Answer in brief
CVE-2026-53398 records a Critical severity (CVSS 9.8) vulnerability in NFSD: Fix SECINFO_NO_NAME decode error cleanup. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=5e76b25d7cc82c148d391c0c43b884e6427cb302 <8836405abdc53ca3dd5fc68b2cf6f8f012fad011 || >=07b68ff5c71cf4ed5443016d8eb116863c0a4d88 <49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439 || >=3fdc546462348b8a497c72bc894e0cde9f10fc40 <5ec37edcb534f3fc92304be236d37f08e6545585 || >=3fdc546462348b8a497c72bc894e0cde9f10fc40 <1e04be34cafae119e82bcaccd6d28a20f72a3647 || >=3fdc546462348b8a497c72bc894e0cde9f10fc40 <161d1aaeb04d620d3692639700512bb5038c1e10 || >=3fdc546462348b8a497c72bc894e0cde9f10fc40 <c8a24effd96d4779e2ad779654682304491c55a5 || >=3fdc546462348b8a497c72bc894e0cde9f10fc40 <46eb17d45be69d28c7a23ea03283b207426a8232 || >=3fdc546462348b8a497c72bc894e0cde9f10fc40 <9e18e83b8846a5c3fe13fc8a464b4865d33996c6 || >=5.10.220 <5.10.260 || >=5.15.154 <5.15.211 | 8836405abdc53ca3dd5fc68b2cf6f8f012fad011, 49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439, 5ec37edcb534f3fc92304be236d37f08e6545585, 1e04be34cafae119e82bcaccd6d28a20f72a3647, 161d1aaeb04d620d3692639700512bb5038c1e10, c8a24effd96d4779e2ad779654682304491c55a5, 46eb17d45be69d28c7a23ea03283b207426a8232, 9e18e83b8846a5c3fe13fc8a464b4865d33996c6, 5.10.260, 5.15.211 |
| Linux/Linuxgeneric | 6.1 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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().
Quoted source text, attributed separately from HOL analysis.