CVE-2026-53398NFSD: Fix SECINFO_NO_NAME decode error cleanup
- 9.8CriticalCVSS base score
- 0.54%Exploitation in 30 daysEPSS · top 54% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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().
Timeline
ID reserved
By Linux
- 40 days later
· 40 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.54% · top 54% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 5e76b25d7cc82c148d391c0c43b884e6427cb302 – < 8836405abdc53ca3dd5fc68b2cf6f8f012fad011
- affected 07b68ff5c71cf4ed5443016d8eb116863c0a4d88 – < 49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439
- affected 3fdc546462348b8a497c72bc894e0cde9f10fc40 – < 5ec37edcb534f3fc92304be236d37f08e6545585
- affected 3fdc546462348b8a497c72bc894e0cde9f10fc40 – < 1e04be34cafae119e82bcaccd6d28a20f72a3647
- affected 3fdc546462348b8a497c72bc894e0cde9f10fc40 – < 161d1aaeb04d620d3692639700512bb5038c1e10
- affected 3fdc546462348b8a497c72bc894e0cde9f10fc40 – < c8a24effd96d4779e2ad779654682304491c55a5
- affected 3fdc546462348b8a497c72bc894e0cde9f10fc40 – < 46eb17d45be69d28c7a23ea03283b207426a8232
- affected 3fdc546462348b8a497c72bc894e0cde9f10fc40 – < 9e18e83b8846a5c3fe13fc8a464b4865d33996c6
- affected 5.10.220 – < 5.10.260
- affected 5.15.154 – < 5.15.211
- affected 6.1
- unaffected < 6.1
- unaffected 5.10.260 – ≤ 5.10.*
- unaffected 5.15.211 – ≤ 5.15.*
- unaffected 6.1.177 – ≤ 6.1.*
- unaffected 6.6.144 – ≤ 6.6.*
- unaffected 6.12.95 – ≤ 6.12.*
- unaffected 6.18.38 – ≤ 6.18.*
- unaffected 7.1.3 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/8836405abdc53ca3dd5fc68b2cf6f8f012fad011 (opens in a new tab)
- https://git.kernel.org/stable/c/49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439 (opens in a new tab)
- https://git.kernel.org/stable/c/5ec37edcb534f3fc92304be236d37f08e6545585 (opens in a new tab)
- https://git.kernel.org/stable/c/1e04be34cafae119e82bcaccd6d28a20f72a3647 (opens in a new tab)
- https://git.kernel.org/stable/c/161d1aaeb04d620d3692639700512bb5038c1e10 (opens in a new tab)
- https://git.kernel.org/stable/c/c8a24effd96d4779e2ad779654682304491c55a5 (opens in a new tab)
- https://git.kernel.org/stable/c/46eb17d45be69d28c7a23ea03283b207426a8232 (opens in a new tab)
- https://git.kernel.org/stable/c/9e18e83b8846a5c3fe13fc8a464b4865d33996c6 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-45520 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-53398)Record last updated .