CVE-2026-63803

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

0.13% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 3.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-08-17.

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

2026-07-19 12:02Z1 MO AGO

Last updated

2026-08-17 04:51Z18 DAYS AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

No CWE assigned

Data version

5.2

Document digest

9a81af91013477d6c4b21c6404eebc43eb9365b0c02fbb087de24e24457ad24a

• git.kernel.orghttps://git.kernel.org/stable/c/86d80a231bde4cfb64bfbfbfffd83056fc93628f
• git.kernel.orghttps://git.kernel.org/stable/c/8308122bc9c065b1f376e081ed300129a2ac9545
• git.kernel.orghttps://git.kernel.org/stable/c/ce8f9ddca0c9f217342a8b49efd309aa35b81a36
• git.kernel.orghttps://git.kernel.org/stable/c/508a0139d3bf60f6a03d2fbfb63a89a9463d983a
• git.kernel.orghttps://git.kernel.org/stable/c/c64dbef1c0fbd36f9530aa75112acdf6a6d3cfd8
• git.kernel.orghttps://git.kernel.org/stable/c/5a84398101bf9f11e84b176343e4e3ba83e668c0
• git.kernel.orghttps://git.kernel.org/stable/c/a594debfd4e7ec39413647458907f689ef57fd2f
• git.kernel.orghttps://git.kernel.org/stable/c/c78a4e41ab5ead6193ad8a2dd92e8906bae659fa