CVE-2026-53209

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 7.1% 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 2026-07-02.

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

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

• CWE-787Out-of-bounds WriteBase
• CWE-131Incorrect Calculation of Buffer SizeBase

Data version

5.2

Document digest

873171c0483dd2a41377f6595560212e82bd497999545e27e2f181650a6649a9

• git.kernel.orghttps://git.kernel.org/stable/c/10b0e832cc05d7aef4b92bed912cbd4a395d0862
• git.kernel.orghttps://git.kernel.org/stable/c/1338ee049a8910ba6c9cee963920e978e6893c7d
• git.kernel.orghttps://git.kernel.org/stable/c/02f50e8bb69f9b22516163a09922f5537d3b12d1
• git.kernel.orghttps://git.kernel.org/stable/c/dafc9f57140e66a10945127aa7433c3d715dc253
• git.kernel.orghttps://git.kernel.org/stable/c/cdd8bbdbee763fdf5bf343e6f7d4e79347739f62
• git.kernel.orghttps://git.kernel.org/stable/c/5c65b96b549ea2dcfde497436bf9e048deb87758