CVE-2026-64425
- Source
- https://cve.org/CVERecord?id=CVE-2026-64425
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64425.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-64425
- Downstream
- Published
- 2026-07-25T08:51:03.036Z
- Modified
- 2026-07-27T04:03:20.106662630Z
- Summary
- io_uring/io-wq: re-check IO_WQ_BIT_EXIT for each linked work item
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
iouring/io-wq: re-check IOWQBITEXIT for each linked work item
commit 10dc95939817 ("iouring/io-wq: check IOWQBITEXIT inside work run loop") fixed the obvious case where ioworkerhandle_work() took one exit-bit snapshot before draining pending work, but the fix stops one level too early.
ioworkerhandlework() now re-checks IOWQBITEXIT in its outer work run loop, yet it still snapshots that bit once before processing a whole dependent linked-work chain. If iowqexitstart() sets IOWQBITEXIT after the first linked item has started, the remaining linked items can still reuse stale dokill = false, skip IOWQWORKCANCEL, and continue running after exit has begun.
Move the check further inside, so it covers linked items too. Note: this is a syzbot special as it loves setting up tons of slow linked work on weird devices like msr that take forever to read, and immediately close the ring. Exit then takes a long time.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64425.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/14b7ecad2ec56699325180a744f4b19f046401bb
- https://git.kernel.org/stable/c/1636d85dc139b07c0449308f2bb5e0c7a2e0da99
- https://git.kernel.org/stable/c/29bef9934b2521f787bb15dd1985d4c0d12ae02a
- https://git.kernel.org/stable/c/6e2f51f3e06773c2ee98ad09738f0908b48f76f9
- https://git.kernel.org/stable/c/ab85765cbe3258b43dc6729af0e6ce3a87a133d8
- https://git.kernel.org/stable/c/b6f179a653a934736c88d820fe0098c3c2532549
- https://git.kernel.org/stable/c/d179533c610e1b4c6aa436e3c1fd1b719d2c727c
- https://git.kernel.org/stable/c/ea61b04e1d7242cb37f5ed2cc91cf21a493f6597
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64425.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-64425
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced065dd936195a3466b8ebe5f9287400987ee3c063Fixed14b7ecad2ec56699325180a744f4b19f046401bb
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced27e47500fac23d15b7dc93ff650bc4844d2581bdFixedd179533c610e1b4c6aa436e3c1fd1b719d2c727c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd05d99573f81a091547b1778b9a50120f5d6c68aFixed6e2f51f3e06773c2ee98ad09738f0908b48f76f9
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced85eb83694a91c89d9abe615d717c0053c3efa714Fixedea61b04e1d7242cb37f5ed2cc91cf21a493f6597
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced2e8ca1078b14142db2ce51cbd18ff9971560046bFixedb6f179a653a934736c88d820fe0098c3c2532549
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedbdf0bf73006ea8af9327cdb85cfdff4c23a5f966Fixed1636d85dc139b07c0449308f2bb5e0c7a2e0da99
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced10dc959398175736e495f71c771f8641e1ca1907Fixedab85765cbe3258b43dc6729af0e6ce3a87a133d8Fixed29bef9934b2521f787bb15dd1985d4c0d12ae02a
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.10.253Fixed5.10.261
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.15.203Fixed5.15.212
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.1.167Fixed6.1.178
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.6.122Fixed6.6.145
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.12.68Fixed6.12.96
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.18.8Fixed6.18.39
Affected versions
v5.*
v5.10.253
v5.10.254
v5.10.255
v5.10.256
v5.10.257
v5.10.258
v5.10.259
v5.10.260
v5.15.203
v5.15.204
v5.15.205
v5.15.206
v5.15.207
v5.15.208
v5.15.209
v5.15.210
v5.15.211
v6.*
v6.1.167
v6.1.168
v6.1.169
v6.1.170
v6.1.171
v6.1.172
v6.1.173
v6.1.174
v6.1.175
v6.1.176
v6.1.177
v6.12.68
v6.12.69
v6.12.70
v6.12.71
v6.12.72
v6.12.73
v6.12.74
v6.12.75
v6.12.76
v6.12.77
v6.12.78
v6.12.79
v6.12.80
v6.12.81
v6.12.82
v6.12.83
v6.12.84
v6.12.85
v6.12.86
v6.12.87
v6.12.88
v6.12.89
v6.12.90
v6.12.91
v6.12.92
v6.12.93
v6.12.94
v6.12.95
v6.18.10
v6.18.11
v6.18.12
v6.18.13
v6.18.14
v6.18.15
v6.18.16
v6.18.17
v6.18.18
v6.18.19
v6.18.20
v6.18.21
v6.18.22
v6.18.23
v6.18.24
v6.18.25
v6.18.26
v6.18.27
v6.18.28
v6.18.29
v6.18.30
v6.18.31
v6.18.32
v6.18.33
v6.18.34
v6.18.35
v6.18.36
v6.18.37
v6.18.38
v6.18.8
v6.18.9
v6.6.122
v6.6.123
v6.6.124
v6.6.125
v6.6.126
v6.6.127
v6.6.128
v6.6.129
v6.6.130
v6.6.131
v6.6.132
v6.6.133
v6.6.134
v6.6.135
v6.6.136
v6.6.137
v6.6.138
v6.6.139
v6.6.140
v6.6.141
v6.6.142
v6.6.143
v6.6.144
Linux / Kernel
Package
- Name
- Kernel
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed5.10.261
- Type
- ECOSYSTEM
- Events
-
Introduced5.11.0Fixed5.15.212
- Type
- ECOSYSTEM
- Events
-
Introduced5.16.0Fixed6.1.178
- Type
- ECOSYSTEM
- Events
-
Introduced6.2.0Fixed6.6.145
- Type
- ECOSYSTEM
- Events
-
Introduced6.7.0Fixed6.12.96
- Type
- ECOSYSTEM
- Events
-
Introduced6.13.0Fixed6.18.39
- Type
- ECOSYSTEM
- Events
-
Introduced6.19.0Fixed7.1.4