Is CVE-2026-64545 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-64545 being exploited in the wild.

How severe is CVE-2026-64545?

Informational severity, with a CVSS score of 6.2, published 27 July 2026.

Which products and versions are affected?

Linux Kernel 879af96ffd72 to e82d8cc4321c.

Is there a fix for CVE-2026-64545?

A patch was published on 2026-07-24: Commits merged into stable branches Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-64545 attacked?

It is attacked over the network, in an operating system.

Am I affected by CVE-2026-64545?

Check whether you run Linux Kernel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-64545: Linux Kernel NULL pointer dereference in xdp_master_redirect

CVE-2026-64545 · Severity: info · CVSS 6.2 · Published 2026-07-27

A vulnerability in the Linux kernel's networking component could allow a remote attacker to cause a system crash (kernel panic). This occurs when specific network traffic is processed while a network interface is being disconnected from a 'bonded' group. This issue primarily impacts system availability and could lead to service outages.

Technologies: Linux Kernel. Vendors: Linux.

Quick answers

Is CVE-2026-64545 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-64545 being exploited in the wild.
How severe is CVE-2026-64545?: Informational severity, with a CVSS score of 6.2, published 27 July 2026.
Which products and versions are affected?: Linux Kernel 879af96ffd72 to e82d8cc4321c.
Is there a fix for CVE-2026-64545?: A patch was published on 2026-07-24: Commits merged into stable branches Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-64545 attacked?: It is attacked over the network, in an operating system.
Am I affected by CVE-2026-64545?: Check whether you run Linux Kernel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A NULL pointer dereference exists in net/core/filter.c within the xdp_master_redirect() function. The vulnerability is caused by a race condition during the release of a bond slave; bond_upper_dev_unlink() removes the upper-master adjacency before the IFF_SLAVE flag is cleared. If an XDP_TX event occurs during this window, xdp_master_redirect() attempts to dereference the 'master' pointer returned by netdev_master_upper_dev_get_rcu() without a NULL check. This results in a kernel panic when the code attempts to read master->flags. The fix introduces a NULL check for the master device before dereferencing.

Affected products

Linux Linux Kernel 879af96ffd72 to e82d8cc4321c

Timeline

2026-06-20: disclosed: Initial patch submitted by Xiang Mei
2026-07-24: patched: Commits merged into stable branches
2026-07-27: advisory: CVE-2026-64545 published

References

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