4.7

CVE-2024-49864

rxrpc: Fix a race between socket set up and I/O thread creation

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

rxrpc: Fix a race between socket set up and I/O thread creation

In rxrpc_open_socket(), it sets up the socket and then sets up the I/O
thread that will handle it.  This is a problem, however, as there's a gap
between the two phases in which a packet may come into rxrpc_encap_rcv()
from the UDP packet but we oops when trying to wake the not-yet created I/O
thread.

As a quick fix, just make rxrpc_encap_rcv() discard the packet if there's
no I/O thread yet.

A better, but more intrusive fix would perhaps be to rearrange things such
that the socket creation is done by the I/O thread.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.2 <= 6.6.55
Linux ≫ Linux Kernel Version >= 6.10 < 6.10.14
Linux ≫ Linux Kernel Version >= 6.11 < 6.11.3
Linux ≫ Linux Kernel Version6.12 Updaterc1
Linux ≫ Linux Kernel Version6.12 Updaterc2
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.17% 0.068
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
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/56e415202b8a17de6496f4023e545fcb66f118ec
Patch
https://git.kernel.org/stable/c/bc212465326e8587325f520a052346f0b57360e6
Patch
https://git.kernel.org/stable/c/c64f5fc95e9612fdf75587c8e21e494e614c18e2
Patch
https://git.kernel.org/stable/c/cdf4bbbdb956d7426f687f38757ebca2a2759a0f
Patch