dibs: loopback: validate offset and size in move_data()
In the Linux kernel, the following vulnerability has been resolved: dibs: loopback: validate offset and size in move_data() The loopback move_data() performs a memcpy into the registered DMB without checking whether offset + size exceeds the DMB length. Unlike real ISM hardware, which enforces memory region bounds natively, the software loopback has no such protection. A peer-supplied out-of-bounds offset or oversized write would result in an OOB write past the allocated kernel buffer. Add an explicit bounds check before the memcpy to reject such requests with -EINVAL.
CVE-2026-72018
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-2026-72018
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": "f7a22071dbf316c982fb44308874bd7ad9ac2091",
"lessThan": "ee188a6b264b71315a67f1b9470faad308b730d2",
"versionType": "git"
},
{
"status": "affected",
"version": "f7a22071dbf316c982fb44308874bd7ad9ac2091",
"lessThan": "b2f426a9a22886071966432ede8fceafffe12b8c",
"versionType": "git"
},
{
"status": "affected",
"version": "f7a22071dbf316c982fb44308874bd7ad9ac2091",
"lessThan": "94fe0ab01b480b52bd8f977edbd845ef375d69fd",
"versionType": "git"
},
{
"status": "affected",
"version": "f7a22071dbf316c982fb44308874bd7ad9ac2091",
"lessThan": "78237e3c0720fcc6eb9b87e90fd70f63eeca886f",
"versionType": "git"
}
],
"programFiles": [
"drivers/dibs/dibs_loopback.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/dibs/dibs_loopback.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72018
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #32939 · Revision 1
- Added to Heist Feed
- Publisher date