Vulnerability in Linux

[ Description ]Official 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')

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• git.kernel.org/stable/c/00dc50cede96738dadc64b20e671186cddb8a58d
• git.kernel.org/stable/c/0ee5c5d804d592a8328a425b9274487d393d3a05
• git.kernel.org/stable/c/2838d7bbb551861c25187dfb581ed6e7a56762e9
• git.kernel.org/stable/c/a2215eb3cbbd3d9d73cc18c08e3ef53f903443cb
• git.kernel.org/stable/c/beda3c9730ad3087d01aa1d0415c40942042ec87