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CVE-2024-26861

4.7 · MEDIUM
Published Apr 17, 2024 linux CWE-362 EPSS 0.18% (7th pctl)

Overview

CVE-2024-26861 is a medium-severity vulnerability affecting linux linux_kernel. It was published on April 17, 2024 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. 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:

wireguard: receive: annotate data-race around receiving_counter.counter

Syzkaller with KCSAN identified a data-race issue when accessing

keypair->receiving_counter.counter. Use READ_ONCE() and WRITE_ONCE()

annotations to mark the data race as intentional.

BUG: KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll

write to 0xffff888107765888 of 8 bytes by interrupt on cpu 0:

counter_validate drivers/net/wireguard/receive.c:321 [inline]

wg_packet_rx_poll+0x3ac/0xf00 drivers/net/wireguard/receive.c:461

__napi_poll+0x60/0x3b0 net/core/dev.c:6536

napi_poll net/core/dev.c:6605 [inline]

net_rx_action+0x32b/0x750 net/core/dev.c:6738

__do_softirq+0xc4/0x279 kernel/softirq.c:553

do_softirq+0x5e/0x90 kernel/softirq.c:454

__local_bh_enable_ip+0x64/0x70 kernel/softirq.c:381

__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]

_raw_spin_unlock_bh+

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected Products

Vendor Product Versions Status
linux linux_kernel >= 5.7, < 5.10.214 Affected

References

Ref git.kernel.org/stable/c/3f94da807fe1668b9830f0eefbbf7e887b0a7bc6 Ref git.kernel.org/stable/c/45a83b220c83e3c326513269afbf69ae6fc65cce Ref git.kernel.org/stable/c/78739d72f16b2d7d549f713f1dfebd678d32484b Ref git.kernel.org/stable/c/bba045dc4d996d03dce6fe45726e78a1a1f6d4c3 Ref git.kernel.org/stable/c/d691be84ab898cf136a35176eaf2f8fc116563f0 Ref git.kernel.org/stable/c/f87884e0dffd61b47e58bc6e1e2f6843c212b0cc Ref git.kernel.org/stable/c/fdf16de078a97bf14bb8ee2b8d47cc3d3ead09ed Ref git.kernel.org/stable/c/3f94da807fe1668b9830f0eefbbf7e887b0a7bc6 Ref git.kernel.org/stable/c/45a83b220c83e3c326513269afbf69ae6fc65cce Ref git.kernel.org/stable/c/78739d72f16b2d7d549f713f1dfebd678d32484b

Frequently Asked Questions

What is CVE-2024-26861?

CVE-2024-26861 is a medium-severity vulnerability affecting linux linux_kernel. It was published on April 17, 2024 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

How severe is CVE-2024-26861?

This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-26861?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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-2024-26861?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-26861 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

Autonomous Discovery

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HackBrowser

Browser-based exploitation validates findings with real proof-of-concept.

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