01 Record

CVE-2026-31403

NFSD: Hold net reference for the lifetime of /proc/fs/nfs/exports fd

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

NFSD: Hold net reference for the lifetime of /proc/fs/nfs/exports fd

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.12% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 2.5% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-19.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-04-03 15:16Z6 MO AGO

Last updated

2026-10-19 18:35Z9 DAYS AGO

Reserved

2026-03-09

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-416Use After FreeVariant

Data version

5.2

Document digest

21aa089c9e820e1b4f49ff4ecd1327c999148405ce2574fbe4e06d48464ac5c3

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux96d851c4d28de8cc83fe2bd5c6bc2eb8f253a6c5 to < 76740c28050dc6db2f5550f1325b00a11bbb3255, 96d851c4d28de8cc83fe2bd5c6bc2eb8f253a6c5 to < c7f406fb341d6747634b8b1fa5461656e5e56076, 96d851c4d28de8cc83fe2bd5c6bc2eb8f253a6c5 to < d1a19217995df9c7e4118f5a2820c5032fef2945, 96d851c4d28de8cc83fe2bd5c6bc2eb8f253a6c5 to < e3d77f935639e6ae4b381c80464c31df998d61f4, 96d851c4d28de8cc83fe2bd5c6bc2eb8f253a6c5 to < db4a9f99b12a7ee1c19d86c83a3b752c7effa6c6, 96d851c4d28de8cc83fe2bd5c6bc2eb8f253a6c5 to < 6a8d70e2ad6aad2c345a5048edcb8168036f97d6, 96d851c4d28de8cc83fe2bd5c6bc2eb8f253a6c5 to < e7fcf179b82d3a3730fd8615da01b087cc654d0b, 3.9—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/76740c28050dc6db2f5550f1325b00a11bbb3255
git.kernel.orghttps://git.kernel.org/stable/c/c7f406fb341d6747634b8b1fa5461656e5e56076
git.kernel.orghttps://git.kernel.org/stable/c/d1a19217995df9c7e4118f5a2820c5032fef2945
git.kernel.orghttps://git.kernel.org/stable/c/e3d77f935639e6ae4b381c80464c31df998d61f4
git.kernel.orghttps://git.kernel.org/stable/c/db4a9f99b12a7ee1c19d86c83a3b752c7effa6c6
git.kernel.orghttps://git.kernel.org/stable/c/6a8d70e2ad6aad2c345a5048edcb8168036f97d6
git.kernel.orghttps://git.kernel.org/stable/c/e7fcf179b82d3a3730fd8615da01b087cc654d0b
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-457936.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.170-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.85-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.19.10-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.