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CVE-2026-80865— bpf: Add missing access_ok call to copy_user_syms

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copy_user_syms函数在使用__get_user前缺少access_ok调用，可能导致内核访问未经验证的用户空间指针。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.16% · P6

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 0236fec57a15dc2a068dfe4488e0c2ab4559b1ec< a67f7f9647cb243b3be32163e88e5bc76e3d51e9 affected
0236fec57a15dc2a068dfe4488e0c2ab4559b1ec< 8b719cef5ac30ab83ce5693c5faf10e4944874af affected
0236fec57a15dc2a068dfe4488e0c2ab4559b1ec< 128391b57e0977c35243672a6f970073651f3831 affected
0236fec57a15dc2a068dfe4488e0c2ab4559b1ec< 0b6252afcd1965f77c6a6f8a802a2e1381822b98 affected
0236fec57a15dc2a068dfe4488e0c2ab4559b1ec< 28ce7bcf8a29aa395b60764df4c97be745de89d0 affected
0236fec57a15dc2a068dfe4488e0c2ab4559b1ec< d5dc200c3a3f217de072af269dd90adddf90e48d affected
5.19 affected
< 5.19 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-80865

Vulnerability Information
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Vulnerability Title
bpf: Add missing access_ok call to copy_user_syms
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Add missing access_ok call to copy_user_syms As reported by sashiko we use __get_user without prior access_ok call on the user space pointer. Adding the missing call for the whole pointer array. Plus removing the err check in the error path, because it's not needed and also we can return -ENOMEM directly from the first kvmalloc_array fail path. [1] https://lore.kernel.org/bpf/20260611115503.AC16D1F00893@smtp.kernel.org/
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copy_user_syms函数在使用__get_user前缺少access_ok调用，可能导致内核访问未经验证的用户空间指针。
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 0236fec57a15dc2a068dfe4488e0c2ab4559b1ec ~ a67f7f9647cb243b3be32163e88e5bc76e3d51e9 -
Linux Linux 5.19 -

II. Public POCs for CVE-2026-80865

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III. Intelligence Information for CVE-2026-80865

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Patches & Fixes for CVE-2026-80865 (6)

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-2026-80870 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-2026-80854 usb: gadget: f_tcm: keep port count until LUN teardown completes
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-2026-80865

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