CVE-2026-53398 (GCVE-0-2026-53398)
Vulnerability from cvelistv5 – Published: 2026-07-19 12:01 – Updated: 2026-08-17 04:50
VLAI
EPSS
VEX
Title
NFSD: Fix SECINFO_NO_NAME decode error cleanup
Summary
In the Linux kernel, the following vulnerability has been resolved:
NFSD: Fix SECINFO_NO_NAME decode error cleanup
nfsd4_decode_secinfo_no_name() currently initializes sin_exp after
decoding sin_style. If the XDR stream is truncated, the decoder returns
nfserr_bad_xdr before sin_exp is initialized.
Since commit 3fdc54646234 ("NFSD: Reduce amount of struct
nfsd4_compoundargs that needs clearing"), the inline iops array is not
cleared between RPC calls. A failed SECINFO_NO_NAME decode can therefore
leave sin_exp holding stale union contents from a previous operation.
The error response path still invokes nfsd4_secinfo_no_name_release(),
which calls exp_put() on a non-NULL sin_exp.
Initialize sin_exp before the first failable decode step, matching
nfsd4_decode_secinfo().
Severity
9.8 (Critical)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
5e76b25d7cc82c148d391c0c43b884e6427cb302 , < 8836405abdc53ca3dd5fc68b2cf6f8f012fad011
(git)
Affected: 07b68ff5c71cf4ed5443016d8eb116863c0a4d88 , < 49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439 (git) Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 5ec37edcb534f3fc92304be236d37f08e6545585 (git) Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 1e04be34cafae119e82bcaccd6d28a20f72a3647 (git) Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 161d1aaeb04d620d3692639700512bb5038c1e10 (git) Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < c8a24effd96d4779e2ad779654682304491c55a5 (git) Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 46eb17d45be69d28c7a23ea03283b207426a8232 (git) Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 9e18e83b8846a5c3fe13fc8a464b4865d33996c6 (git) Affected: 5.10.220 , < 5.10.260 (semver) Affected: 5.15.154 , < 5.15.211 (semver) |
guessed | |
| Linux | Linux |
Affected:
6.1
Unaffected: 0 , < 6.1 (semver) Unaffected: 5.10.260 , ≤ 5.10.* (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
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A failed SECINFO_NO_NAME decode can therefore\\nleave sin_exp holding stale union contents from a previous operation.\\n\\nThe error response path still invokes nfsd4_secinfo_no_name_release(),\\nwhich calls exp_put() on a non-NULL sin_exp.\\n\\nInitialize sin_exp before the first failable decode step, matching\\nnfsd4_decode_secinfo().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/nfsd/nfs4xdr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5e76b25d7cc82c148d391c0c43b884e6427cb302\",\"lessThan\":\"8836405abdc53ca3dd5fc68b2cf6f8f012fad011\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"07b68ff5c71cf4ed5443016d8eb116863c0a4d88\",\"lessThan\":\"49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3fdc546462348b8a497c72bc894e0cde9f10fc40\",\"lessThan\":\"5ec37edcb534f3fc92304be236d37f08e6545585\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3fdc546462348b8a497c72bc894e0cde9f10fc40\",\"lessThan\":\"1e04be34cafae119e82bcaccd6d28a20f72a3647\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3fdc546462348b8a497c72bc894e0cde9f10fc40\",\"lessThan\":\"161d1aaeb04d620d3692639700512bb5038c1e10\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3fdc546462348b8a497c72bc894e0cde9f10fc40\",\"lessThan\":\"c8a24effd96d4779e2ad779654682304491c55a5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3fdc546462348b8a497c72bc894e0cde9f10fc40\",\"lessThan\":\"46eb17d45be69d28c7a23ea03283b207426a8232\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3fdc546462348b8a497c72bc894e0cde9f10fc40\",\"lessThan\":\"9e18e83b8846a5c3fe13fc8a464b4865d33996c6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.10.220\",\"lessThan\":\"5.10.260\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.154\",\"lessThan\":\"5.15.211\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/nfsd/nfs4xdr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.1\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.1\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.260\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.211\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.177\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.144\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.95\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.38\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.3\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10.220\",\"versionEndExcluding\":\"5.10.260\",\"matchCriteriaId\":\"AC66BC4A-1CF7-4DF3-88F5-9F3A16336769\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15.154\",\"versionEndExcluding\":\"5.15.211\",\"matchCriteriaId\":\"E3978EB0-5691-4D70-AE21-624E11923A8B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.1\",\"versionEndExcluding\":\"6.1.177\",\"matchCriteriaId\":\"7B153242-AC4E-4978-A3B6-5A63C1297CC1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.144\",\"matchCriteriaId\":\"C8AD3BC8-C843-423C-B9DB-CB52F67F578E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.95\",\"matchCriteriaId\":\"4E206B86-E0E3-4394-A93F-39F2D50A8AA8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.38\",\"matchCriteriaId\":\"FA591B28-5D62-449E-BDBE-3C9391BF070A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"7.1.3\",\"matchCriteriaId\":\"9526B150-E2B3-4C6F-8AE5-1AF92B75AD9E\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/161d1aaeb04d620d3692639700512bb5038c1e10\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1e04be34cafae119e82bcaccd6d28a20f72a3647\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/46eb17d45be69d28c7a23ea03283b207426a8232\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5ec37edcb534f3fc92304be236d37f08e6545585\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8836405abdc53ca3dd5fc68b2cf6f8f012fad011\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9e18e83b8846a5c3fe13fc8a464b4865d33996c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c8a24effd96d4779e2ad779654682304491c55a5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-07-20T15:27:46+00:00",
"cve": "CVE-2026-53398",
"id": "CVE-2026-53398",
"initial_release_date": "2026-07-19T00:00:00+00:00",
"product_status:known_affected": "184",
"product_status:known_not_affected": "76",
"product_status:under_investigation": "14",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: NFSD: Fix SECINFO_NO_NAME decode error cleanup",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53398.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-31T16:41:25Z",
"cve": "CVE-2026-53398",
"id": "CVE-2026-53398",
"initial_release_date": "2026-07-19T17:35:58Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "453",
"product_status:known_not_affected": "251",
"product_status:recommended": "254",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-53398",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53398.json",
"version": "17"
}
}
}
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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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