CVE-2026-74297 (GCVE-0-2026-74297)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:58 – Updated: 2026-08-17 05:45
VLAI
Title
RDMA/mlx5: Fix undefined shift of user RQ WQE size
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix undefined shift of user RQ WQE size set_rq_size() computes the RQ WQE size as "1 << rq_wqe_shift" based on the user-provided rq_wqe_shift, which is only checked to be greater than 32, so shifts of 32 are still accepted. A shift of 31 also overflows a signed integer, leading to undefined behavior. Use check_shl_overflow() to compute the RQ WQE size and reject any invalid values.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c , < 9fff54929cc00849d738faa99f06c32399aeb026 (git)
Affected: e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c , < b746f949c2ac2b041102836095d6d4a2ef21fa75 (git)
Affected: e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c , < c1dbf52d24a8cb1aa56780ba51b72e7d495f258c (git)
Affected: e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c , < 6fc874fdfb366bfb11c62e6af9a831c8be59ddda (git)
Affected: e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c , < 42f3d2c8c18b92ea33e506a38b64f1a8986c2823 (git)
Affected: e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c , < 4b87a2497276a72fd63028e7419abf0fb7ed837b (git)
Affected: e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c , < b732db02a2b04cde393638df19de6251ce62a74e (git)
Affected: e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c , < d881d60223aac8fdc12b227d89c76e131e92a9cd (git)
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Linux Linux Affected: 3.11
Unaffected: 0 , < 3.11 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix undefined shift of user RQ WQE size\n\nset_rq_size() computes the RQ WQE size as \"1 \u003c\u003c rq_wqe_shift\" based on\nthe user-provided rq_wqe_shift, which is only checked to be greater than\n32, so shifts of 32 are still accepted. A shift of 31 also overflows a\nsigned integer, leading to undefined behavior.\n\nUse check_shl_overflow() to compute the RQ WQE size and reject any\ninvalid values."
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                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
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      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: RDMA/mlx5: Fix undefined shift of user RQ WQE size",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74297.json",
      "version": "3"
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      "cve": "CVE-2026-74297",
      "id": "CVE-2026-74297",
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      "product_status:first_fixed": "23",
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      "product_status:known_not_affected": "12",
      "product_status:recommended": "107",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-74297",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-74297.json",
      "version": "9"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.