CVE-2024-33619

MEDIUM5.5

efi: libstub: only free priv.runtime_map when allocated

Published Jun 21, 2024

Modified 8 months ago

Details

In the Linux kernel, the following vulnerability has been resolved:

efi: libstub: only free priv.runtime_map when allocated

priv.runtime_map is only allocated when efi_novamap is not set. Otherwise, it is an uninitialized value. In the error path, it is freed unconditionally. Avoid passing an uninitialized value to free_pool. Free priv.runtime_map only when it was allocated.

This bug was discovered and resolved using Coverity Static Analysis Security Testing (SAST) by Synopsys, Inc.

References

WEBhttps://git.kernel.org/stable/c/4b2543f7e1e6b91cfc8dd1696e3cdf01c3ac8974 WEBhttps://git.kernel.org/stable/c/6ca67a5fe1c606d1fbe24c30a9fc0bdc43a18554 WEBhttps://git.kernel.org/stable/c/9dce01f386c9ce6990c0a83fa14b1c95330b037e WEBhttps://git.kernel.org/stable/c/b8938d6f570f010a1dcdbfed3e5b5d3258c2a908 ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2024-33619

CVSS Analysis

CVSS v3.1

5.5

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

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

Ecosystems

Timeline

PublishedJun 21, 2024

ModifiedMay 4, 2025