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CVE-2026-64069— netfs: Fix cancellation of a DIO and single read subrequests

CVSS 9.8 · Critical EPSS 0.44% · P36

Possible ATT&CK Techniques 1AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 8

VendorProductVersion RangeStatus
LinuxLinuxe2d46f2ec332533816417b60933954173f602121< 5366199be46fb53de62861721d34ba816e7e440eaffected
e2d46f2ec332533816417b60933954173f602121< f73372a4c6900d117f8e903fe10b62692f95e6c4affected
e2d46f2ec332533816417b60933954173f602121< 6f0f7ac1915abc0d202f0eb4b003a6548a5ba60daffected
6.14affected
< 6.14unaffected
6.18.34≤ 6.18.*unaffected
7.0.11≤ 7.0.*unaffected
7.1≤ *unaffected
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I. Basic Information for CVE-2026-64069

Vulnerability Information
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Vulnerability Title
netfs: Fix cancellation of a DIO and single read subrequests
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix cancellation of a DIO and single read subrequests When the preparation of a new subrequest for a read fails, if the subrequest has already been added to the stream->subrequests list, it can't simply be put and abandoned as the collector may see it. Also, if it hasn't been queued yet, it has two outstanding refs that both need to be put. Both DIO read and single-read dispatch fail at this; further, both differ in the order they do things to the way buffered read works. Fix cancellation of both DIO-read and single-read subrequests that failed preparation by the following steps: (1) Harmonise all three reads (buffered, dio, single) to queue the subreq before prepping it. (2) Make all three call netfs_queue_read() to do the queuing. (3) Set NETFS_RREQ_ALL_QUEUED independently of the queuing as we don't know the length of the subreq at this point. (4) In all cases, set the error and NETFS_SREQ_FAILED flag on the subreq and then call netfs_read_subreq_terminated() to deal with it. This will pass responsibility off to the collector for dealing with it.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于netfs子请求准备失败时取消处理不当，可能导致读取操作错误。以下版本受到影响：6.14版本。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux e2d46f2ec332533816417b60933954173f602121 ~ 5366199be46fb53de62861721d34ba816e7e440e -
LinuxLinux 6.14 -

II. Public POCs for CVE-2026-64069

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III. Intelligence Information for CVE-2026-64069

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Patches & Fixes for CVE-2026-64069 (3)

Same Patch Batch · Linux · 2026-07-19 · 431 CVEs total

CVE-2026-6379510.0 CRITICAL9p: avoid putting oldfid in p9_client_walk() error path
CVE-2026-641029.8 CRITICALRDMA/siw: Reject MPA FPDU length underflow before signed receive math
CVE-2026-640559.8 CRITICALnet: ethernet: cortina: Carry over frag counter
CVE-2026-640569.8 CRITICALnet: ethernet: cortina: Make RX SKB per-port
CVE-2026-640619.8 CRITICALnetfs: Fix early put of sink folio in netfs_read_gaps()
CVE-2026-640669.8 CRITICALnetfs: Fix netfs_read_to_pagecache() to pause on subreq failure
CVE-2026-640679.8 CRITICALnetfs: Fix missing barriers when accessing stream->subrequests locklessly
CVE-2026-640689.8 CRITICALnetfs: Fix missing locking around retry adding new subreqs
CVE-2026-638089.8 CRITICALexfat: fix potential use-after-free in exfat_find_dir_entry()
CVE-2026-640899.8 CRITICALbatman-adv: tt: fix negative last_changeset_len
CVE-2026-640919.8 CRITICALbatman-adv: tt: fix TOCTOU race for reported vlans
CVE-2026-533999.8 CRITICALnfsd: release layout stid on setlease failure
CVE-2026-641429.8 CRITICALksmbd: close durable scavenger races against m_fp_list lookups
CVE-2026-533989.8 CRITICALNFSD: Fix SECINFO_NO_NAME decode error cleanup
CVE-2026-641369.8 CRITICALsmb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()
CVE-2026-641329.8 CRITICALipv6: ioam: refresh hdr pointer before ioam6_event()
CVE-2026-641229.8 CRITICALnet/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover
CVE-2026-640479.8 CRITICALnet: tls: fix off-by-one in sg_chain entry count for wrapped sk_msg ring
CVE-2026-641139.8 CRITICALixgbevf: fix use-after-free in VEPA multicast source pruning
CVE-2026-638009.8 CRITICALpNFS: Fix use-after-free in pnfs_update_layout()

Showing top 20 of 431 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64069

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