{"api_version":"1","generated_at":"2026-08-18T11:34:23+00:00","cve":"CVE-2026-72025","urls":{"html":"https://cve.report/CVE-2026-72025","api":"https://cve.report/api/cve/CVE-2026-72025.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72025","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72025"},"summary":{"title":"s390/monwriter: Reject buffer reuse with different data length","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/monwriter: Reject buffer reuse with different data length\n\nWhen data buffers are reused, e.g. for interval sample records, the\nfirst record determines the data length, and the size of the buffer for\nuser copy. Current monwriter code does not check if the data length was\nchanged for subsequent records, which also would never happen for valid\nuser programs.\n\nHowever, a malicious user could change the data length, resulting in out\nof bounds user copy to the kernel buffer, and memory corruption. By\ndefault, the monwriter misc device is created with root-only permissions,\nso practical impact is typically low.\n\nFix this by checking for changed data length and rejecting such records.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:21:01","updated_at":"2026-08-18 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Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72025","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 31b58088292c7f00f0b81088bfb557285b0b6247 096dff1247037d329c04b3a5be0ecdfb1c5c7ac6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 31b58088292c7f00f0b81088bfb557285b0b6247 d39cf4a6d721b1ae21eb53bbf3e8cd984253d7ab git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 31b58088292c7f00f0b81088bfb557285b0b6247 759d91378203ea35fa9bca6726dcf0010de081fb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 31b58088292c7f00f0b81088bfb557285b0b6247 036bc5661060702e798d215e81bb46da530965b3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\ns390/monwriter: Reject buffer reuse with different data length\n\nWhen data buffers are reused, e.g. for interval sample records, the\nfirst record determines the data length, and the size of the buffer for\nuser copy. Current monwriter code does not check if the data length was\nchanged for subsequent records, which also would never happen for valid\nuser programs.\n\nHowever, a malicious user could change the data length, resulting in out\nof bounds user copy to the kernel buffer, and memory corruption. By\ndefault, the monwriter misc device is created with root-only permissions,\nso practical impact is typically low.\n\nFix this by checking for changed data length and rejecting such records."}],"providerMetadata":{"dateUpdated":"2026-08-18T06:56:09.214Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/096dff1247037d329c04b3a5be0ecdfb1c5c7ac6"},{"url":"https://git.kernel.org/stable/c/d39cf4a6d721b1ae21eb53bbf3e8cd984253d7ab"},{"url":"https://git.kernel.org/stable/c/759d91378203ea35fa9bca6726dcf0010de081fb"},{"url":"https://git.kernel.org/stable/c/036bc5661060702e798d215e81bb46da530965b3"},{"url":"https://git.kernel.org/stable/c/01f3ce411711c2c919598ea25320a5a48f71edbc"},{"url":"https://git.kernel.org/stable/c/f0745496f7c171271cafd9457df3b914a483ddeb"},{"url":"https://git.kernel.org/stable/c/ae5347f3db1782c6118f6cc0d9fd8b1d43397db3"},{"url":"https://git.kernel.org/stable/c/2995ccec260caa9e85b3301a4aba1e66ed80ad74"}],"title":"s390/monwriter: Reject buffer reuse with different data length","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72025","datePublished":"2026-08-15T05:51:49.928Z","dateReserved":"2026-08-09T03:40:39.900Z","dateUpdated":"2026-08-18T06:56:09.214Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:21:01","lastModifiedDate":"2026-08-18 07:16:52","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72025","Ordinal":"1","Title":"s390/monwriter: Reject buffer reuse with different data length","CVE":"CVE-2026-72025","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72025","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/monwriter: Reject buffer reuse with different data length\n\nWhen data buffers are reused, e.g. for interval sample records, the\nfirst record determines the data length, and the size of the buffer for\nuser copy. Current monwriter code does not check if the data length was\nchanged for subsequent records, which also would never happen for valid\nuser programs.\n\nHowever, a malicious user could change the data length, resulting in out\nof bounds user copy to the kernel buffer, and memory corruption. By\ndefault, the monwriter misc device is created with root-only permissions,\nso practical impact is typically low.\n\nFix this by checking for changed data length and rejecting such records.","Type":"Description","Title":"s390/monwriter: Reject buffer reuse with different data length"}]}}}