Get a Demo

Let's Patch It!

Book a short call with one our specialists, we'll walk you through how Endor Patches work, and ask you a few questions about your environment (like your primary programming languages and repository management). We'll also send you an email right after you fill out the form, feel free to reply with any questions you have in advance!

CVE

CVE-2026-53398

NFSD: Fix SECINFO_NO_NAME decode error cleanup
Back to all
CVE

CVE-2026-53398

NFSD: Fix SECINFO_NO_NAME decode error cleanup

In the Linux kernel, the following vulnerability has been resolved:

NFSD: Fix SECINFONONAME decode error cleanup

nfsd4decodesecinfononame() currently initializes sin_exp after

decoding sin_style. If the XDR stream is truncated, the decoder returns

nfserrbadxdr 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 SECINFONONAME decode can therefore

leave sin_exp holding stale union contents from a previous operation.

The error response path still invokes nfsd4secinfononamerelease(),

which calls expput() on a non-NULL sinexp.

Initialize sin_exp before the first failable decode step, matching

nfsd4decodesecinfo().

Package Versions Affected

Package Version
patch Availability
No items found.

Automatically patch vulnerabilities without upgrading

Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request

CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://git.kernel.org/stable/c/161d1aaeb04d620d3692639700512bb5038c1e10, https://git.kernel.org/stable/c/1e04be34cafae119e82bcaccd6d28a20f72a3647, https://git.kernel.org/stable/c/46eb17d45be69d28c7a23ea03283b207426a8232, https://git.kernel.org/stable/c/49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439, https://git.kernel.org/stable/c/5ec37edcb534f3fc92304be236d37f08e6545585, https://git.kernel.org/stable/c/8836405abdc53ca3dd5fc68b2cf6f8f012fad011, https://git.kernel.org/stable/c/9e18e83b8846a5c3fe13fc8a464b4865d33996c6, https://git.kernel.org/stable/c/c8a24effd96d4779e2ad779654682304491c55a5, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53398.json, https://nvd.nist.gov/vuln/detail/CVE-2026-53398, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00543%
EPSS Percentile
0.43436%
Introduced Version
5e76b25d7cc82c148d391c0c43b884e6427cb302,07b68ff5c71cf4ed5443016d8eb116863c0a4d88,3fdc546462348b8a497c72bc894e0cde9f10fc40,5.10.220,5.15.154,0,5.11.0,5.16.0,6.1.0,6.2.0,6.7.0,6.13.0
Fix Available
8836405abdc53ca3dd5fc68b2cf6f8f012fad011,49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439,9e18e83b8846a5c3fe13fc8a464b4865d33996c6,5.10.260,5.15.211,6.1.177,6.6.144,6.12.95,6.18.38,7.1.3,6.1.177-1,6.12.95-1,0:5.15.0-323.211.3.3.el8uek,0:6.12.0-206.104.3.3.el9uek,0:5.15.0-323.211.3.3.el9uek,0:6.12.0-206.104.3.3.el10uek,1:6.18.38-73.137.amzn2023,1:1.0-0.amzn2023,1:6.12.95-124.187.amzn2023,1:6.1.177-224.371.amzn2023,0:5.10.260-259.1053.amzn2,0:1.0-0.amzn2,0:5.15.211-149.249.amzn2

Fix Critical Vulnerabilities Instantly

Secure your app without upgrading.
Fix Without Upgrading