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CVE-2026-80826— USB: c67x00: fix use-after-free in c67x00_add_iso_urb()

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USB c67x00驱动c67x00_add_iso_urb函数在TD创建失败时提前归还URB，导致后续访问已释放内存，造成释放后重用。

AI Predicted 6.0 Difficulty: Hard EPSS 0.19% · P9

Possible ATT&CK Techniques 1 AI

T1042

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d< e4039e9bebb528dd9cd7ac72aeaec529c26c355a affected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d< ade18b4ce78a16558f4f435aece80082f6f7b64c affected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d< bb572801290e25ec1c4753d14af35777303f5d6b affected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d< 62cd519ab74cac499036cd88c11692f8f0d53e14 affected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d< ff172092cba7ec990ecc7b610ce703e19570b8f0 affected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d< b4cb8081cf80f82e48fbe9c021a8f6d0fa2ed421 affected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d< 7983daa159981fac125db2457437723f38ea1472 affected
e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d< f24dcc61bd0ecf7639fac5bf700450b398d793a7 affected
… +12 more rows
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I. Basic Information for CVE-2026-80826

Vulnerability Information
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Vulnerability Title
USB: c67x00: fix use-after-free in c67x00_add_iso_urb()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: USB: c67x00: fix use-after-free in c67x00_add_iso_urb() When TD creation fails for the last packet of an isochronous URB, c67x00_add_iso_urb() gives the URB back before updating the endpoint scheduling state. c67x00_giveback_urb() frees the URB private data, and the completion callback may release the final URB reference. The following accesses to urbp->ep_data, urb->interval, and urbp->cnt can therefore use freed memory. Update next_frame and cnt before giving back the failed final packet, making the giveback the last operation that uses the URB and its private data.
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USB c67x00驱动c67x00_add_iso_urb函数在TD创建失败时提前归还URB，导致后续访问已释放内存，造成释放后重用。
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 e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d ~ e4039e9bebb528dd9cd7ac72aeaec529c26c355a -
Linux Linux 2.6.26 -

II. Public POCs for CVE-2026-80826

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III. Intelligence Information for CVE-2026-80826

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Patches & Fixes for CVE-2026-80826 (9)

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-2026-80826

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