CVE-2026-45964 (GCVE-0-2026-45964)
Vulnerability from cvelistv5 – Published: 2026-05-27 12:18 – Updated: 2026-05-27 12:18
VLAI
EPSS
VEX
Title
SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path
Summary
In the Linux kernel, the following vulnerability has been resolved:
SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path
Commit 5940d1cf9f42 ("SUNRPC: Rebalance a kref in auth_gss.c") added
a kref_get(&gss_auth->kref) call to balance the gss_put_auth() done
in gss_release_msg(), but forgot to add a corresponding kref_put()
on the error path when kstrdup_const() fails.
If service_name is non-NULL and kstrdup_const() fails, the function
jumps to err_put_pipe_version which calls put_pipe_version() and
kfree(gss_msg), but never releases the gss_auth reference. This leads
to a kref leak where the gss_auth structure is never freed.
Add a forward declaration for gss_free_callback() and call kref_put()
in the err_put_pipe_version error path to properly release the
reference taken earlier.
Severity
5.5 (Medium)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < 3b2b6c42070ce4204936288253baf101e995c2d3
(git)
Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7 (git) Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6 (git) Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < 655c9ba9915f05266998dbbf4b76b3c79b8a70aa (git) Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < e464e26b2457005c87e158570498274b9f3b90c7 (git) Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < c20f925214249bb4fc04f7e197bea142a6438af6 (git) Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < a2d4e9a76de0b2178001214ba5de5bf94a7354aa (git) Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < dd2fdc3504592d85e549c523b054898a036a6afe (git) |
guessed | |
| Linux | Linux |
Affected:
5.2
Unaffected: 0 , < 5.2 (semver) Unaffected: 5.10.252 , ≤ 5.10.* (semver) Unaffected: 5.15.202 , ≤ 5.15.* (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.14 , ≤ 6.18.* (semver) Unaffected: 6.19.4 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
guessed |
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}
],
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"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-06-28T06:43:18+00:00",
"cve": "CVE-2026-45964",
"id": "CVE-2026-45964",
"initial_release_date": "2026-05-27T00:00:00+00:00",
"product_status:known_affected": "246",
"product_status:known_not_affected": "28",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45964.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T01:13:55Z",
"cve": "CVE-2026-45964",
"id": "CVE-2026-45964",
"initial_release_date": "2026-05-28T03:55:19Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "578",
"product_status:known_not_affected": "125",
"product_status:recommended": "279",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-45964",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-45964.json",
"version": "19"
}
}
}
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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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