Vulnerability-Lookup

GHSA-75WM-G4R7-3G94

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-10-21 15:40

Details

In the Linux kernel, the following vulnerability has been resolved:

RDMA/bnxt_re: Free SRQ toggle page after firmware teardown

Free the toggle page only after firmware teardown completes so that an NQ interrupt arriving during bnxt_qplib_destroy_srq() won't write the toggle values to an already-freed page. Move free_page() after bnxt_qplib_destroy_srq().

Severity

8.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72500"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:24Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/bnxt_re: Free SRQ toggle page after firmware teardown\n\nFree the toggle page only after firmware teardown completes so that\nan NQ interrupt arriving during bnxt_qplib_destroy_srq() won\u0027t write\nthe toggle values to an already-freed page. Move free_page() after\nbnxt_qplib_destroy_srq().",
  "id": "GHSA-75wm-g4r7-3g94",
  "modified": "2026-10-21T15:40:53Z",
  "published": "2026-08-15T06:32:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72500"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0adcd67f3d6f84835be682da0153f57f5c2f8036"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/104a7ff382a58a83cae018925e3574c784e8274c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/131e2918b9b0529687e67e2e58047304027f095a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b6ecad5b9b0f7230ed725aafaf8c4ed9327a9bf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-72500 (GCVE-0-2026-72500)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:57 – Updated: 2026-10-21 12:45

Title

RDMA/bnxt_re: Free SRQ toggle page after firmware teardown

Summary

In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxt_re: Free SRQ toggle page after firmware teardown Free the toggle page only after firmware teardown completes so that an NQ interrupt arriving during bnxt_qplib_destroy_srq() won't write the toggle values to an already-freed page. Move free_page() after bnxt_qplib_destroy_srq().

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-16 18:51 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7033 records in the last 180 days details

References

4 references

URL	Tags
https://git.kernel.org/stable/c/3b6ecad5b9b0f7230…
https://git.kernel.org/stable/c/104a7ff382a58a83c…
https://git.kernel.org/stable/c/0adcd67f3d6f84835…
https://git.kernel.org/stable/c/131e2918b9b052968…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 181028a0d84cdcc7ac86d05cc49eaa416ce85c8b , < 3b6ecad5b9b0f7230ed725aafaf8c4ed9327a9bf (git) Affected: 181028a0d84cdcc7ac86d05cc49eaa416ce85c8b , < 104a7ff382a58a83cae018925e3574c784e8274c (git) Affected: 181028a0d84cdcc7ac86d05cc49eaa416ce85c8b , < 0adcd67f3d6f84835be682da0153f57f5c2f8036 (git) Affected: 181028a0d84cdcc7ac86d05cc49eaa416ce85c8b , < 131e2918b9b0529687e67e2e58047304027f095a (git)
Linux	Linux	Affected: 6.12 Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.114 , ≤ 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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                "id": "CVE-2026-72500",
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              "value": "AV:L - The bug is triggered by destroying a user SRQ through the RDMA uverbs ioctl on /dev/infiniband/uverbs*; although RoCE peers can generate SRQ/NQ events, the premature free_page() only occurs in this local destroy path, not from remote packet handling alone.\nAC:L - An attacker controls SRQ teardown timing via ibv_destroy_srq and can reliably create the race by keeping QPs/posted receives active and/or soliciting SRQ threshold events (including from a cooperating RoCE peer) while destroy_srq runs through bnxt_qplib_destroy_srq firmware teardown.\nPR:L - Exploitation requires only local RDMA verbs access to create/destroy a user SRQ on a Gen P7 bnxt_re device; uverbs char devices are created world-accessible (0666) and RDMA is commonly granted to unprivileged HPC/cloud/Kubernetes workload users rather than real root.\nUI:N - No victim interaction is required beyond the attacker (or compromised local workload) invoking SRQ destroy on resources it already controls; remote peers may assist timing but do not need the victim to click, mount, or open files.\nS:C - On Kubernetes/HPC hosts that expose bnxt_re to containers/pods, triggering this host-kernel UAF from an unprivileged RDMA-enabled workload can corrupt host memory and enable container-to-host sandbox escape beyond the workload security boundary.\nC:H - This is a kernel write-after-free: an NQ interrupt writes a toggle value into a page already returned to the buddy allocator, enabling corruption of subsequently reallocated kernel objects and classic UAF-based information disclosure primitives.\nI:H - The interrupt path performs a controlled 4-byte write to freed kernel memory during destroy_srq, providing a heap corruption primitive that can be developed into arbitrary kernel write or code execution rather than being limited to a benign crash.\nA:H - Writing to a freed page during interrupt handling can oops/panic the kernel immediately, and repeated SRQ create/destroy cycles let an attacker reliably induce host-level denial of service on RDMA-enabled systems."
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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.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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