ring-buffer: Add checking nr_subbufs to persistent ring buffer validation
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Add checking nr_subbufs to persistent ring buffer validation Sashiko reported that the code was using meta->nr_subbufs without making sure that it matched the nr_pages + 1 on data that was assuming the two were the same. Add a check to the persistent ring buffer validation code to make sure that the saved nr_subbufs matches what we expect.
CVE-2026-98057
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-2026-98057
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": "3ec743d558f111d8999aea24577ba66c65ee2eeb",
"lessThan": "f0467190e6a9fc61e343c8064ef16aad513788c3",
"versionType": "git"
},
{
"status": "affected",
"version": "f5b95f1fa2ef3a03f49eeec658ba97e721412b32",
"lessThan": "364a31052aa9ef91db137f82d797366007cd85b7",
"versionType": "git"
},
{
"status": "affected",
"version": "f5b95f1fa2ef3a03f49eeec658ba97e721412b32",
"lessThan": "69d502457e3f76142f7fcf6e2625e80e0ce8a60f",
"versionType": "git"
},
{
"status": "affected",
"version": "f5b95f1fa2ef3a03f49eeec658ba97e721412b32",
"lessThan": "6c001a62c34f13fe1c6a24304c289b387d9e697d",
"versionType": "git"
},
{
"status": "affected",
"version": "0d547a6f5e8fad26ebc12f501d7d19fccdbad6bf",
"versionType": "git"
},
{
"status": "affected",
"version": "6.12.16",
"lessThan": "6.12.111",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.13.4",
"lessThan": "6.14",
"versionType": "semver"
}
],
"programFiles": [
"kernel/trace/ring_buffer.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"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": [
"kernel/trace/ring_buffer.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98057
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38170 · Revision 1
- Added to Heist Feed
- Publisher date