UnratedFix available
ring-buffer: Add checking nr_subbufs to persistent ring buffer validation
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.12.111, 6.18.57, 7.2.7
- CVEs
- CVE-2026-98057
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 02:35 UTC · Revision 1
Source evidence
ring-buffer: Add checking nr_subbufs to persistent ring buffer validation
core-osv · Original sourcePublished 25 Sept 2026, 10:24 UTC
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.
osv:CVE-2026-98057
Kernel
Fixed versions: 6.12.111, 6.18.57, 7.2.7
Complete source record
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"title": "ring-buffer: Add checking nr_subbufs to persistent ring buffer validation",
"summary": "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.",
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"modified": "2026-10-28T02:30:32.626944250Z",
"provider": "osv",
"references": [
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"https://git.kernel.org/stable/c/69d502457e3f76142f7fcf6e2625e80e0ce8a60f",
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"https://nvd.nist.gov/vuln/detail/CVE-2026-98057",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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"related_cves": [
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"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 499729,
"published_at": "2026-09-25T10:24:03.541+00:00"
}