CVE-2026-64564

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

1.48% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 72.0% of scored records. A rank, not a probability.

NVD base score

9.8 (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:H/A:H

NVD analysis status

Received. NVD last modified this record on 2026-08-19.

Red Hat severity

Important. 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

2026-08-04 06:23Z1 MO AGO

Last updated

2026-08-19 16:28Z16 DAYS AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

No CWE assigned

Data version

5.2

Document digest

15d01eb0cdad5167b4af5a6f3da0ee6d77d8deca7a07ed57cdda85e490bdab43

• git.kernel.orghttps://git.kernel.org/stable/c/a9ce31be4cb1a5dd82b3e0a1d0c3e7cbdcd31293
• git.kernel.orghttps://git.kernel.org/stable/c/a63afa1f9b12d5293cbe0b77fd45dc0632533a13
• git.kernel.orghttps://git.kernel.org/stable/c/2b324ba3494ae958cba16a453e3e71489b4de7fc
• git.kernel.orghttps://git.kernel.org/stable/c/fedeb4468987bcaff85fe3061de5ae052d414740
• git.kernel.orghttps://git.kernel.org/stable/c/74e8f3e7114f0e26d1b2c4c048044db9fcc27603
• git.kernel.orghttps://git.kernel.org/stable/c/85aca407c560aba81b5ce9d3d6cf94c74077d19b
• git.kernel.orghttps://git.kernel.org/stable/c/d136b29bf91dd8e3161281b87de597b7311d9462
• git.kernel.orghttps://git.kernel.org/stable/c/9b2854f86f0b56e9027d68e7a3fc909d1a9b566f
• matrix.tencent.comhttps://matrix.tencent.com/en/2026/08/06/sctphantom-CVE-2026-64564
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/08/06/3
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/08/06/4
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/08/06/13
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/08/07/1
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/08/07/2
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/08/07/8