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CVE-2026-74435

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: rxrpc: rxrpc_verify_data ensure rx_dec_buffer alloc rxrpc_recvmsg_data() calls rxrpc_verify_data() whenever the rxrpc_call.rx_d…

Published Aug 15, 2026EPSS 0.63%

Overview

CVE-2026-74435 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

rxrpc: rxrpc_verify_data ensure rx_dec_buffer alloc

rxrpc_recvmsg_data() calls rxrpc_verify_data() whenever the

rxrpc_call.rx_dec_buffer is unallocated and assumes that upon

successful return that rx_dec_buffer must be allocated.

However, rxrpc_verify_data() does not request an allocation if

the rxrpc_skb_priv.len is zero.

In addition, failure to allocate rx_dec_buffer will result in a

call to skb_copy_bits() with a NULL destination which can

trigger a NULL pointer dereference.

To prevent these issues rxrpc_verify_data() is modified to

always attempt to allocate the rxrpc_call.rx_dec_buffer if it

is NULL.

This issue was identified with assistance of a private

sashiko instance.

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/16c8ae9735c5bd7e54dd7478d6348e0fc860842dRefgit.kernel.org/stable/c/6563b4eb38c35d75892445bcf8aacdc29914821cRefgit.kernel.org/stable/c/8bbede0afced346b24e4fbde0c68cf12980ba948Refgit.kernel.org/stable/c/a962bc8508592c4d51092edac68579bd8b18fe44Refgit.kernel.org/stable/c/d3b642cf95d48234590cc91450d8705a9bf6b540

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74435?

CVE-2026-74435 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-74435?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-74435?

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-2026-74435?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74435 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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