Linux Kernel

CVE-2022-2586: Linux Kernel Use-After-Free Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 26 Jun 2024, 170 days after the CVE record was published.

How likely is exploitation in the next 30 days?

10.2%

EPSS score, percentile 95.7 of all scored records

How severe?

5.3 Medium

CVSS v3.1 base score, given by the CNA

What should I do?

CISA deadline 17 Jul 2024. Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

from 3.16 to before 4.14.316
from 4.15 to before 4.19.256
from 4.20 to before 5.4.211
from 5.5 to before 5.10.137
from 5.11 to before 5.15.61
from 5.16 to before 5.18.18

and 1 more in the table below

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

Required action, set by CISA

Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

CISA due date for this action: 17 July 2024.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

Affected products and versions

As listed in the CVE record.

The Linux Kernel Organization linux
Status	Versions
Affected	from 3.16 to before 4.14.316
Affected	from 4.15 to before 4.19.256
Affected	from 4.20 to before 5.4.211
Affected	from 5.5 to before 5.10.137
Affected	from 5.11 to before 5.15.61
Affected	from 5.16 to before 5.18.18
Affected	from 5.19 to before 5.19.2

Versions not listed are: unaffected.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Linux Kernel contains a use-after-free vulnerability in the nft_object, allowing local attackers to escalate privileges.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

CISA added CVE-2022-2586 to its Known Exploited Vulnerabilities (KEV) catalog on 26 Jun 2024.
CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
The due date CISA sets for the required action is 17 Jul 2024.
The CVE record was published on 8 Jan 2024, 170 days before it was added to KEV.
The CVE record carries a CVSS v3.1 base score of 5.3 (Medium), given by its CNA.
FIRST's EPSS model puts the probability of exploitation in the next 30 days at 10.2% (percentile 95.7), as of 28 Oct 2026.
CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

It was discovered that a nft object or expression could reference a nft set on a different nft table, leading to a use-after-free once that table was deleted.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

CWE-416

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

Date	Event
8 Jan 2024	CVE record published
26 Jun 2024	Added to CISA KEV
17 Jul 2024	CISA due date for the required action
14 Oct 2026	CVE record last updated

References

ubuntu.com (Third-party advisory)
ubuntu.com (Third-party advisory)
ubuntu.com (Third-party advisory)
ubuntu.com (Third-party advisory)
ubuntu.com (Third-party advisory)
ubuntu.com (Third-party advisory)
ubuntu.com (Third-party advisory)
ubuntu.com (Third-party advisory)
ubuntu.com (Third-party advisory)
openwall.com (Issue tracking)
zerodayinitiative.com (Issue tracking)
lore.kernel.org (Issue tracking)

1 more in the CVE record.

More exploited Linux vulnerabilities

CVE-2026-46300: Linux Kernel Missing Initialization of a Variable Vulnerability (added 28 Oct 2026)
CVE-2025-39682: Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability (added 18 Sep 2026)
CVE-2025-39964: Linux Kernel Race Condition Vulnerability (added 18 Sep 2026)
CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability (added 18 Sep 2026)
CVE-2026-53362: Linux Kernel Unspecified Vulnerability (added 27 Aug 2026)
CVE-2022-0995: Linux Kernel Out-of-Bounds Write Vulnerability (added 26 Aug 2026)