01 Record

CVE-2021-46984

kyber: fix out of bounds access when preempted

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

kyber: fix out of bounds access when preempted

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.26% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 17.3% 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 2026-08-04.

Red Hat severity

Low. 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.

04 Metadata

Published

2024-02-28 08:13Z2 YR AGO

Last updated

2026-08-05 08:45Z1 MO AGO

Reserved

2024-02-27

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-129Improper Validation of Array IndexVariant
CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

b8330939fbffa5ce1d010c82b34d6c985084d58b461840d5a74c51366c5d4619

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxa6088845c2bf754d6cb2572b484180680b037804 to < 0b6b4b90b74c27bea968c214d820ba4254b903a5, a6088845c2bf754d6cb2572b484180680b037804 to < 54dbe2d2c1fcabf650c7a8b747601da355cd7f9f, a6088845c2bf754d6cb2572b484180680b037804 to < a287cd84e047045f5a4d4da793414e848de627c6, a6088845c2bf754d6cb2572b484180680b037804 to < 2ef3c76540c49167a0bc3d5f80d00fd1fc4586df, a6088845c2bf754d6cb2572b484180680b037804 to < efed9a3337e341bd0989161b97453b52567bc59d, 4.18—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/0b6b4b90b74c27bea968c214d820ba4254b903a5
git.kernel.orghttps://git.kernel.org/stable/c/54dbe2d2c1fcabf650c7a8b747601da355cd7f9f
git.kernel.orghttps://git.kernel.org/stable/c/a287cd84e047045f5a4d4da793414e848de627c6
git.kernel.orghttps://git.kernel.org/stable/c/2ef3c76540c49167a0bc3d5f80d00fd1fc4586df
git.kernel.orghttps://git.kernel.org/stable/c/efed9a3337e341bd0989161b97453b52567bc59d

01 Record index

CVE-2021-46984

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-46984

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References