Vulnerability-Lookup

GHSA-GMQC-X8HX-2GGC

Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-11 21:31

Details

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

params: fix charp corruption on allocation failure

param_set_charp() stores charp parameters in allocated memory after slab is available, and releases the previous value when the parameter is updated.

The previous value is released before the replacement allocation succeeds. If kmalloc_parameter() fails, the setter returns -ENOMEM with the parameter left as NULL.

Failing zswap's compressor update before zswap is initialized can later trigger:

BUG: kernel NULL pointer dereference, address: 0000000000000000 RIP: 0010:strcmp+0x10/0x30 Call Trace: zswap_setup+0x3b1/0x490 zswap_enabled_param_set+0x5b/0xa0 param_attr_store+0x93/0xe0 module_attr_store+0x1c/0x30 kernfs_fop_write_iter+0x116/0x1f0

Allocate and copy the replacement first, then replace the parameter value only after allocation succeeds.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-89552"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-11T20:19:38Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nparams: fix charp corruption on allocation failure\n\nparam_set_charp() stores charp parameters in allocated memory after slab is\navailable, and releases the previous value when the parameter is updated.\n\nThe previous value is released before the replacement allocation succeeds.\nIf kmalloc_parameter() fails, the setter returns -ENOMEM with the parameter\nleft as NULL.\n\nFailing zswap\u0027s compressor update before zswap is initialized can later\ntrigger:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  RIP: 0010:strcmp+0x10/0x30\n  Call Trace:\n    zswap_setup+0x3b1/0x490\n    zswap_enabled_param_set+0x5b/0xa0\n    param_attr_store+0x93/0xe0\n    module_attr_store+0x1c/0x30\n    kernfs_fop_write_iter+0x116/0x1f0\n\nAllocate and copy the replacement first, then replace the parameter value\nonly after allocation succeeds.",
  "id": "GHSA-gmqc-x8hx-2ggc",
  "modified": "2026-09-11T21:31:32Z",
  "published": "2026-09-11T21:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89552"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d8e2404925a0607ffec79a53170715a46936896"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3dfaae04243cde460d82dfc2a7dd0bb6664d20ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/614f873268c5b172804c9af6639bd17b7e1e2359"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/704ecd010d4a9b33160e40b74eb402f6b86a18e0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-89552 (GCVE-0-2026-89552)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:44 – Updated: 2026-09-11 19:44

Title

params: fix charp corruption on allocation failure

Summary

In the Linux kernel, the following vulnerability has been resolved: params: fix charp corruption on allocation failure param_set_charp() stores charp parameters in allocated memory after slab is available, and releases the previous value when the parameter is updated. The previous value is released before the replacement allocation succeeds. If kmalloc_parameter() fails, the setter returns -ENOMEM with the parameter left as NULL. Failing zswap's compressor update before zswap is initialized can later trigger: BUG: kernel NULL pointer dereference, address: 0000000000000000 RIP: 0010:strcmp+0x10/0x30 Call Trace: zswap_setup+0x3b1/0x490 zswap_enabled_param_set+0x5b/0xa0 param_attr_store+0x93/0xe0 module_attr_store+0x1c/0x30 kernfs_fop_write_iter+0x116/0x1f0 Allocate and copy the replacement first, then replace the parameter value only after allocation succeeds.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/614f873268c5b1728…
https://git.kernel.org/stable/c/704ecd010d4a9b331…
https://git.kernel.org/stable/c/0d8e2404925a0607f…
https://git.kernel.org/stable/c/3dfaae04243cde460…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e180a6b7759a99a28cbcce3547c4c80822cb6c2a , < 614f873268c5b172804c9af6639bd17b7e1e2359 (git) Affected: e180a6b7759a99a28cbcce3547c4c80822cb6c2a , < 704ecd010d4a9b33160e40b74eb402f6b86a18e0 (git) Affected: e180a6b7759a99a28cbcce3547c4c80822cb6c2a , < 0d8e2404925a0607ffec79a53170715a46936896 (git) Affected: e180a6b7759a99a28cbcce3547c4c80822cb6c2a , < 3dfaae04243cde460d82dfc2a7dd0bb6664d20ae (git)
Linux	Linux	Affected: 2.6.30 Unaffected: 0 , < 2.6.30 (semver) Unaffected: 6.12.109 , ≤ 6.12.* (semver) Unaffected: 6.18.50 , ≤ 6.18.* (semver) Unaffected: 7.2.4 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/params.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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              "status": "affected",
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          "versions": [
            {
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              "version": "2.6.30"
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              "status": "unaffected",
              "version": "6.18.50",
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              "status": "unaffected",
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              "versionType": "semver"
            },
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        "dateUpdated": "2026-09-11T19:44:26.091Z",
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    "datePublished": "2026-09-11T19:44:26.091Z",
    "dateReserved": "2026-09-11T19:38:34.723Z",
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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.

Detection rules are retrieved from Rulezet.

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-GMQC-X8HX-2GGC

CVE-2026-89552 (GCVE-0-2026-89552)

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Nomenclature