CVE-2024-42246

In the Linux kernel, the following vulnerability has been resolved: net, sunrpc: Remap EPERM in case of connection failure in xs_tcp_setup_socket When using a BPF program on kernel_connect(), the call can return -EPERM. This causes xs_tcp_setup_socket() to loop forever, filling up the syslog and causing the kernel to potentially freeze up. Neil suggested: This will propagate -EPERM up into other layers which might not be ready to handle it. It might be safer to map EPERM to an error we would be more likely to expect from the network system - such as ECONNREFUSED or ENETDOWN. ECONNREFUSED as error seems reasonable. For programs setting a different error can be out of reach (see handling in 4fbac77d2d09) in particular on kernels which do not have f10d05966196 ("bpf: Make BPF_PROG_RUN_ARRAY return -err instead of allow boolean"), thus given that it is better to simply remap for consistent behavior. UDP does handle EPERM in xs_udp_send_request().

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/02ee1976edb21a96ce8e3fd4ef563f14cc16d041
https://git.kernel.org/stable/c/5d8254e012996cee1a0f9cc920531cb7e4d9a011
https://git.kernel.org/stable/c/626dfed5fa3bfb41e0dffd796032b555b69f9cde	Patch
https://git.kernel.org/stable/c/934247ea65bc5eca8bdb7f8c0ddc15cef992a5d6
https://git.kernel.org/stable/c/bc790261218952635f846aaf90bcc0974f6f62c6
https://git.kernel.org/stable/c/d6c686c01c5f12ff8f7264e0ddf71df6cb0d4414	Patch
https://git.kernel.org/stable/c/f2431e7db0fe0daccb2f06bb0d23740affcd2fa6	Patch
https://git.kernel.org/stable/c/f388cfd913a2b96c05339a335f365795db1b36b6	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2024-08-07 16:15

Updated : 2024-09-12 12:15

NVD link : CVE-2024-42246

Mitre link : CVE-2024-42246

CVE.ORG link : CVE-2024-42246

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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