powerpc/kexec_file: Fix null-ptr-def in extra size calculation
In the Linux kernel, the following vulnerability has been resolved: powerpc/kexec_file: Fix null-ptr-def in extra size calculation A static Sashiko AI review identified a potential NULL pointer dereference in kexec_extra_fdt_size_ppc64(). On platforms without any reserved memory regions, get_reserved_memory_ranges() can return 0 while leaving 'rmem' unallocated as NULL. Passing it directly leads to a kernel panic when evaluating 'rmem->nr_ranges'. Add a NULL check for 'rmem' to prevent this crash.
CVE-2026-89963
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-2026-89963
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": "0d3ff067331ef84e7e7f49537d768881042ed5ba",
"lessThan": "11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf",
"versionType": "git"
},
{
"status": "affected",
"version": "0d3ff067331ef84e7e7f49537d768881042ed5ba",
"lessThan": "df45337587db21c502fe5251d3bcc7887428f4fb",
"versionType": "git"
},
{
"status": "affected",
"version": "0d3ff067331ef84e7e7f49537d768881042ed5ba",
"lessThan": "4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea",
"versionType": "git"
},
{
"status": "affected",
"version": "0d3ff067331ef84e7e7f49537d768881042ed5ba",
"lessThan": "761eda315a6e1fda3e8e2185b28430771fb1ac29",
"versionType": "git"
}
],
"programFiles": [
"arch/powerpc/kexec/file_load_64.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/powerpc/kexec/file_load_64.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89963
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36402 · Revision 1
- Added to Heist Feed
- Publisher date