CVE-2021-3444

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

0.61% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 48.9% 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

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

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

2021-03-23 17:45Z5 YR AGO

Last updated

2024-09-16 17:27Z2 YR AGO

Reserved

2021-03-16

Assigning CNA

canonical

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

• CWE-681Incorrect Conversion between Numeric TypesBase
• CWE-125Out-of-bounds ReadBase

Data version

5.1

Document digest

ae94f66aedd1f7558172970140c0841fd1a49d6bf0c8f6cc4bdbfdd73a13dfb0

• git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9b00f1b78809x_refsource_MISC
• www.openwall.comhttps://www.openwall.com/lists/oss-security/2021/03/23/2x_refsource_MISC
• www.openwall.com[oss-security] 20210323 [CVE-2021-3444] Linux kernel bpf verifier incorrect mod32 truncationhttp://www.openwall.com/lists/oss-security/2021/03/23/2mailing-listx_refsource_MLIST
• packetstormsecurity.comhttp://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.htmlx_refsource_MISC
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210416-0006/x_refsource_CONFIRM
• lists.debian.org[debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security updatehttps://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlmailing-listx_refsource_MLIST
• packetstormsecurity.comhttp://packetstormsecurity.com/files/164950/Kernel-Live-Patch-Security-Notice-LSN-0082-1.htmlx_refsource_MISC