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CVE-2026-45873— netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets

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netfilter nft_set_rbtree中匿名集合的局部重叠检测逻辑跳过起始元素检查，可能导致添加重叠区间。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.16% · P6

Affected Version Matrix 25

VendorProduct Version RangeStatus
Linux Linux 4aacf3d78424293e318c616016865380b37b9cc5< 7ca5813e1b21ef300e04593f47b073ef3217aac6 affected
2bf1435fa19d2c58054391b3bba40d5510a5758c< 029e5f6a95e905b12d6bc20421be32a01e0eb311 affected
318cb24a4c3fce8140afaf84e4d45fcb76fb280b< f1381ce0a1dd013610985e1c4260908163a427df affected
c9e6978e2725a7d4b6cd23b2facd3f11422c0643< f1535d56fc3f6c625b7e0559c006bd0318791bb1 affected
c9e6978e2725a7d4b6cd23b2facd3f11422c0643< 05feaf826390fd16f1deb89dd9412def3b2a280f affected
c9e6978e2725a7d4b6cd23b2facd3f11422c0643< dad14d22dff1a191612acb98facceb303d0524a2 affected
c9e6978e2725a7d4b6cd23b2facd3f11422c0643< e6497e06a102870803a59570d75ed2c36d7e11b3 affected
c9e6978e2725a7d4b6cd23b2facd3f11422c0643< 4780ec142cbb24b794129d3080eee5cac2943ffc affected
… +17 more rows
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I. Basic Information for CVE-2026-45873

Vulnerability Information
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Vulnerability Title
netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets Userspace provides an optimized representation in case intervals are adjacent, where the end element is omitted. The existing partial overlap detection logic skips anonymous set checks on start elements for this reason. However, it is possible to add intervals that overlap to this anonymous where two start elements with the same, eg. A-B, A-C where C < B. start end A B start end A C Restore the check on overlapping start elements to report an overlap.
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
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netfilter nft_set_rbtree中匿名集合的局部重叠检测逻辑跳过起始元素检查，可能导致添加重叠区间。
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 4aacf3d78424293e318c616016865380b37b9cc5 ~ 7ca5813e1b21ef300e04593f47b073ef3217aac6 -
Linux Linux 6.2 -

II. Public POCs for CVE-2026-45873

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III. Intelligence Information for CVE-2026-45873

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Patches & Fixes for CVE-2026-45873 (8)

Same Patch Batch · Linux · 2026-05-27 · 275 CVEs total

CVE-2026-46039 9.8 CRITICAL rxgk: Fix potential integer overflow in length check
CVE-2026-45898 9.8 CRITICAL RDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-45972 9.8 CRITICAL smb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-45988 9.8 CRITICAL rxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-46043 9.1 CRITICAL RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-45945 8.8 HIGH iommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-46056 8.8 HIGH Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2025-71311 8.2 HIGH fs/ntfs3: Initialize new folios before use
CVE-2026-46037 8.2 HIGH ipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-45843 8.2 HIGH slip: bound decode() reads against the compressed packet length
CVE-2026-46010 8.1 HIGH rxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-46099 8.1 HIGH net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-46076 7.9 HIGH KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-45910 7.8 HIGH RDMA/rxe: Fix race condition in QP timer handlers
CVE-2026-45862 7.8 HIGH iommu/vt-d: Flush cache for PASID table before using it
CVE-2026-45956 7.8 HIGH drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()
CVE-2026-46036 7.8 HIGH vfio/cdx: Serialize VFIO_DEVICE_SET_IRQS with a per-device mutex
CVE-2026-46100 7.8 HIGH fs: afs: revert mmap_prepare() change
CVE-2026-45894 7.8 HIGH iommu/vt-d: Clear Present bit before tearing down PASID entry
CVE-2026-45933 7.8 HIGH bpf: Preserve id of register in sync_linked_regs()

Showing top 20 of 275 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-45873

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