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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-99160: ring-buffer: Do not show buffer_meta for CPUs without a buffer

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
  • Fixed version: Linux Linux 3f23cae09a4677a3f7c163a68388512cb231ff22, 445bc0e0ed7b3f69b78a0fd8d3a8fdb4e20bc379, 8512d0312cc0ea83ca4511b164c29a138bbb0c21.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 3f23cae09a4677a3f7c163a68388512cb231ff22, 445bc0e0ed7b3f69b78a0fd8d3a8fdb4e20bc379, 8512d0312cc0ea83ca4511b164c29a138bbb0c21 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Do not show buffer_meta for CPUs without a buffer The per_cpu/cpuN/buffer_meta files are created for every possible CPU, but buffer->buffers[cpu] is only allocated once that CPU comes online. Reading the file of a CPU that never came online dereferences a NULL cpu_buffer in rbm_start(). Fail the open with -ENODEV when the CPU has no buffer, as the other per CPU ring buffer interfaces do.

—No exploit Fix available
Published
Oct 28, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 6.12affected
    • 950032ffcee7a43c960951940059afc5a2bdbcbc and later · before 445bc0e0ed7b3f69b78a0fd8d3a8fdb4e20bc379affected · git
    • 950032ffcee7a43c960951940059afc5a2bdbcbc and later · before 8512d0312cc0ea83ca4511b164c29a138bbb0c21affected · git
    • 950032ffcee7a43c960951940059afc5a2bdbcbc and later · before ae670c1a24fb5ffb167f26358cf47a5f0abbd670affected · git
    • 950032ffcee7a43c960951940059afc5a2bdbcbc and later · before 3f23cae09a4677a3f7c163a68388512cb231ff22affected · git
    • before 6.12not affected · semver
    • 6.12.115 and later · up to and including 6.12.*not affected · semver
    • 6.18.59 and later · up to and including 6.18.*not affected · semver
    • 7.2.13 and later · up to and including 7.2.*not affected · semver
    • 7.3 and laternot affected · original_commit_for_fix

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:13linuxbefore 6.12.115-26.12.115-2
Debian:14linuxfrom 0—

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-99158Oct 28, 2026 · ring-buffer: Fix false warning in ring_buffer_map_get_reader()
    0Monitor
  • ← EarlierCVE-2026-99159Oct 28, 2026 · ring-buffer: Fix the sub-buffer array base in rb_meta_subbuf_idx()
    0Monitor
  • Later →CVE-2026-99161Oct 28, 2026 · i2c: viai2c-wmt: Fix clock leak in wmt_i2c_probe()
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux3f23cae09a4677a3f7c163a68388512cb231ff22Vendor (CNA)
Linux Linux445bc0e0ed7b3f69b78a0fd8d3a8fdb4e20bc379Vendor (CNA)
Linux Linux8512d0312cc0ea83ca4511b164c29a138bbb0c21Vendor (CNA)
Linux Linuxae670c1a24fb5ffb167f26358cf47a5f0abbd670Vendor (CNA)
debian:linux6.12.115-2 · Debian:13Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 5, 2026+8 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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