medium
5.5
CWE
835
Advisory Published
Updated

CVE-2024-42246: net, sunrpc: Remap EPERM in case of connection failure in xs_tcp_setup_socket

First published: Wed Aug 07 2024(Updated: )

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().

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
Linux kernel>=4.17<6.1.100
Linux kernel>=6.2<6.6.41
Linux kernel>=6.7<6.9.10
Linux Kernel>=4.17<6.1.100
Linux Kernel>=6.2<6.6.41
Linux Kernel>=6.7<6.9.10
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Software Stack<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Virtual Appliance<=ISVG 10.0.2
IBM Security Verify Governance Identity Manager Container<=ISVG 10.0.2
debian/linux<=5.10.223-1
5.10.234-1
6.1.129-1
6.1.128-1
6.12.21-1
6.12.22-1
debian/linux-6.1
6.1.129-1~deb11u1

Remedy

https://git.kernel.org/stable/c/626dfed5fa3bfb41e0dffd796032b555b69f9cde

Remedy

https://git.kernel.org/stable/c/d6c686c01c5f12ff8f7264e0ddf71df6cb0d4414

Remedy

https://git.kernel.org/stable/c/f2431e7db0fe0daccb2f06bb0d23740affcd2fa6

Remedy

https://git.kernel.org/stable/c/f388cfd913a2b96c05339a335f365795db1b36b6

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2024-42246?

    CVE-2024-42246 is classified with a moderate severity level.

  • How do I fix CVE-2024-42246?

    To remediate CVE-2024-42246, upgrade to the specified patched versions of the Linux kernel provided in the release notes.

  • What software versions are affected by CVE-2024-42246?

    CVE-2024-42246 affects Linux kernel versions up to 5.10.223-1 and various other versions listed in the advisory.

  • What is the impact of CVE-2024-42246?

    CVE-2024-42246 can lead to a denial of service due to an infinite loop in the xs_tcp_setup_socket function.

  • Is it necessary to reboot after applying the fix for CVE-2024-42246?

    Yes, a system reboot is typically required after upgrading the kernel to ensure the changes take effect.

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