{"id":"CVE-2026-31491","title":"RDMA/irdma: Harden depth calculation functions","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Harden depth calculation functions\n\nAn issue was exposed where OS can pass in U32_MAX for SQ/RQ/SRQ size.\nThis can cause integer overflow and truncation of …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 563e1feb5f6ed579acb55850f1bbb831aecf645a < 3f08351de5ca4f2f724b86ad252fbc21289467e1","Linux >= 563e1feb5f6ed579acb55850f1bbb831aecf645a < cbd852f5700eb3f64392452faf693ac45cae8281","Linux >= 563e1feb5f6ed579acb55850f1bbb831aecf645a < e37afcb56ae070477741fe2d6e61fc0c542cce2d","Linux 6.18"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T21:35:07.008894Z"},"published":"2026-04-22","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:45:01.859Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31491","references":[{"url":"https://git.kernel.org/stable/c/3f08351de5ca4f2f724b86ad252fbc21289467e1"},{"url":"https://git.kernel.org/stable/c/cbd852f5700eb3f64392452faf693ac45cae8281"},{"url":"https://git.kernel.org/stable/c/e37afcb56ae070477741fe2d6e61fc0c542cce2d"}],"tags":["cve.org"],"epss":0.00121,"epssPercentile":0.01903,"ingestedAt":"2026-11-05T22:38:32.151Z","slug":"CVE-2026-31491","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Harden depth calculation functions\n\nAn issue was exposed where OS can pass in U32_MAX for SQ/RQ/SRQ size.\nThis can cause integer overflow and truncation of SQ/RQ/SRQ depth\nreturning a success when it should have failed.\n\nHarden the functions to do all depth calculations and boundary\nchecking in u64 sizes.\n\n## Affected\n\n- `Linux >= 563e1feb5f6ed579acb55850f1bbb831aecf645a < 3f08351de5ca4f2f724b86ad252fbc21289467e1`\n- `Linux >= 563e1feb5f6ed579acb55850f1bbb831aecf645a < cbd852f5700eb3f64392452faf693ac45cae8281`\n- `Linux >= 563e1feb5f6ed579acb55850f1bbb831aecf645a < e37afcb56ae070477741fe2d6e61fc0c542cce2d`\n- `Linux 6.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}