01 Record

CVE-2021-47640

powerpc/kasan: Fix early region not updated correctly

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

powerpc/kasan: Fix early region not updated correctly

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 ImpacttotalSuccessful exploitation gives total 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 17.2% 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

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.

04 Metadata

Published

2025-02-26 01:54Z1 YR AGO

Last updated

2026-05-23 15:20Z3 MO AGO

Reserved

2025-02-26

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

Data version

5.2

Document digest

26cee81512153f099a7505b226f2f2c58a008febcc9c154677b1fb5724feb783

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxcbd18991e24fea2c31da3bb117c83e4a3538cd11 to < 7f19245c3647afea8c7c41f795506ef70f64b9f2, cbd18991e24fea2c31da3bb117c83e4a3538cd11 to < f39a3309393a4a484532f6ba745c6acbcfe06115, cbd18991e24fea2c31da3bb117c83e4a3538cd11 to < 5a3d8f3192a409893c57808cc935e16484df1068, cbd18991e24fea2c31da3bb117c83e4a3538cd11 to < de56beace6648065d404cd9835aa7d30e3df519d, cbd18991e24fea2c31da3bb117c83e4a3538cd11 to < e3d157a4b4f4e0268c98be5b7013bf4b31234bb6, cbd18991e24fea2c31da3bb117c83e4a3538cd11 to < dd75080aa8409ce10d50fb58981c6b59bf8707d3, 3822dd8c102d11ada9d9ed8e04cad0b347a04689, 5.3.6 to < 5.4, 5.4—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/7f19245c3647afea8c7c41f795506ef70f64b9f2
git.kernel.orghttps://git.kernel.org/stable/c/f39a3309393a4a484532f6ba745c6acbcfe06115
git.kernel.orghttps://git.kernel.org/stable/c/5a3d8f3192a409893c57808cc935e16484df1068
git.kernel.orghttps://git.kernel.org/stable/c/de56beace6648065d404cd9835aa7d30e3df519d
git.kernel.orghttps://git.kernel.org/stable/c/e3d157a4b4f4e0268c98be5b7013bf4b31234bb6
git.kernel.orghttps://git.kernel.org/stable/c/dd75080aa8409ce10d50fb58981c6b59bf8707d3

01 Record index

CVE-2021-47640

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-47640

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References