9.8

CVE-2026-90104: linux

CVSS: 9.8v3.1CriticalReceived
AliasesUBUNTU-CVE-2026-90104DEBIAN-CVE-2026-90104
Published 17-09-2026Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2026-90104 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.61% chance of exploitation in the next 30 days, higher than 48.7% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.61%
0%100%
Low · +0.10 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 17 · Related 17
OPENSUSE-SU-2026:11880-1OPENSUSE-SU-2026:22091-1SUSE-SU-2026:24179-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:24184-1

Timeline

  1. 17-09-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: NFSv4.1: zero referring call lists before decoding decode_cb_sequence_args() allocates csa_rclists with kmalloc_objs(), so each referring_call_list starts uninitialized. decode_rc_list() assigns rcl_refcalls only when rcl_nrefcalls is nonzero. A valid list with zero referring calls therefore leaves the pointer uninitialized, and nfs4_callback_sequence() later passes stale slab contents to kfree(). Allocate csa_rclists with kzalloc_objs() so every rcl_refcalls member is NULL from the beginning, including valid empty referring call lists.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.61%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

+0.10 pp

From 0.52% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.61%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu169 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linuxAll versions (No fix recorded) | < 7.2.6-1
Linux1 product
  • linux≥ 4aece6a19cf7f474f15eb861ba74db4479884ce3, < ed54460caf5b5aa65ec03c9a6032d831f39f19f5 | ≥ 4aece6a19cf7f474f15eb861ba74db4479884ce3, < 7510a5b9edec9d9536a4e69f10edfb2592e6cf7f | ≥ 4aece6a19cf7f474f15eb861ba74db4479884ce3, < f4d23937e1c41995c2f54af26c89b5e48a41c299 | ≥ 4aece6a19cf7f474f15eb861ba74db4479884ce3, < f31f3c042e024aef437cda42f0424ae8d4594b6c | ≥ 4aece6a19cf7f474f15eb861ba74db4479884ce3, < 8fa4804fe62ca4155a2d8fc2789d630376cbf2fc | 2.6.31

3 vendors · 171 products

References

9 links