s390/monwriter: Reject buffer reuse with different data length
Summary
| CVE | CVE-2026-72025 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 06:21:01 UTC |
| Updated | 2026-08-18 07:16:52 UTC |
| 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. |
Risk And Classification
EPSS: 0.002100000 probability, percentile 0.115410000 (date 2026-08-17)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 31b58088292c7f00f0b81088bfb557285b0b6247 096dff1247037d329c04b3a5be0ecdfb1c5c7ac6 git | Not specified |
| CNA | Linux | Linux | affected 31b58088292c7f00f0b81088bfb557285b0b6247 d39cf4a6d721b1ae21eb53bbf3e8cd984253d7ab git | Not specified |
| CNA | Linux | Linux | affected 31b58088292c7f00f0b81088bfb557285b0b6247 759d91378203ea35fa9bca6726dcf0010de081fb git | Not specified |
| CNA | Linux | Linux | affected 31b58088292c7f00f0b81088bfb557285b0b6247 036bc5661060702e798d215e81bb46da530965b3 git | Not specified |
| CNA | Linux | Linux | affected 31b58088292c7f00f0b81088bfb557285b0b6247 01f3ce411711c2c919598ea25320a5a48f71edbc git | Not specified |
| CNA | Linux | Linux | affected 31b58088292c7f00f0b81088bfb557285b0b6247 f0745496f7c171271cafd9457df3b914a483ddeb git | Not specified |
| CNA | Linux | Linux | affected 31b58088292c7f00f0b81088bfb557285b0b6247 ae5347f3db1782c6118f6cc0d9fd8b1d43397db3 git | Not specified |
| CNA | Linux | Linux | affected 31b58088292c7f00f0b81088bfb557285b0b6247 2995ccec260caa9e85b3301a4aba1e66ed80ad74 git | Not specified |
| CNA | Linux | Linux | affected 2.6.19 | Not specified |
| CNA | Linux | Linux | unaffected 2.6.19 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.261 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.212 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.97 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.40 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/096dff1247037d329c04b3a5be0ecdfb1c5c7ac6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ae5347f3db1782c6118f6cc0d9fd8b1d43397db3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/036bc5661060702e798d215e81bb46da530965b3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/2995ccec260caa9e85b3301a4aba1e66ed80ad74 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/01f3ce411711c2c919598ea25320a5a48f71edbc | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d39cf4a6d721b1ae21eb53bbf3e8cd984253d7ab | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/759d91378203ea35fa9bca6726dcf0010de081fb | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f0745496f7c171271cafd9457df3b914a483ddeb | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.