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CVE-2026-72025

UnknownEPSS 0.21%

Last modified

CVE-2026-72025 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: s390/monwriter: Reject buffer reuse with different data length When data buffers are reused, e.g. for interval sample records, the first record determines the data length, and the size of the buffer for user copy. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: s390/monwriter: Reject buffer reuse with different data length When data buffers are reused, e.g. for interval sample records, the first record determines the data length, and the size of the buffer for user copy. Current monwriter code does not check if the data length was changed for subsequent records, which also would never happen for valid user programs. However, a malicious user could change the data length, resulting in out of bounds user copy to the kernel buffer, and memory corruption. By default, the monwriter misc device is created with root-only permissions, so practical impact is typically low. Fix this by checking for changed data length and rejecting such records.

Metrics

EPSS Probability
0.21%

11.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 31b58088292c7f00f0b81088bfb557285b0b6247, < 096dff1247037d329c04b3a5be0ecdfb1c5c7ac6; >= 31b58088292c7f00f0b81088bfb557285b0b6247, < d39cf4a6d721b1ae21eb53bbf3e8cd984253d7ab; >= 31b58088292c7f00f0b81088bfb557285b0b6247, < 759d91378203ea35fa9bca6726dcf0010de081fb; >= 31b58088292c7f00f0b81088bfb557285b0b6247, < 036bc5661060702e798d215e81bb46da530965b3; >= 31b58088292c7f00f0b81088bfb557285b0b6247, < 01f3ce411711c2c919598ea25320a5a48f71edbc; >= 31b58088292c7f00f0b81088bfb557285b0b6247, < f0745496f7c171271cafd9457df3b914a483ddeb; >= 31b58088292c7f00f0b81088bfb557285b0b6247, < ae5347f3db1782c6118f6cc0d9fd8b1d43397db3; >= 31b58088292c7f00f0b81088bfb557285b0b6247, < 2995ccec260caa9e85b3301a4aba1e66ed80ad74
LinuxLinux2.6.19

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-72025?
In the Linux kernel, the following vulnerability has been resolved: s390/monwriter: Reject buffer reuse with different data length When data buffers are reused, e.g. for interval sample records, the first record determines the data length, and the size of the buffer for user copy. Current monwriter code does not check if the data length was changed for subsequent records, which also would never happen for valid user programs. However, a malicious user could change the data length, resulting in out of bounds user copy to the kernel buffer, and memory corruption. By default, the monwriter misc device is created with root-only permissions, so practical impact is typically low. Fix this by checking for changed data length and rejecting such records.
How severe is CVE-2026-72025?
Severity scoring for CVE-2026-72025 is pending analysis. The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2026-72025?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST