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GHSA-GHQ7-V2F8-82JR

Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-17 18:32

Details

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

bpf: Clear buf on error in __bpf_get_task_stack

Both bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that use __bpf_get_task_stack have buf defined as ARG_PTR_TO_UNINIT_MEM argument and we should initialize the buf on every return path.

Adding missing buf memset for __bpf_get_task_stack fail paths. This provides deterministic buffer contents, which is useful when the buffer is used directly as a map key.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90300"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:17:27Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Clear buf on error in __bpf_get_task_stack\n\nBoth bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that\nuse __bpf_get_task_stack have buf defined as ARG_PTR_TO_UNINIT_MEM\nargument and we should initialize the buf on every return path.\n\nAdding missing buf memset for __bpf_get_task_stack fail paths. This\nprovides deterministic buffer contents, which is useful when the buffer\nis used directly as a map key.",
  "id": "GHSA-ghq7-v2f8-82jr",
  "modified": "2026-09-17T18:32:00Z",
  "published": "2026-09-17T18:31:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90300"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f523359c4789bb0396d2d642464a6e2fd4f2299d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f5d242825ca417bb6afe35fde6e8880f97ca43fb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-90300 (GCVE-0-2026-90300)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:08 – Updated: 2026-09-17 16:08

Title

bpf: Clear buf on error in __bpf_get_task_stack

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: Clear buf on error in __bpf_get_task_stack Both bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that use __bpf_get_task_stack have buf defined as ARG_PTR_TO_UNINIT_MEM argument and we should initialize the buf on every return path. Adding missing buf memset for __bpf_get_task_stack fail paths. This provides deterministic buffer contents, which is useful when the buffer is used directly as a map key.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/f523359c4789bb039…
https://git.kernel.org/stable/c/f5d242825ca417bb6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df , < f523359c4789bb0396d2d642464a6e2fd4f2299d (git) Affected: 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df , < f5d242825ca417bb6afe35fde6e8880f97ca43fb (git) Affected: d921baabd96445ef9c9c9410ca06164359c8a1a5 (git) Affected: 9c020a533eaae1c2d41a7e3835c4c818a9b4b656 (git) Affected: ff6bdc205fd0a83bd365405d4e31fb5905826996 (git) Affected: 5.10.30 , < 5.11 (semver) Affected: 5.11.14 , < 5.12 (semver) Affected: 5.10.96 , < 5.11 (semver)
Linux	Linux	Affected: 5.12 Unaffected: 0 , < 5.12 (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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          "programFiles": [
            "kernel/bpf/stackmap.c"
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          "vendor": "Linux",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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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.

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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GHSA-GHQ7-V2F8-82JR

CVE-2026-90300 (GCVE-0-2026-90300)

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