rtc: dev: zero-initialize struct rtc_wkalrm to prevent information leak
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')
CVE-2026-98935
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98935
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62",
"lessThan": "a2215eb3cbbd3d9d73cc18c08e3ef53f903443cb",
"versionType": "git"
},
{
"status": "affected",
"version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62",
"lessThan": "beda3c9730ad3087d01aa1d0415c40942042ec87",
"versionType": "git"
},
{
"status": "affected",
"version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62",
"lessThan": "00dc50cede96738dadc64b20e671186cddb8a58d",
"versionType": "git"
},
{
"status": "affected",
"version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62",
"lessThan": "2838d7bbb551861c25187dfb581ed6e7a56762e9",
"versionType": "git"
},
{
"status": "affected",
"version": "36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62",
"lessThan": "0ee5c5d804d592a8328a425b9274487d393d3a05",
"versionType": "git"
}
],
"programFiles": [
"drivers/rtc/dev.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/rtc/dev.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98935
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #52793 · Revision 1
- Added to Heist Feed
- Publisher date