CVE-2026-31478

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

0.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 40.6% 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

Analyzed. NVD last modified this record on 2026-06-17.

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

2026-04-22 13:54Z4 MO AGO

Last updated

2026-08-05 12:22Z1 MO AGO

Reserved

2026-03-09

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

• CWE-131Incorrect Calculation of Buffer SizeBase

Data version

5.2

Document digest

c667e60b67785b1659d1d91fe317a8f77f4e5c3ee101f7ea15c11715836cc67b

• git.kernel.orghttps://git.kernel.org/stable/c/70b4c414889492c522b6e4331562360f49be2361
• git.kernel.orghttps://git.kernel.org/stable/c/9a7166f0ef8cbb7bb48dd05e2471d995566003f5
• git.kernel.orghttps://git.kernel.org/stable/c/c3a89e3ec1ccf64fa6a34e391e1581ebbcba8683
• git.kernel.orghttps://git.kernel.org/stable/c/6aef1765d6807e0f027cd87f6ac973eb0879a46d
• git.kernel.orghttps://git.kernel.org/stable/c/80824c7e527b70cf9039534e60aff592e8f209d1
• git.kernel.orghttps://git.kernel.org/stable/c/4cb537ae4f37d7d0f617815ed4bed7173fb50861
• git.kernel.orghttps://git.kernel.org/stable/c/0e55f63dd08f09651d39e1b709a91705a8a0ddcb