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CVE-2024-50035

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ppp: fix ppp_async_encode() illegal access syzbot reported an issue in ppp_async_encode() [1] In this case, pppoe_sendmsg() is…

Published Oct 21, 2024CWE-908EPSS 0.27%

Overview

CVE-2024-50035 is a high-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

ppp: fix ppp_async_encode() illegal access

syzbot reported an issue in ppp_async_encode() [1]

In this case, pppoe_sendmsg() is called with a zero size.

Then ppp_async_encode() is called with an empty skb.

BUG: KMSAN: uninit-value in ppp_async_encode drivers/net/ppp/ppp_async.c:545 [inline]

BUG: KMSAN: uninit-value in ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675

ppp_async_encode drivers/net/ppp/ppp_async.c:545 [inline]

ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675

ppp_async_send+0x130/0x1b0 drivers/net/ppp/ppp_async.c:634

ppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2280 [inline]

ppp_input+0x1f1/0xe60 drivers/net/ppp/ppp_generic.c:2304

pppoe_rcv_core+0x1d3/0x720 drivers/net/ppp/pppoe.c:379

sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1113

__release_sock+0x1da/0x330 net/core/sock.c:3072

release_sock+0x6b/0x250 net/core/sock.c:3626

pppoe_sendmsg+0x2b8/0xb90

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/30d91a478d58cbae3dbaa8224d17d0d839f0d71bRefgit.kernel.org/stable/c/40dddd4b8bd08a69471efd96107a4e1c73fabefcRefgit.kernel.org/stable/c/4151ec65abd755133ebec687218fadd2d2631167Refgit.kernel.org/stable/c/8dfe93901b410ae41264087427f3b9f389388f83Refgit.kernel.org/stable/c/8fe992ff3df493d1949922ca234419f3ede08dffRefgit.kernel.org/stable/c/c007a14797240607038bd3464501109f408940e2Refgit.kernel.org/stable/c/ce249a4c68d0ce27a8c5d853338d502e2711a314Refgit.kernel.org/stable/c/fadf8fdb3110d3138e05c3765f645535434f8d76Reflists.debian.org/debian-lts-announce/2025/01/msg00001.htmlReflists.debian.org/debian-lts-announce/2025/03/msg00002.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-50035?

CVE-2024-50035 is a high-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2024-50035?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-50035?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-50035?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-50035 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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