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CVE-2025-21761— openvswitch: use RCU protection in ovs_vport_cmd_fill_info()

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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ovs_vport_cmd_fill_info函数未使用RCU保护，可能导致释放后重用。

CVSS 7.8 · High EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 9354d452034273a50a4fd703bea31e5d6b1fc20b< e85a25d1a9985645e796039e843d1de581d2de1e affected
9354d452034273a50a4fd703bea31e5d6b1fc20b< a8816b3f1f151373fd30f1996f00480126c8bb11 affected
9354d452034273a50a4fd703bea31e5d6b1fc20b< a884f57600e463f69d7b279c4598b865260b62a1 affected
9354d452034273a50a4fd703bea31e5d6b1fc20b< 7e01abc34e87abd091e619161a20f54ed4e3e2da affected
9354d452034273a50a4fd703bea31e5d6b1fc20b< 8ec57509c36c8b9a23e50b7858dda0c520a2d074 affected
9354d452034273a50a4fd703bea31e5d6b1fc20b< a849a10de5e04d798f7f286a2f1ca174719a617a affected
9354d452034273a50a4fd703bea31e5d6b1fc20b< 5828937742af74666192835d657095d95c53dbd0 affected
9354d452034273a50a4fd703bea31e5d6b1fc20b< 90b2f49a502fa71090d9f4fe29a2f51fe5dff76d affected
… +10 more rows
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I. Basic Information for CVE-2025-21761

Vulnerability Information
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Vulnerability Title
openvswitch: use RCU protection in ovs_vport_cmd_fill_info()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: openvswitch: use RCU protection in ovs_vport_cmd_fill_info() ovs_vport_cmd_fill_info() can be called without RTNL or RCU. Use RCU protection and dev_net_rcu() to avoid potential UAF.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ovs_vport_cmd_fill_info函数未使用RCU保护，可能导致释放后重用。
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 9354d452034273a50a4fd703bea31e5d6b1fc20b ~ e85a25d1a9985645e796039e843d1de581d2de1e -
Linux Linux 4.15 -

II. Public POCs for CVE-2025-21761

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III. Intelligence Information for CVE-2025-21761

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Patches & Fixes for CVE-2025-21761 (5)

Other References for CVE-2025-21761 (2)

Same Patch Batch · Linux · 2025-02-27 · 177 CVEs total

CVE-2025-21805 9.8 CRITICAL RDMA/rtrs: Add missing deinit() call
CVE-2025-21707 9.8 CRITICAL mptcp: consolidate suboption status
CVE-2025-21748 9.8 CRITICAL ksmbd: fix integer overflows on 32 bit systems
CVE-2025-21796 9.8 CRITICAL nfsd: clear acl_access/acl_default after releasing them
CVE-2024-58006 9.6 CRITICAL PCI: dwc: ep: Prevent changing BAR size/flags in pci_epc_set_bar()
CVE-2024-57997 8.8 HIGH wifi: wcn36xx: fix channel survey memory allocation size
CVE-2024-57995 8.8 HIGH wifi: ath12k: fix read pointer after free in ath12k_mac_assign_vif_to_vdev()
CVE-2024-57999 8.8 HIGH powerpc/pseries/iommu: IOMMU incorrectly marks MMIO range in DDW
CVE-2025-21735 8.8 HIGH NFC: nci: Add bounds checking in nci_hci_create_pipe()
CVE-2025-21710 8.2 HIGH tcp: correct handling of extreme memory squeeze
CVE-2025-21766 8.1 HIGH ipv4: use RCU protection in __ip_rt_update_pmtu()
CVE-2024-57973 8.1 HIGH rdma/cxgb4: Prevent potential integer overflow on 32bit
CVE-2025-21762 8.1 HIGH arp: use RCU protection in arp_xmit()
CVE-2025-21760 8.1 HIGH ndisc: extend RCU protection in ndisc_send_skb()
CVE-2025-21765 8.1 HIGH ipv6: use RCU protection in ip6_default_advmss()
CVE-2025-21738 7.8 HIGH ata: libata-sff: Ensure that we cannot write outside the allocated buffer
CVE-2025-21729 7.8 HIGH wifi: rtw89: fix race between cancel_hw_scan and hw_scan completion
CVE-2025-21730 7.8 HIGH wifi: rtw89: avoid to init mgnt_entry list twice when WoWLAN failed
CVE-2025-21801 7.8 HIGH net: ravb: Fix missing rtnl lock in suspend/resume path
CVE-2024-54458 7.8 HIGH scsi: ufs: bsg: Set bsg_queue to NULL after removal

Showing top 20 of 177 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21761

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