Vulnerability-Lookup

GHSA-3QFW-CX2F-H9PJ

Vulnerability from github – Published: 2026-10-23 15:31 – Updated: 2026-10-23 15:31

Details

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

riscv: ptrace: Zero-initialize regset buffers before copyin

user_regset_copyin() only copies count bytes, so a PTRACE_SETREGSET request with a short iov_len leaves the rest of the stack buffer uninitialized. In riscv_vr_set() that garbage is validated and copied into the target's vstate, and in riscv_cfi_set() it can be stored as the target's shadow stack pointer. Zero both buffers, as the get path already does.

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  "affected": [],
  "aliases": [
    "CVE-2026-98951"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-23T13:17:16Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: ptrace: Zero-initialize regset buffers before copyin\n\nuser_regset_copyin() only copies `count` bytes, so a PTRACE_SETREGSET\nrequest with a short iov_len leaves the rest of the stack buffer\nuninitialized. In riscv_vr_set() that garbage is validated and copied\ninto the target\u0027s vstate, and in riscv_cfi_set() it can be stored as\nthe target\u0027s shadow stack pointer. Zero both buffers, as the get path\nalready does.",
  "id": "GHSA-3qfw-cx2f-h9pj",
  "modified": "2026-10-23T15:31:32Z",
  "published": "2026-10-23T15:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98951"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/59052a88ba5fe4a7bb34b3a0a42aa5d453d3bb97"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89fc70d73f4ac8781f9e15edd1dbc6b6088453b3"
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CVE-2026-98951 (GCVE-0-2026-98951)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:19 – Updated: 2026-10-23 12:19

Title

riscv: ptrace: Zero-initialize regset buffers before copyin

Summary

In the Linux kernel, the following vulnerability has been resolved: riscv: ptrace: Zero-initialize regset buffers before copyin user_regset_copyin() only copies `count` bytes, so a PTRACE_SETREGSET request with a short iov_len leaves the rest of the stack buffer uninitialized. In riscv_vr_set() that garbage is validated and copied into the target's vstate, and in riscv_cfi_set() it can be stored as the target's shadow stack pointer. Zero both buffers, as the get path already does.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7067 records in the last 180 days details

References

2 references

URL	Tags
https://git.kernel.org/stable/c/89fc70d73f4ac8781…
https://git.kernel.org/stable/c/59052a88ba5fe4a7b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9300f00439743c4a34d735e1a27118eb68a1504e , < 89fc70d73f4ac8781f9e15edd1dbc6b6088453b3 (git) Affected: 9300f00439743c4a34d735e1a27118eb68a1504e , < 59052a88ba5fe4a7bb34b3a0a42aa5d453d3bb97 (git) Affected: f2a9cd050901c4734bc175294c3bd6a40a1a9e99 (git) Affected: 6.5.3 , < 6.6 (semver)
Linux	Linux	Affected: 6.6 Unaffected: 0 , < 6.6 (semver) Unaffected: 7.2.11 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

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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.
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