4.7

CVE-2022-49641

sysctl: Fix data races in proc_douintvec().

In the Linux kernel, the following vulnerability has been resolved:

sysctl: Fix data races in proc_douintvec().

A sysctl variable is accessed concurrently, and there is always a chance
of data-race.  So, all readers and writers need some basic protection to
avoid load/store-tearing.

This patch changes proc_douintvec() to use READ_ONCE() and WRITE_ONCE()
internally to fix data-races on the sysctl side.  For now, proc_douintvec()
itself is tolerant to a data-race, but we still need to add annotations on
the other subsystem's side.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.4.24 < 4.5
Linux ≫ Linux Kernel Version >= 4.7.7 < 5.10.132
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.56
Linux ≫ Linux Kernel Version >= 5.16 < 5.18.13
Linux ≫ Linux Kernel Version5.19 Updaterc1
Linux ≫ Linux Kernel Version5.19 Updaterc2
Linux ≫ Linux Kernel Version5.19 Updaterc3
Linux ≫ Linux Kernel Version5.19 Updaterc4
Linux ≫ Linux Kernel Version5.19 Updaterc5
Linux ≫ Linux Kernel Version5.19 Updaterc6
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.17% 0.063
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 4.7 1 3.6
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
134c704f-9b21-4f2e-91b3-4a467353bcc0 4.7 1 3.6
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

https://git.kernel.org/stable/c/4762b532ec9539755aab61445d5da6e1926ccb99
Patch
https://git.kernel.org/stable/c/630c76850d554d7140232e71b5d1663e88cffb54
Patch
https://git.kernel.org/stable/c/d335db59f7fb3353f56e52371f1ee796ae9c8f09
Patch
https://git.kernel.org/stable/c/d5d54714e329f646bd7af4994fc427d88ee68936
Patch