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CVE-2026-80875— ipvs: use parsed transport offset in TCP state lookup

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IPVS在TCP状态查找时未使用已解析的传输头偏移，而是使用IPv6固定头部大小，导致当IPv6数据包携带扩展头时TCP状态处理查看错误的字节。

AI Predicted 4.4 Difficulty: Moderate EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1107

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 0bbdd42b7efa66685b6d74701bcde3a596a3a59d< 2d06e0897ce18228d199887f0823b431d841dd03 affected
0bbdd42b7efa66685b6d74701bcde3a596a3a59d< 816efb7fc0aeae986e63ac73b428dd97a4ef69f5 affected
0bbdd42b7efa66685b6d74701bcde3a596a3a59d< 5848e914b85e360a2dd9d19c00a72e2ea9617dd0 affected
0bbdd42b7efa66685b6d74701bcde3a596a3a59d< d45f73c274435703e8d7bc9d8b742a5d9111ab6e affected
0bbdd42b7efa66685b6d74701bcde3a596a3a59d< f6f550f26562d191c30b2818e7925dcb1c7f166c affected
0bbdd42b7efa66685b6d74701bcde3a596a3a59d< d73f4249776dd970ad65a69cfc51613dd8a034bb affected
0bbdd42b7efa66685b6d74701bcde3a596a3a59d< c2ee845e292c278fac75bf28d96bc892607fd5c4 affected
0bbdd42b7efa66685b6d74701bcde3a596a3a59d< 2500fa3958b1ba51c2b065e39db1b04dfa7e23a2 affected
… +10 more rows
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I. Basic Information for CVE-2026-80875

Vulnerability Information
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Vulnerability Title
ipvs: use parsed transport offset in TCP state lookup
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ipvs: use parsed transport offset in TCP state lookup TCP state handling reparses the skb to find the TCP header. For IPv6 it uses sizeof(struct ipv6hdr), while the surrounding IPVS code already parsed the packet with ip_vs_fill_iph_skb() and has the real transport-header offset in iph.len. This makes TCP state handling look at the wrong bytes when an IPv6 packet carries extension headers. Use the parsed transport offset passed down from ip_vs_set_state() when reading the TCP header. For IPv4 and for IPv6 packets without extension headers, the passed offset matches the previous value.
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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于IPVS在TCP状态查找时未使用已解析的传输头偏移，而是使用IPv6固定头部大小，导致当IPv6数据包携带扩展头时TCP状态处理查看错误的字节。
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 0bbdd42b7efa66685b6d74701bcde3a596a3a59d ~ 2d06e0897ce18228d199887f0823b431d841dd03 -
Linux Linux 2.6.28 -

II. Public POCs for CVE-2026-80875

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III. Intelligence Information for CVE-2026-80875

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Patches & Fixes for CVE-2026-80875 (8)

Same Patch Batch · Linux · 2026-09-04 · 156 CVEs total

CVE-2026-80864 RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp
CVE-2026-80855 fuse: fix invalidate lock leak on open O_TRUNC DAX failure
CVE-2026-80856 fuse: fix invalidate lock leak on setattr writeback failure
CVE-2026-80857 fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
CVE-2026-80858 fuse: publish io-uring queues with release semantics
CVE-2026-80859 fuse: fix missing barrier when checking io-uring readiness
CVE-2026-80860 fuse: fix race between interrupt and resend
CVE-2026-80861 usb: xhci: bail out of setup if the controller is inaccessible
CVE-2026-80862 nvme-tcp: fix usage of page_frag_cache
CVE-2026-80863 RDMA/rxe: Fix OOB in free_rd_atomic_resources()
CVE-2026-80869 ntfs: bound the attribute-list entry in ntfs_read_inode_mount()
CVE-2026-80873 KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions
CVE-2026-80872 ALSA: hda/tas2781: Cancel async firmware request at unbind
CVE-2026-80871 crypto: xilinx-trng - Remove crypto_rng interface
CVE-2026-80870 drm/amdkfd: Validate CRIU-restored IDs before idr_alloc
CVE-2026-80867 alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
CVE-2026-80865 bpf: Add missing access_ok call to copy_user_syms
CVE-2026-80866 tipc: avoid busy looping in tipc_exit_net()
CVE-2026-80854 usb: gadget: f_tcm: keep port count until LUN teardown completes
CVE-2026-80868 ntfs3: Allocate iomap inline_data using alloc_page

Showing top 20 of 156 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80875

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