CVE-2026-52908 (GCVE-0-2026-52908)

Vulnerability from cvelistv5 – Published: 2026-06-19 14:00 – Updated: 2026-08-05 12:31
VLAI
Title
RDMA: During rereg_mr ensure that REREG_ACCESS is compatible
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA: During rereg_mr ensure that REREG_ACCESS is compatible If IB_MR_REREG_ACCESS changes from RO to RW then the umem has to be re-evaluated to ensure it is properly pinned as RW. Since the umem is hidden inside each driver's mr struct add a ib_umem_check_rereg() function that each driver has to call before processing IB_MR_REREG_ACCESS. mlx4 has to retain its duplicate ib_access_writable check because it implements IB_MR_REREG_ACCESS | IB_MR_REREG_TRANS by changing both items in place sequentially while the MR is live, so it will continue to not support this combination.
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
Linux Linux Affected: b40656aa7d559adc1fe689396dc58b92a9a27286 , < 09dc18894148381d3bfc550083b1236043870dce (git)
Affected: b40656aa7d559adc1fe689396dc58b92a9a27286 , < eba5df21eda0fe7418efbea2f799f8ea1b8ca94c (git)
Affected: b40656aa7d559adc1fe689396dc58b92a9a27286 , < 2904e985a2917b5dac65df82733065e78a65fc9d (git)
Affected: b40656aa7d559adc1fe689396dc58b92a9a27286 , < 50334a05a950840b39a1ce3d2a173b4183db9b3e (git)
Affected: b40656aa7d559adc1fe689396dc58b92a9a27286 , < badad6fad60def1b9805559dd81dbab3d97b82aa (git)
Create a notification for this product.
Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "RDMA: During rereg_mr ensure that REREG_ACCESS is compatible",
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-09T20:27:19+00:00",
      "cve": "CVE-2026-52908",
      "id": "CVE-2026-52908",
      "initial_release_date": "2026-06-19T00:00:00+00:00",
      "product_status:known_affected": "246",
      "product_status:known_not_affected": "28",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: RDMA: During rereg_mr ensure that REREG_ACCESS is compatible",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52908.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-24T02:20:06Z",
      "cve": "CVE-2026-52908",
      "id": "CVE-2026-52908",
      "initial_release_date": "2026-06-23T02:20:11Z",
      "product_status:first_fixed": "55",
      "product_status:known_affected": "441",
      "product_status:known_not_affected": "181",
      "product_status:recommended": "209",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-52908",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-52908.json",
      "version": "9"
    }
  }
}



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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.

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  • 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.
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  • 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.


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