7.5

CVE-2026-90149: linux

CVSS: 7.5v3.1HighReceived
AliasesUBUNTU-CVE-2026-90149DEBIAN-CVE-2026-90149
Published 17-09-2026Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2026-90149 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.59% chance of exploitation in the next 30 days, higher than 47.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.59%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 11 · Related 11
OPENSUSE-SU-2026:11893-1OPENSUSE-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/flexfiles: fix NULL dereference for NFSv4.0 data servers flexfiles accepts NFSv4.0 data servers, but two NFSv4 code paths assume the data server client has a session. Unlike NFSv4.1+, an NFSv4.0 client has no session (clp->cl_session is NULL; it uses clp->cl_slot_tbl), so I/O to a v4.0 flexfiles DS oopses: - nfs4_init_ds_session() dereferences clp->cl_session->session_state while seeding the DS lease. It also only seeds cl_lease_time when NFS4_SESSION_INITING is set; without a session that never happens, so cl_lease_time stays 0 and nfs4_renew_state() busy-loops, requeuing every 5 seconds. Seed the lease whenever there is no session and return before touching session state. - ff_layout_async_handle_error_v4() dereferences clp->cl_session->fc_slot_table on every DS I/O error. Fall back to the v4.0 transport slot table (clp->cl_slot_tbl) when there is no session.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.59%

Chance of exploitation in the next 30 days

Percentile

48%

Versus all other CVEs

30-day change

+0.02 pp

From 0.58% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.59%

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

Ubuntu168 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≥ a7878ca140084ec267ede48fce64d7e60f6d873e, < 336b6da10021c69a8f273bbacdf7432fdc89a06f | ≥ a7878ca140084ec267ede48fce64d7e60f6d873e, < 5527af72b0100c94287bfec901b6313eeac567ca | ≥ a7878ca140084ec267ede48fce64d7e60f6d873e, < 163c16e01f53fc8eb8d0f3484ae6c382265ecbbd | ≥ a7878ca140084ec267ede48fce64d7e60f6d873e, < 436a214514e24103159aea455147d58b44a8a585 | ≥ a7878ca140084ec267ede48fce64d7e60f6d873e, < 2b03ebbf8d5e8f6af4ecd6c65375232dd1ec32cc | 4.12

3 vendors · 170 products

References

9 links