9.8

CVE-2026-89972: linux

CVSS: 9.8v3.1CriticalReceived
AliasesUBUNTU-CVE-2026-89972DEBIAN-CVE-2026-89972
Published 16-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-89972 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.64% chance of exploitation in the next 30 days, higher than 49.4% 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
0.64%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 1
MGASA-2026-0506OPENSUSE-SU-2026:11880-1RHSA-2026:75746RHSA-2026:75747RHSA-2026:76739

Timeline

  1. 16-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: nvme: add missing SRCU grace period in error path nvme_alloc_ns() error path at out_unlink_ns removes ns from the namespace head siblings list with list_del_rcu(&ns->siblings) but does not wait for SRCU readers before freeing the namespace struct. Multipath code iterates the head->list under srcu_read_lock() in nvme_find_path() and nvme_mpath_revalidate_paths(), so a concurrent reader can still hold a reference to ns when kfree(ns) runs. The normal removal path in nvme_ns_remove() correctly calls synchronize_srcu(&ns->head->srcu) after list_del_rcu() to wait for in-progress readers. Add the same grace period in the error path.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.64%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

+0.04 pp

From 0.60% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.64%

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) | < 6.12.113-1 | < 7.2.6-1
Linux1 product
  • linux≥ ed754e5deeb17f4e675c84e4b6c640cc7344e498, < 0d4735418512ef825176726eaaa8bd6a35f6b46d | ≥ ed754e5deeb17f4e675c84e4b6c640cc7344e498, < d663944dbad81bb0e3635d7090db4713e6300858 | ≥ ed754e5deeb17f4e675c84e4b6c640cc7344e498, < 76023560d60f10b4f808941163aa2975f1631683 | ≥ ed754e5deeb17f4e675c84e4b6c640cc7344e498, < ef248d5de4469fb6bbaf8dbe0c4c47800080d648 | 4.15

3 vendors · 170 products

References

8 links