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CVE-2026-31491RDMA/irdma: Harden depth calculation functions

Description

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.

Timeline

  1. ID reserved

    By Linux

  2. · 44 days later

    Published

  3. · 7 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-31491, by who scored it
Scored byCVSSScoreVector
NVDNVD · Analyzed3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.12% · top 98% of all CVEs (14 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Affected products

  • Linux · Linux

    • affected 563e1feb5f6ed579acb55850f1bbb831aecf645a – < 3f08351de5ca4f2f724b86ad252fbc21289467e1
    • affected 563e1feb5f6ed579acb55850f1bbb831aecf645a – < cbd852f5700eb3f64392452faf693ac45cae8281
    • affected 563e1feb5f6ed579acb55850f1bbb831aecf645a – < e37afcb56ae070477741fe2d6e61fc0c542cce2d

  • Linux · Linux

    • affected 6.18
    • unaffected < 6.18
    • unaffected 6.18.21 – ≤ 6.18.*
    • unaffected 6.19.11 – ≤ 6.19.*
    • unaffected 7.0 – ≤ *

References

References3

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .