Linux Kernel up to 6.12.110/7.2.6/7.3-rc1 Persistent Ring Buffer nr_subbufs buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$5k-$25k0.00+

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.12.110/7.2.6/7.3-rc1. It has been declared as very critical. This impacts an unknown function of the component Persistent Ring Buffer. Such manipulation of the argument nr_subbufs leads to buffer overflow. This vulnerability is documented as CVE-2026-98057. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Linux Kernel up to 6.12.110/7.2.6/7.3-rc1. Affected by this issue is some unknown processing of the component Persistent Ring Buffer. The manipulation of the argument nr_subbufs with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-98057 since 09/25/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 09/25/2026).

Upgrading to version 6.12.111, 7.2.7 or 7.3-rc2 eliminates this vulnerability. Applying the patch f0467190e6a9fc61e343c8064ef16aad513788c3/69d502457e3f76142f7fcf6e2625e80e0ce8a60f/6c001a62c34f13fe1c6a24304c289b387d9e697d is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

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Vendor

Name

Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.111/7.2.7/7.3-rc2
Patch: f0467190e6a9fc61e343c8064ef16aad513788c3/69d502457e3f76142f7fcf6e2625e80e0ce8a60f/6c001a62c34f13fe1c6a24304c289b387d9e697d

Timelineinfo

09/25/2026 Advisory disclosed
09/25/2026 +0 days CVE reserved
09/25/2026 +0 days VulDB entry created
09/25/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-98057 (🔒)
GCVE (CVE): GCVE-0-2026-98057
GCVE (VulDB): GCVE-100-410276

Entryinfo

Created: 09/25/2026 16:21
Changes: 09/25/2026 16:21 (59)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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