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CVE-2026-98935

UnknownEPSS 0.18%

Last modified

CVE-2026-98935 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: rtc: dev: zero-initialize struct rtc_wkalrm to prevent information leak The struct rtc_wkalrm has padding holes after the 'pending' member. When returned to userspace via the RTC_WKALRM_RD ioctl, uninitialized kernel stack data residing in these holes may be leaked. Zero-initialize the struct at declaration to eliminate this information leak risk. Fixes smatch warnings: - drivers/rtc/dev.c:392 rtc_dev_ioctl() warn: check that 'alarm' doesn't leak information (struct has a hole after 'pending'). EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: rtc: dev: zero-initialize struct rtc_wkalrm to prevent information leak The struct rtc_wkalrm has padding holes after the 'pending' member. When returned to userspace via the RTC_WKALRM_RD ioctl, uninitialized kernel stack data residing in these holes may be leaked. Zero-initialize the struct at declaration to eliminate this information leak risk. Fixes smatch warnings: - drivers/rtc/dev.c:392 rtc_dev_ioctl() warn: check that 'alarm' doesn't leak information (struct has a hole after 'pending')

Metrics

EPSS Probability
0.18%

7.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62, < f84eb9b7b0feeb267a174237d70a857042ce0158; >= 36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62, < a2215eb3cbbd3d9d73cc18c08e3ef53f903443cb; >= 36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62, < beda3c9730ad3087d01aa1d0415c40942042ec87; >= 36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62, < 00dc50cede96738dadc64b20e671186cddb8a58d; >= 36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62, < 2838d7bbb551861c25187dfb581ed6e7a56762e9; >= 36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62, < 0ee5c5d804d592a8328a425b9274487d393d3a05
LinuxLinux5.0

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98935?
In the Linux kernel, the following vulnerability has been resolved: rtc: dev: zero-initialize struct rtc_wkalrm to prevent information leak The struct rtc_wkalrm has padding holes after the 'pending' member. When returned to userspace via the RTC_WKALRM_RD ioctl, uninitialized kernel stack data residing in these holes may be leaked. Zero-initialize the struct at declaration to eliminate this information leak risk. Fixes smatch warnings: - drivers/rtc/dev.c:392 rtc_dev_ioctl() warn: check that 'alarm' doesn't leak information (struct has a hole after 'pending')
How severe is CVE-2026-98935?
Severity scoring for CVE-2026-98935 is pending analysis. The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-98935?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST