CVE-2026-53221

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.51% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 41.8% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-07-02.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-06-25 08:39Z2 MO AGO

Last updated

2026-08-05 12:34Z1 MO AGO

Reserved

2026-06-09

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-1289Improper Validation of Unsafe Equivalence in InputBase

Data version

5.2

Document digest

14df7d8fe9c2cb4a961b2648b10aa52851e4890cb5b779a5a3d30e4f0e030270

• git.kernel.orghttps://git.kernel.org/stable/c/c327fa4fca31415431202e063767a7ae342e19c6
• git.kernel.orghttps://git.kernel.org/stable/c/fc657ac0767c49839b3ef0b08dc0953ca30883f8
• git.kernel.orghttps://git.kernel.org/stable/c/47fb3c2b4203556308e64354b3e78f2ce221d646
• git.kernel.orghttps://git.kernel.org/stable/c/f513f308cc4bdb4530d033431592ffbc29b7fca1
• git.kernel.orghttps://git.kernel.org/stable/c/90fd4513315ca07da99cfd8549d3e553a7160f0d
• git.kernel.orghttps://git.kernel.org/stable/c/2abfb19bbb81958714ad1d43ebeb65b30394184b
• git.kernel.orghttps://git.kernel.org/stable/c/2fc7bc087cc7085368263d9d37bfe9a0bddd6a2d
• git.kernel.orghttps://git.kernel.org/stable/c/a5c0359f5cbc51a2e2b114d6041e0f3c73f903e9