01 Record

CVE-2024-56640

net/smc: fix LGR and link use-after-free issue

CriticalPUBLISHEDCNA: Linux

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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02 Description

net/smc: fix LGR and link use-after-free issue

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

0.62% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 47.1% 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

2024-12-27 15:02Z1 YR AGO

Last updated

2026-08-05 11:45Z1 MO AGO

Reserved

2024-12-27

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-416Use After FreeVariant

Data version

5.2

Document digest

2e28066a8ba7583faa7d5b587916f33e14403efed157c1777ec459daa01f434c

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux3b2dec2603d5b06ad3af71c1164ca0b92df3d2a8 to < f502a88fdd415647a1f2dc45fac71b9c522a052b, 3b2dec2603d5b06ad3af71c1164ca0b92df3d2a8 to < 0cf598548a6c36d90681d53c6b77d52363f2f295, 3b2dec2603d5b06ad3af71c1164ca0b92df3d2a8 to < 673d606683ac70bc074ca6676b938bff18635226, 3b2dec2603d5b06ad3af71c1164ca0b92df3d2a8 to < 6f0ae06a234a78ae137064f2c89135ac078a00eb, 3b2dec2603d5b06ad3af71c1164ca0b92df3d2a8 to < 2c7f14ed9c19ec0f149479d1c2842ec1f9bf76d7, 4.18—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/f502a88fdd415647a1f2dc45fac71b9c522a052b
git.kernel.orghttps://git.kernel.org/stable/c/0cf598548a6c36d90681d53c6b77d52363f2f295
git.kernel.orghttps://git.kernel.org/stable/c/673d606683ac70bc074ca6676b938bff18635226
git.kernel.orghttps://git.kernel.org/stable/c/6f0ae06a234a78ae137064f2c89135ac078a00eb
git.kernel.orghttps://git.kernel.org/stable/c/2c7f14ed9c19ec0f149479d1c2842ec1f9bf76d7
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

01 Record index

CVE-2024-56640

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2024-56640

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References