{"id":"CVE-2026-72495","title":"RDMA/bnxt_re: Avoid repeated requests to allocate WC pages","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/bnxt_re: Avoid repeated requests to allocate WC pages\n\nApplications can request multiple WC pages for the same ucontext.\nAs of now, only 1 WC page per ucontext is …","severity":"critical","cvss":9.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-770"],"vendor":"Linux","product":"Linux","affected":["Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < 8e59bd37d6d63a06ed452eaffe6c9d4ad903af7b","Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < 00c71846874fea4917961236e49287a1850dcf98","Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < 478c4d24193fe3e6aa2accd4874ae43000e4a217","Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < da406b8b49c1dfe661a497483940d7ee781430db","Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < 441baa79043431807115fd030d7d0bb14ed441a0","Linux 6.5"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:51:00.430753Z"},"published":"2026-08-15","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:45:04.330Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72495","references":[{"url":"https://git.kernel.org/stable/c/8e59bd37d6d63a06ed452eaffe6c9d4ad903af7b"},{"url":"https://git.kernel.org/stable/c/00c71846874fea4917961236e49287a1850dcf98"},{"url":"https://git.kernel.org/stable/c/478c4d24193fe3e6aa2accd4874ae43000e4a217"},{"url":"https://git.kernel.org/stable/c/da406b8b49c1dfe661a497483940d7ee781430db"},{"url":"https://git.kernel.org/stable/c/441baa79043431807115fd030d7d0bb14ed441a0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72495.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-72495"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516310"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72495"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72495"},{"url":"https://lore.kernel.org/linux-cve-announce/2026081539-CVE-2026-72495-d1ba@gregkh/T"}],"tags":["cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00185,"epssPercentile":0.0818,"scores":{"cna":9.3,"vendor":5.5},"ingestedAt":"2026-10-16T19:46:24.390Z","slug":"CVE-2026-72495","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/bnxt_re: Avoid repeated requests to allocate WC pages\n\nApplications can request multiple WC pages for the same ucontext.\nAs of now, only 1 WC page per ucontext is supported. Add a lock to\navoid concurrent access and a check to fail repeated requests.\nAlso, if the mmap entry insert fails for the WC, free the Doorbell\npage index mapped for the WC page.\n\n## Affected\n\n- `Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < 8e59bd37d6d63a06ed452eaffe6c9d4ad903af7b`\n- `Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < 00c71846874fea4917961236e49287a1850dcf98`\n- `Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < 478c4d24193fe3e6aa2accd4874ae43000e4a217`\n- `Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < da406b8b49c1dfe661a497483940d7ee781430db`\n- `Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < 441baa79043431807115fd030d7d0bb14ed441a0`\n- `Linux 6.5`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72495.json)","depth":"midnight","depthScore":51,"depthScoreParts":{"impact":51.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":227189,"id":"CVE-2026-72495","ts":1792586981868,"field":"cvss","old":"5.5","new":"9.3"},{"seq":227188,"id":"CVE-2026-72495","ts":1792586981868,"field":"severity","old":"medium","new":"critical"},{"seq":223627,"id":"CVE-2026-72495","ts":1792238341190,"field":"cvss","old":"9.3","new":"5.5"},{"seq":223626,"id":"CVE-2026-72495","ts":1792238341190,"field":"severity","old":"critical","new":"medium"}]}