CVE-2026-63992

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 41.6% of scored records. A rank, not a probability.

NVD base score

9.1 (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:N/A:H

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

2026-08-05 12:37Z29 DAYS AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.1)

CNA CVSS vector

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

Weaknesses

• CWE-805Buffer Access with Incorrect Length ValueBase

Data version

5.2

Document digest

7e1ae36342b00335066b215487e6be764505222ab8a5c0c90d7366f09008200a

• git.kernel.orghttps://git.kernel.org/stable/c/5a92cb45e34749865d03daf8d3500f77b5f6644c
• git.kernel.orghttps://git.kernel.org/stable/c/c7b7ec3e69e673c0d6b57f74d21da50c485c598e
• git.kernel.orghttps://git.kernel.org/stable/c/7f4f7efe7f30edd29c4988de01728bf2398217e4
• git.kernel.orghttps://git.kernel.org/stable/c/e917d0c69f01af2bb4fbea2b66d560a53b3ac7ec
• git.kernel.orghttps://git.kernel.org/stable/c/a096b6e34f602950af9a2b0856cd93a5f4c276d7
• git.kernel.orghttps://git.kernel.org/stable/c/43368636c663cff6e59dde93cf4b8e43ac28eb93
• git.kernel.orghttps://git.kernel.org/stable/c/cb549df9ce4ee15c9d5b19ddab12cf2128e4313c
• git.kernel.orghttps://git.kernel.org/stable/c/509323077ef79a26ba0c60bb556e45c12c398b2d