s390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block
In the Linux kernel, the following vulnerability has been resolved: s390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block Unlike kdump, which passes the re-IPL parameter block through os_info, the stand-alone dump passes it through the IPL parm block address and checksum in lowcore. Some IPL types, like HMC FTP boot or QEMU direct kernel boot, might not provide an IPL parameter block. In this case reipl_type_init() selects IPL_TYPE_UNKNOWN and reipl_block_actual remains NULL. Nevertheless, dump_reipl_run() unconditionally dereferences it when preparing the lowcore fields. This may happen to work by chance when address zero contains readable lowcore data. A zero IPL parameter block address is then stored in lowcore, causing the stand-alone dumper to enter disabled wait after completing the dump. Explicitly store a zero IPL parameter block address and checksum when no re-IPL parameter block is available. This does not change the behavior: the stand-alone dumper completes the dump and halts, while valid re-IPL parameter blocks continue to be handled as before.
CVE-2026-98399
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-2026-98399
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": "099b765139929efdcf232f8870804accf8c4cdc5",
"lessThan": "41647864e62b28388ecccc23a82f0e0a091f4ef2",
"versionType": "git"
},
{
"status": "affected",
"version": "099b765139929efdcf232f8870804accf8c4cdc5",
"lessThan": "aed56fa3108b7095e6a048e134981506c056a6cb",
"versionType": "git"
},
{
"status": "affected",
"version": "099b765139929efdcf232f8870804accf8c4cdc5",
"lessThan": "8d7988e8116c3d29d9e02ca9d37ee84577643f2d",
"versionType": "git"
},
{
"status": "affected",
"version": "099b765139929efdcf232f8870804accf8c4cdc5",
"lessThan": "280ff19853440d59e031cd8fe161e81305721262",
"versionType": "git"
},
{
"status": "affected",
"version": "099b765139929efdcf232f8870804accf8c4cdc5",
"lessThan": "37f61b71cbc0caefc01022a19ee56fc2510e2e6e",
"versionType": "git"
}
],
"programFiles": [
"arch/s390/kernel/ipl.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.30"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.30",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/s390/kernel/ipl.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98399
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38466 · Revision 1
- Added to Heist Feed
- Publisher date