fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod()
In the Linux kernel, the following vulnerability has been resolved: fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod() In fb_find_mode_cvt(), iff mode->refresh somehow happens to be 0x80000000, cvt.f_refresh will become 0 when multiplying it by 2 due to overflow. It's then passed to fb_cvt_hperiod(), where it's used as a divider -- division by 0 will result in kernel oops. Add a sanity check for cvt.f_refresh to avoid such overflow... Found by Linux Verification Center (linuxtesting.org) with the Svace static analysis tool.
CVE-2025-38312
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-2025-38312
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": "96fe6a2109db29cd15b90a093c16e6cb4b19371a",
"lessThan": "9027ce4c037b566b658b8939a76326b7125e3627",
"versionType": "git"
},
{
"status": "affected",
"version": "96fe6a2109db29cd15b90a093c16e6cb4b19371a",
"lessThan": "610f247f2772e4f92b63442125a1b7ade79898d8",
"versionType": "git"
},
{
"status": "affected",
"version": "96fe6a2109db29cd15b90a093c16e6cb4b19371a",
"lessThan": "2d63433e8eaa3c91b2948190e395bc67009db0d9",
"versionType": "git"
},
{
"status": "affected",
"version": "96fe6a2109db29cd15b90a093c16e6cb4b19371a",
"lessThan": "54947530663edcbaaee1314c01fdd8c72861b124",
"versionType": "git"
},
{
"status": "affected",
"version": "96fe6a2109db29cd15b90a093c16e6cb4b19371a",
"lessThan": "ab91647acdf43b984824776559a452212eaeb21a",
"versionType": "git"
},
{
"status": "affected",
"version": "96fe6a2109db29cd15b90a093c16e6cb4b19371a",
"lessThan": "b235393b9f43ff86a38ca2bde6372312ea215dc5",
"versionType": "git"
},
{
"status": "affected",
"version": "96fe6a2109db29cd15b90a093c16e6cb4b19371a",
"lessThan": "53784073cbad18f75583fd3da9ffdfc4d1f05405",
"versionType": "git"
},
{
"status": "affected",
"version": "96fe6a2109db29cd15b90a093c16e6cb4b19371a",
"lessThan": "3f6dae09fc8c306eb70fdfef70726e1f154e173a",
"versionType": "git"
}
],
"programFiles": [
"drivers/video/fbdev/core/fbcvt.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.295",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.239",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.186",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.142",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.94",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.34",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.3",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/video/fbdev/core/fbcvt.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38312
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #27031 · Revision 1
- Added to Heist Feed
- Publisher date