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CVE-2026-80779— net/ionic: avoid OOB TX partner lookup for hwstamp RXQ

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net/ionic驱动对硬件时间戳RX队列进行TX伙伴查找时索引处理不当，导致越界读取txqcqs数组并通过派生指针进行写入，可能造成内存越界读写。

AI Predicted 5.5 Difficulty: Hard EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 8eeed8373e1cca836799bf8e4a05cffa8e444908< 881a805a8029ba48c0ce81c6674910f8d83f7afb affected
8eeed8373e1cca836799bf8e4a05cffa8e444908< 39fc615e355b65b8d43be30da57aa95ae6eaf688 affected
8eeed8373e1cca836799bf8e4a05cffa8e444908< f3868046e8e2e761d4d943a232bd109ff22a7d5b affected
8eeed8373e1cca836799bf8e4a05cffa8e444908< ea081b4435515ac7177eb598a3c0678d1b9e7911 affected
8eeed8373e1cca836799bf8e4a05cffa8e444908< d92255b405fb6f5acca408239ccd742e0a42c9cb affected
6.9 affected
< 6.9 unaffected
6.12.106≤ 6.12.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-80779

Vulnerability Information
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Vulnerability Title
net/ionic: avoid OOB TX partner lookup for hwstamp RXQ
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/ionic: avoid OOB TX partner lookup for hwstamp RXQ The dedicated hardware timestamp RX queue is allocated with q->index equal to lif->ionic->nrxqs_per_lif. The normal txqcqs array only contains the regular queue pairs, so using that index to set rxq->partner can read one entry past txqcqs[] and then write through the derived pointer. Only link RX/TX partners for normal queue-pair indexes. Leave the hwstamp RX queue unpaired, and make the XDP_TX path abort cleanly if an RX queue has no TX partner.
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net/ionic驱动对硬件时间戳RX队列进行TX伙伴查找时索引处理不当，导致越界读取txqcqs数组并通过派生指针进行写入，可能造成内存越界读写。
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 8eeed8373e1cca836799bf8e4a05cffa8e444908 ~ 881a805a8029ba48c0ce81c6674910f8d83f7afb -
Linux Linux 6.9 -

II. Public POCs for CVE-2026-80779

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III. Intelligence Information for CVE-2026-80779

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Patches & Fixes for CVE-2026-80779 (5)

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

CVE-2026-80865 bpf: Add missing access_ok call to copy_user_syms
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-2026-80864 RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp
CVE-2026-80870 drm/amdkfd: Validate CRIU-restored IDs before idr_alloc
CVE-2026-80874 arm64: dts: renesas: ironhide: Describe inline ECC carveouts
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-2026-80868 ntfs3: Allocate iomap inline_data using alloc_page
CVE-2026-80866 tipc: avoid busy looping in tipc_exit_net()
CVE-2026-80867 alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
CVE-2026-80855 fuse: fix invalidate lock leak on open O_TRUNC DAX failure
CVE-2026-80869 ntfs: bound the attribute-list entry in ntfs_read_inode_mount()

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-2026-80779

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