of: reserved_mem: prevent OOB when too many dynamic regions are defined
In the Linux kernel, the following vulnerability has been resolved: of: reserved_mem: prevent OOB when too many dynamic regions are defined On boot, fdt_scan_reserved_mem() saves each dynamically-placed /reserved-memory subnode into a local array of size MAX_RESERVED_REGIONS. If the device tree defines more than MAX_RESERVED_REGIONS dynamically-placed regions, fdt_scan_reserved_mem() writes past the end of the local array. Add a bounds check that logs an error and skips the excess regions, restoring the original behavior.
CVE-2026-80723
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-2026-80723
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": "9a0fe62f93ede02c27aaca81112af1e59c8c0979",
"lessThan": "68d27250c9e81ab7764603e346c2b1017cb53adf",
"versionType": "git"
},
{
"status": "affected",
"version": "8a6e02d0c00e7b62e6acb74146878bb91e9e7e31",
"lessThan": "cfa7e2734877330d6c10e0f33953905486c4530c",
"versionType": "git"
},
{
"status": "affected",
"version": "8a6e02d0c00e7b62e6acb74146878bb91e9e7e31",
"lessThan": "de8ccbd6bf4efe7a059e2c483789936009e10f42",
"versionType": "git"
},
{
"status": "affected",
"version": "8a6e02d0c00e7b62e6acb74146878bb91e9e7e31",
"lessThan": "db3dbdfea1b8f38774419c5c2c14e4b81c48708d",
"versionType": "git"
},
{
"status": "affected",
"version": "6.12.13",
"lessThan": "6.12.103",
"versionType": "semver"
}
],
"programFiles": [
"drivers/of/of_reserved_mem.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/of/of_reserved_mem.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80723
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34370 · Revision 1
- Added to Heist Feed
- Publisher date