How severe is CVE-2026-47331?

CVE-2026-47331 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-47331 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-47331?

CVE-2026-47331 primarily affects Canonical Ubuntu Linux. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-47331?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-47331 have an EU (EUVD) identifier?

Yes. CVE-2026-47331 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32986.

When was CVE-2026-47331 published?

CVE-2026-47331 was published on 2026-05-28 and last updated on 2026-06-17.

CVE-2026-47331

CVE-2026-47331 is a high-severity vulnerability in Canonical Ubuntu Linux with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-32986
Weakness: CWE-416
Affected product: Canonical Ubuntu Linux
Published: 2026-05-28
Last modified: 2026-06-17

Description

Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An unprivileged local user could trigger the race condition that can lead to a use-after-free (UAF) and, theoretically, arbitrary code execution.

Frequently asked questions

What is CVE-2026-47331?: Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An unprivileged local user could trigger the race condition that can lead to a use-after-free (UAF) and, theoretically, arbitrary code execution.
How severe is CVE-2026-47331?: CVE-2026-47331 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-47331 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-47331?: CVE-2026-47331 primarily affects Canonical Ubuntu Linux. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-47331?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-47331 have an EU (EUVD) identifier?: Yes. CVE-2026-47331 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32986.
When was CVE-2026-47331 published?: CVE-2026-47331 was published on 2026-05-28 and last updated on 2026-06-17.

References

https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=5e5cd4759b63363373faf1ce15d1cab3606d6ec8

Affected products (3)

cpe:2.3:o:canonical:ubuntu_linux:24.04:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:25.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:26.04:*:*:*:*:*:*:*

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