In the Linux kernel, the following vulnerability has been resolved:
NFSD: Hold net reference for the lifetime of /proc/fs/nfs/exports fd
The /proc/fs/nfs/exports proc entry is created at module init
and persists for the module's lifetime. exports_proc_open()
captures the caller's current network namespace and stores
its svc_export_cache in seq->private, but takes no reference
on the namespace. If the namespace is subsequently torn down
(e.g. container destruction after the opener does setns() to a
different namespace), nfsd_net_exit() calls nfsd_export_shutdown()
which frees the cache. Subsequent reads on the still-open fd
dereference the freed cache_detail, walking a freed hash table.
Hold a reference on the struct net for the lifetime of the open
file descriptor. This prevents nfsd_net_exit() from running --
and thus prevents nfsd_export_shutdown() from freeing the cache
-- while any exports fd is open. cache_detail already stores
its net pointer (cd->net, set by cache_create_net()), so
exports_release() can retrieve it without additional per-file
storage.
References
Configurations
Configuration 1 (hide)
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History
20 May 2026, 12:15
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* |
|
| CWE | NVD-CWE-noinfo | |
| References | () https://git.kernel.org/stable/c/6a8d70e2ad6aad2c345a5048edcb8168036f97d6 - Patch | |
| References | () https://git.kernel.org/stable/c/76740c28050dc6db2f5550f1325b00a11bbb3255 - Patch | |
| References | () https://git.kernel.org/stable/c/c7f406fb341d6747634b8b1fa5461656e5e56076 - Patch | |
| References | () https://git.kernel.org/stable/c/d1a19217995df9c7e4118f5a2820c5032fef2945 - Patch | |
| References | () https://git.kernel.org/stable/c/db4a9f99b12a7ee1c19d86c83a3b752c7effa6c6 - Patch | |
| References | () https://git.kernel.org/stable/c/e3d77f935639e6ae4b381c80464c31df998d61f4 - Patch | |
| References | () https://git.kernel.org/stable/c/e7fcf179b82d3a3730fd8615da01b087cc654d0b - Patch |
27 Apr 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
18 Apr 2026, 09:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
03 Apr 2026, 16:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-03 16:16
Updated : 2026-05-20 12:15
NVD link : CVE-2026-31403
Mitre link : CVE-2026-31403
CVE.ORG link : CVE-2026-31403
JSON object : View
Products Affected
linux
- linux_kernel
CWE