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CVE-2026-80836— crypto: virtio - bound the akcipher result length

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virtio_crypto_dataq_akcipher_callback函数未将设备报告的响应长度限制在目标缓冲区范围内，导致sg_copy_from_buffer读取过多数据，造成越界读取。

AI Predicted 4.0 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a< bd33cb19bcb432a4dd5e8f50be5e2547af1e9f78 affected
a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a< 12c4f29e97f31b013f77ad65ba7daeb02aaa6abe affected
a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a< 5545de5050cbc3594506d74f2c392b0716cf8bca affected
a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a< 3fda114a42f1510a4ec8a0b17a0cfc997952ccc2 affected
a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a< 1f9f877b1ef1fbd4ee95571cddf39c8002cee252 affected
a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a< f77a956f6a19f9463ef1527c9d0cda50dded6b92 affected
5.19 affected
< 5.19 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-80836

Vulnerability Information
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Vulnerability Title
crypto: virtio - bound the akcipher result length
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: crypto: virtio - bound the akcipher result length virtio_crypto_dataq_akcipher_callback() sets the result length from the device-reported response length without bounding it to the destination buffer, which was allocated for the original request length. sg_copy_from_buffer() then reads that many bytes from the destination buffer; a backend reporting a larger length over-reads adjacent kernel heap into the caller's scatterlist (an out-of-bounds read). Clamp the reported length to the originally requested destination length. A conforming device reports no more than that, so valid results are unaffected.
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virtio_crypto_dataq_akcipher_callback函数未将设备报告的响应长度限制在目标缓冲区范围内，导致sg_copy_from_buffer读取过多数据，造成越界读取。
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 a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a ~ bd33cb19bcb432a4dd5e8f50be5e2547af1e9f78 -
Linux Linux 5.19 -

II. Public POCs for CVE-2026-80836

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III. Intelligence Information for CVE-2026-80836

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Patches & Fixes for CVE-2026-80836 (5)

Other References for CVE-2026-80836 (1)

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-2026-80836

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