01 Record

CVE-2021-47341

KVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio

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

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02 Description

KVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio

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

0.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 16.8% 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

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 14:35Z2 YR AGO

Last updated

2026-08-05 08:47Z1 MO AGO

Reserved

2024-05-21

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-416Use After FreeVariant

Data version

5.2

Document digest

97d75a075568f60f735adf30f45c9aea1decad1b69b66b4054b0831927164a6b

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux7d1bc32d6477ff96a32695ea4be8144e4513ab2d to < f2ff9d03432fcb160e9f7d4be26174d89de2779a, 2a20592baff59c5351c5200ec667e1a2aa22af85 to < 679837dc0abaa2c6e2a7bcd86483e05eee1d5066, 50cbad42bfea8c052b7ca590bd4126cdc898713c to < 8d7c539316d652d217e5e82b89ee204c812a7061, 5d3c4c79384af06e3c8e25b7770b6247496b4417 to < 069d44a24c0ff8f85adf49233aae7a8ca16f5c7e, 5d3c4c79384af06e3c8e25b7770b6247496b4417 to < 23fa2e46a5556f787ce2ea1a315d3ab93cced204, 168e82f640ed1891a700bdb43e37da354b2ab63c, 5.4.119 to < 5.4.134, 5.10.37 to < 5.10.52, 5.12.4 to < 5.12.19, 5.11.21 to < 5.12, 5.13—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/f2ff9d03432fcb160e9f7d4be26174d89de2779a
git.kernel.orghttps://git.kernel.org/stable/c/679837dc0abaa2c6e2a7bcd86483e05eee1d5066
git.kernel.orghttps://git.kernel.org/stable/c/8d7c539316d652d217e5e82b89ee204c812a7061
git.kernel.orghttps://git.kernel.org/stable/c/069d44a24c0ff8f85adf49233aae7a8ca16f5c7e
git.kernel.orghttps://git.kernel.org/stable/c/23fa2e46a5556f787ce2ea1a315d3ab93cced204

01 Record index

CVE-2021-47341

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-47341

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References