01 Record

CVE-2023-52976

efi: fix potential NULL deref in efi_mem_reserve_persistent

MediumPUBLISHEDCNA: Linux

CNA base score5.5 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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02 Description

efi: fix potential NULL deref in efi_mem_reserve_persistent

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

0.28% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 20.0% 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 2026-06-17.

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

2025-03-27 16:43Z1 YR AGO

Last updated

2026-05-23 15:27Z3 MO AGO

Reserved

2025-03-27

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

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

Weaknesses

CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

d6ddd75b1f2bb0958b3eb57e3b5a3ee8316af88af52c2714d07ca1c68d64d6a9

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux18df7577adae6c6c778bf774b3aebcacbc1fb439 to < d92a25627bcdf264183670da73c9a60c0bac327e, 18df7577adae6c6c778bf774b3aebcacbc1fb439 to < 87d4ff18738fd71e7e3c10827c80257da6283697, 18df7577adae6c6c778bf774b3aebcacbc1fb439 to < d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23c, 18df7577adae6c6c778bf774b3aebcacbc1fb439 to < a2e6a9ff89f13666a1c3ff7195612ab949ea9afc, 18df7577adae6c6c778bf774b3aebcacbc1fb439 to < 966d47e1f27c45507c5df82b2a2157e5a4fd3909, b5961ecad7121fec138ebee7d9eba4863f9dc6e7, 5.1.16 to < 5.2, 5.2—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/d92a25627bcdf264183670da73c9a60c0bac327e
git.kernel.orghttps://git.kernel.org/stable/c/87d4ff18738fd71e7e3c10827c80257da6283697
git.kernel.orghttps://git.kernel.org/stable/c/d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23c
git.kernel.orghttps://git.kernel.org/stable/c/a2e6a9ff89f13666a1c3ff7195612ab949ea9afc
git.kernel.orghttps://git.kernel.org/stable/c/966d47e1f27c45507c5df82b2a2157e5a4fd3909

01 Record index

CVE-2023-52976

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2023-52976

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References