Is CVE-2026-64502 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-64502 being exploited in the wild.

How severe is CVE-2026-64502?

Informational severity, with a CVSS score of 7.8, published 25 July 2026.

Which products and versions are affected?

Linux Kernel 132d44dc6966 to 3394e0b33284, 3bceb26dfaf7, 91bc6767a4f5.

Is there a fix for CVE-2026-64502?

A patch was published on 2026-07-18: Patch committed to stable tree Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-64502 attacked?

It is attacked with local access, in an operating system.

Am I affected by CVE-2026-64502?

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-2026-64502: Linux Kernel heap overflow in ad_sigma_delta ADC driver

CVE-2026-64502 · Severity: info · CVSS 7.8 · Published 2026-07-25

A vulnerability in the Linux kernel's Analog Devices Sigma-Delta ADC driver could allow a local attacker to cause a system crash or potentially execute unauthorized code. The issue occurs when the system attempts to clear pending events on certain hardware configurations, leading to memory corruption. This affects industrial and scientific equipment using specific Analog-to-Digital converters managed by this driver.

Technologies: Linux Kernel. Vendors: Linux.

Quick answers

Is CVE-2026-64502 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-64502 being exploited in the wild.
How severe is CVE-2026-64502?: Informational severity, with a CVSS score of 7.8, published 25 July 2026.
Which products and versions are affected?: Linux Kernel 132d44dc6966 to 3394e0b33284, 3bceb26dfaf7, 91bc6767a4f5.
Is there a fix for CVE-2026-64502?: A patch was published on 2026-07-18: Patch committed to stable tree Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-64502 attacked?: It is attacked with local access, in an operating system.
Am I affected by CVE-2026-64502?: 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 heap overflow exists in the ad_sigma_delta_clear_pending_event() function within the Linux kernel's IIO ADC subsystem (drivers/iio/adc/ad_sigma_delta.c). For devices where has_registers is false and no rdy_gpiod is present, or when num_resetclks is 0, the driver incorrectly falls through to a status register read path. This results in an integer underflow when calculating the length for a memset operation (memset(data + 2, 0xff, 0 - 1)), causing a buffer overflow of SIZE_MAX bytes. An attacker with local access could exploit this to corrupt kernel heap memory, leading to a Denial of Service (DoS) or potential privilege escalation. The issue has been patched by adding explicit guards for registerless devices and zero-length data reads.

Affected products

Linux Linux Kernel 132d44dc6966 to 3394e0b33284, 3bceb26dfaf7, 91bc6767a4f5

Timeline

2026-05-27: other: Patch authored
2026-07-18: patched: Patch committed to stable tree
2026-07-25: disclosed: CVE published

References

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