01 Record

CVE-2021-47277

kvm: avoid speculation-based attacks from out-of-range memslot accesses

UnratedPUBLISHEDCNA: Linux

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 Description

kvm: avoid speculation-based attacks from out-of-range memslot accesses

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 17.6% of scored records. A rank, not a probability.

NVD base score

7.1 (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:N/A:H

NVD analysis status

Analyzed. 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.

04 Metadata

Published

2024-05-21 14:20Z2 YR AGO

Last updated

2026-05-11 13:51Z3 MO AGO

Reserved

2024-05-21

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-125Out-of-bounds ReadBase
CWE-118Incorrect Access of Indexable Resource ('Range Error')Class

Data version

5.2

Document digest

7d5b584aa9afd1a00b9c9a8351bd5868afbbd9a20973c966d915848d6ea28084

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux8a7ae055f3533b520401c170ac55e30628b34df5 to < 3098b86390a6b9ea52657689f08410baf130ceff, 8a7ae055f3533b520401c170ac55e30628b34df5 to < 740621309b25bbf619b8a0ba5fd50a8e58989441, 8a7ae055f3533b520401c170ac55e30628b34df5 to < 361ce3b917aff93123e9e966d8608655c967f438, 8a7ae055f3533b520401c170ac55e30628b34df5 to < 22b87fb17a28d37331bb9c1110737627b17f6781, 8a7ae055f3533b520401c170ac55e30628b34df5 to < bff1fbf0cf0712686f1df59a83fba6e31d2746a0, 8a7ae055f3533b520401c170ac55e30628b34df5 to < 7af299b97734c7e7f465b42a2139ce4d77246975, 8a7ae055f3533b520401c170ac55e30628b34df5 to < ed0e2a893092c7fcb4ff7ba74e5efce53a6f5940, 8a7ae055f3533b520401c170ac55e30628b34df5 to < da27a83fd6cc7780fea190e1f5c19e87019da65c, 2.6.25—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/3098b86390a6b9ea52657689f08410baf130ceff
git.kernel.orghttps://git.kernel.org/stable/c/740621309b25bbf619b8a0ba5fd50a8e58989441
git.kernel.orghttps://git.kernel.org/stable/c/361ce3b917aff93123e9e966d8608655c967f438
git.kernel.orghttps://git.kernel.org/stable/c/22b87fb17a28d37331bb9c1110737627b17f6781
git.kernel.orghttps://git.kernel.org/stable/c/bff1fbf0cf0712686f1df59a83fba6e31d2746a0
git.kernel.orghttps://git.kernel.org/stable/c/7af299b97734c7e7f465b42a2139ce4d77246975
git.kernel.orghttps://git.kernel.org/stable/c/ed0e2a893092c7fcb4ff7ba74e5efce53a6f5940
git.kernel.orghttps://git.kernel.org/stable/c/da27a83fd6cc7780fea190e1f5c19e87019da65c

01 Record index

CVE-2021-47277

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-47277

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References