GHSA-F8G6-PM49-2RCV
Vulnerability from github – Published: 2026-01-14 15:33 – Updated: 2026-07-14 15:31
VLAI
Details
In the Linux kernel, the following vulnerability has been resolved:
SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf
A zero length gss_token results in pages == 0 and in_token->pages[0] is NULL. The code unconditionally evaluates page_address(in_token->pages[0]) for the initial memcpy, which can dereference NULL even when the copy length is 0. Guard the first memcpy so it only runs when length > 0.
Severity
5.5 (Medium)
{
"affected": [],
"aliases": [
"CVE-2025-71120"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-14T15:16:01Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf\n\nA zero length gss_token results in pages == 0 and in_token-\u003epages[0]\nis NULL. The code unconditionally evaluates\npage_address(in_token-\u003epages[0]) for the initial memcpy, which can\ndereference NULL even when the copy length is 0. Guard the first\nmemcpy so it only runs when length \u003e 0.",
"id": "GHSA-f8g6-pm49-2rcv",
"modified": "2026-07-14T15:31:32Z",
"published": "2026-01-14T15:33:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71120"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1c8bb965e9b0559ff0f5690615a527c30f651dd8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7452d53f293379e2c38cfa8ad0694aa46fc4788b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a2c6f25ab98b423f99ccd94874d655b8bcb01a19"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a8f1e445ce3545c90d69c9e8ff8f7821825fe810"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d4b69a6186b215d2dc1ebcab965ed88e8d41768d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f9e53f69ac3bc4ef568b08d3542edac02e83fefd"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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