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CVE-2026-80831— crypto: mxs-dcp - fix source scatterlist length access

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 3.14版本存在安全漏洞，该漏洞源于mxs_dcp_aes_block_crypt()函数在未使用dma_map_sg()映射源scatterlist的情况下调用sg_dma_len()，可能导致返回无效或过期的DMA长度，从而造成加密和解密处理错误的字节数。

AI Predicted 3.5 Difficulty: Theoretical EPSS 0.17% · P5

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5< fd0f211b27a6ec2ebd8c315683401b43adcc5511 affected
15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5< 04201dcc88b26eac52f736e39727fc5c420b7257 affected
15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5< e72a795df521cb65b7c4705cc11078cdacfaa2f4 affected
15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5< 1537bd55b4f842565068c54b47cd2ae1777d5f8f affected
15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5< da14fae5203b72ca71ccfa9af8de9249e40d533a affected
15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5< 182f16a20d329a1c818d51dad57d9bf43d356c7c affected
15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5< 0e9edb108a63bbbef952dfcbc597e34ed9c1fb74 affected
15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5< 6ef9a4afb52cb102ab038cd42352c142d8505d09 affected
… +12 more rows
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I. Basic Information for CVE-2026-80831

Vulnerability Information
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Vulnerability Title
crypto: mxs-dcp - fix source scatterlist length access
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: crypto: mxs-dcp - fix source scatterlist length access mxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source scatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid and could return zero or a stale DMA length, causing encryption and decryption to process the wrong number of bytes when CONFIG_NEED_SG_DMA_LENGTH=y. Use the original scatterlist length instead.
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 3.14版本存在安全漏洞，该漏洞源于mxs_dcp_aes_block_crypt()函数在未使用dma_map_sg()映射源scatterlist的情况下调用sg_dma_len()，可能导致返回无效或过期的DMA长度，从而造成加密和解密处理错误的字节数。
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 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 ~ fd0f211b27a6ec2ebd8c315683401b43adcc5511 -
Linux Linux 3.14 -

II. Public POCs for CVE-2026-80831

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III. Intelligence Information for CVE-2026-80831

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Patches & Fixes for CVE-2026-80831 (8)

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-2026-80831

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