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debiancveDebian Security Bug TrackerDEBIANCVE:CVE-2023-52893
HistoryAug 21, 2024 - 7:15 a.m.

CVE-2023-52893

2024-08-2107:15:05
Debian Security Bug Tracker
security-tracker.debian.org
3
linux kernel
cve-2023-52893
null-deref vulnerability
gsmi
efi variables

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6.6

Confidence

High

EPSS

0

Percentile

5.1%

In the Linux kernel, the following vulnerability has been resolved: gsmi: fix null-deref in gsmi_get_variable We can get EFI variables without fetching the attribute, so we must allow for that in gsmi. commit 859748255b43 (“efi: pstore: Omit efivars caching EFI varstore access layer”) added a new get_variable call with attr=NULL, which triggers panic in gsmi.

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6.6

Confidence

High

EPSS

0

Percentile

5.1%