Linux Kernel RDMA/irdma Depth Calc Integer Overflow
CVE-2026-31491 Published on April 22, 2026
RDMA/irdma: Harden depth calculation functions
In the Linux kernel, the following vulnerability has been resolved:
RDMA/irdma: Harden depth calculation functions
An issue was exposed where OS can pass in U32_MAX for SQ/RQ/SRQ size.
This can cause integer overflow and truncation of SQ/RQ/SRQ depth
returning a success when it should have failed.
Harden the functions to do all depth calculations and boundary
checking in u64 sizes.
Products Associated with CVE-2026-31491
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Affected Versions
Linux:- Version 563e1feb5f6ed579acb55850f1bbb831aecf645a and below 3f08351de5ca4f2f724b86ad252fbc21289467e1 is affected.
- Version 563e1feb5f6ed579acb55850f1bbb831aecf645a and below cbd852f5700eb3f64392452faf693ac45cae8281 is affected.
- Version 563e1feb5f6ed579acb55850f1bbb831aecf645a and below e37afcb56ae070477741fe2d6e61fc0c542cce2d is affected.
- Version 6.18 is affected.
- Before 6.18 is unaffected.
- Version 6.18.21, <= 6.18.* is unaffected.
- Version 6.19.11, <= 6.19.* is unaffected.
- Version 7.0, <= * is unaffected.