_is_rx_frame_valid()
CVE-2026-98576 nfc: llcp: fix slab-out-of-bounds reads when logging service names
CVE-2026-98577 nfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()
CVE-2026-98578 nfc: st21nfca: validate ISO15693 inventory length
CVE-2026-98579 nfc: llcp: fix sdreq TLV list leak on parse/alloc/send failure
CVE-2026-98580 nfc: llcp: Fix race condition in accept_queue lifecycle
CVE-2026-98581 nfc: llcp: Fix list corruption / refcount desync in nfc_llcp_recv_dm()
CVE-2026-98582 nfc: st21nfca: validate received frame size
CVE-2026-98594 tg3: clean up PHYLIB resources on probe failure
CVE-2026-98591 bpf: Fix bounds check for skb-backed dynptrs
CVE-2026-98592 net: spacemit: clear TX descriptor on fragment mapping failure
CVE-2026-98593 s390/debug: Fix NULL pointer dereference in debug_info_copy()
CVE-2026-98590 bpf: Fix bpf_sock context code generation
CVE-2026-98595 udp: remove a disconnected socket from the 4-tuple hash table

Showing top 20 of 436 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98569

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