CVE-2026-63991

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

0.18% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 7.3% 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 2026-07-30.

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 14:56Z1 MO AGO

Last updated

2026-07-19 14:56Z1 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-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

8b85a7d54dbaccf7cc8a5b0736fd595334c4929b2a70f025f5032595e6c5a9fe

• git.kernel.orghttps://git.kernel.org/stable/c/9afcb5ea080af13aab37930da627db43bd277665
• git.kernel.orghttps://git.kernel.org/stable/c/9903a04becf059e44cccf625e23689b7d4378384
• git.kernel.orghttps://git.kernel.org/stable/c/d630c4b25f36e0e68461561e4c70957ec37fdedd
• git.kernel.orghttps://git.kernel.org/stable/c/b06203ac5f12929d79146bb9f063c2af1d679e63
• git.kernel.orghttps://git.kernel.org/stable/c/3d5d81d294ba09487c86bc4ba33dc4a4bec5d215
• git.kernel.orghttps://git.kernel.org/stable/c/e673889a35a5e4c586d0fae67d8755ca4367d3e2
• git.kernel.orghttps://git.kernel.org/stable/c/2061d080a013c0ec0a56162cd501fb36d2befc26
• git.kernel.orghttps://git.kernel.org/stable/c/3c40d381ce04f9575a5d8b542898183c3b4b38dc