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CVE-2026-80805— xfs: validate attr entry pointer before field 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存在安全漏洞，该漏洞源于xfs_attr3_leaf_verify_entry函数在访问条目字段前未验证条目指针是否在边界内，可能导致越界读取。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.19% · P9

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux c84760659dcf237902d4cc997cd5f55cb3b2807f< 0f82586741e39926542f621bafa424e237a04fa4 affected
c84760659dcf237902d4cc997cd5f55cb3b2807f< 134d82a2b5e3eba3ebf58753a1387b22f26ca1de affected
c84760659dcf237902d4cc997cd5f55cb3b2807f< 03a12253dd2a036545bdb0110a4e0b8dc70f8e7c affected
c84760659dcf237902d4cc997cd5f55cb3b2807f< e99120b5944a16d0bc27e52b33de78bcdaaabf5c affected
c84760659dcf237902d4cc997cd5f55cb3b2807f< 98a42bb9d60d42898c3494de351a1bf508348cde affected
c84760659dcf237902d4cc997cd5f55cb3b2807f< 184c1a80421a5b5ddcd262e47980ce2e67fee211 affected
c84760659dcf237902d4cc997cd5f55cb3b2807f< 9f92e749fc08b7ff3d9da190c4d1b2273745b282 affected
c84760659dcf237902d4cc997cd5f55cb3b2807f< c35da2bac6f7cb9a9be73f188b4fcc324615c327 affected
… +12 more rows
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I. Basic Information for CVE-2026-80805

Vulnerability Information
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Vulnerability Title
xfs: validate attr entry pointer before field access
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: xfs: validate attr entry pointer before field access xfs_attr3_leaf_verify_entry() accesses lentry/rentry fields (namelen, valuelen) before checking if the entry pointer itself is within bounds. If nameidx is crafted to point near the end of the buffer, these field accesses can read out-of-bounds before the bounds check at name_end > buf_end is performed. Add explicit bounds checks for entry pointers before accessing their fields. Use offsetof() to check that the start of the flexible array member (nameval/name) is within bounds, which ensures all preceding fields are safe to access.
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xfs_attr3_leaf_verify_entry函数在访问条目字段前未验证条目指针是否在边界内，可能导致越界读取。
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 c84760659dcf237902d4cc997cd5f55cb3b2807f ~ 0f82586741e39926542f621bafa424e237a04fa4 -
Linux Linux 5.5 -

II. Public POCs for CVE-2026-80805

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III. Intelligence Information for CVE-2026-80805

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Patches & Fixes for CVE-2026-80805 (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-2026-80805

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