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CVE-2026-80820— xfs: don't livelock in scrub on a circular unlinked list

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 scrub在处理包含循环的unlinked inode列表时未检测循环，可能导致在线fsck活锁（livelock）。

AI Predicted 7.8 Difficulty: Hard EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1624

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux a12890aebb895951720ff884eab1c99a30645b29< 599453f83458b57995290a1d31200c263e2c2691 affected
a12890aebb895951720ff884eab1c99a30645b29< 159d162fe80bd56573cafde5801bd5a90a3dd1ac affected
a12890aebb895951720ff884eab1c99a30645b29< 56407a61a8bb85b884de802d39635abdb0ea7408 affected
a12890aebb895951720ff884eab1c99a30645b29< 527eaaefddb6ec5c83a06c9a1559960dd6361753 affected
4.15 affected
< 4.15 unaffected
6.12.106≤ 6.12.* unaffected
6.18.47≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-80820

Vulnerability Information
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Vulnerability Title
xfs: don't livelock in scrub on a circular unlinked list
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: xfs: don't livelock in scrub on a circular unlinked list LOLLM points out that online fsck can livelock if an unlinked inode list contains a loop. Use a bitmap to detect cycles.
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 scrub在处理包含循环的unlinked inode列表时未检测循环，可能导致在线fsck活锁（livelock）。
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 a12890aebb895951720ff884eab1c99a30645b29 ~ 599453f83458b57995290a1d31200c263e2c2691 -
Linux Linux 4.15 -

II. Public POCs for CVE-2026-80820

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III. Intelligence Information for CVE-2026-80820

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Patches & Fixes for CVE-2026-80820 (3)

Mailing List Discussions for CVE-2026-80820 (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-2026-80820

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