CVE-2026-63873

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

0.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 10.6% of scored records. A rank, not a probability.

NVD base score

The NVD has published no score for this record

NVD CVSS vector

No NVD score to derive

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-07-27.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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 14:18Z1 MO AGO

Last updated

2026-07-19 14:18Z1 MO AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-911Improper Update of Reference CountBase

Data version

5.2

Document digest

24a289f627382a97f15fb9b3acd5e7c11053b1fc62a9c25f2c366c7aed16303c

• git.kernel.orghttps://git.kernel.org/stable/c/e83fc4c28226be75fbc0c41f2846935ba2b5f949
• git.kernel.orghttps://git.kernel.org/stable/c/21dfec59939120b20d2c7794caaa421f9450be0a
• git.kernel.orghttps://git.kernel.org/stable/c/2f41af638c92bac6f1f9275ea2d1901baef578f3