01 Record

CVE-2021-47588

sit: do not call ipip6_dev_free() from sit_init_net()

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

sit: do not call ipip6_dev_free() from sit_init_net()

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 18.1% of scored records. A rank, not a probability.

NVD base score

5.5 (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:N/I:N/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

2024-06-19 14:53Z2 YR AGO

Last updated

2026-08-05 08:48Z1 MO AGO

Reserved

2024-05-24

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-911Improper Update of Reference CountBase

Data version

5.2

Document digest

997f18aba3f64d4c724139dacfcd57eeeadad225105f65885aa3ddd6369cb49c

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxcf124db566e6b036b8bcbe8decbed740bdfac8c6 to < 4e1797914d8f223726ff6ae5ece4f97d73f21bab, cf124db566e6b036b8bcbe8decbed740bdfac8c6 to < e56b65c1e74d7f706d74b51baba15187be2fb4b5, cf124db566e6b036b8bcbe8decbed740bdfac8c6 to < ad0ed314d6167b212939e3839428ba0c8bb16adb, cf124db566e6b036b8bcbe8decbed740bdfac8c6 to < 6f46c59e60b64620d5d386c8ee2eaa11ebe3b595, cf124db566e6b036b8bcbe8decbed740bdfac8c6 to < 44a6c846bc3a7efe7d394bab8b2ae3b7f580e190, cf124db566e6b036b8bcbe8decbed740bdfac8c6 to < e28587cc491ef0f3c51258fdc87fbc386b1d4c59, 95876855a55072572895a236b156ffb357fd5538, 4.11.9 to < 4.12, 4.12—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/4e1797914d8f223726ff6ae5ece4f97d73f21bab
git.kernel.orghttps://git.kernel.org/stable/c/e56b65c1e74d7f706d74b51baba15187be2fb4b5
git.kernel.orghttps://git.kernel.org/stable/c/ad0ed314d6167b212939e3839428ba0c8bb16adb
git.kernel.orghttps://git.kernel.org/stable/c/6f46c59e60b64620d5d386c8ee2eaa11ebe3b595
git.kernel.orghttps://git.kernel.org/stable/c/44a6c846bc3a7efe7d394bab8b2ae3b7f580e190
git.kernel.orghttps://git.kernel.org/stable/c/e28587cc491ef0f3c51258fdc87fbc386b1d4c59

01 Record index

CVE-2021-47588

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-47588

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References