Linux · Security advisory · April 18, 2024

ALSA-2024:1903: Security update for 2 packages

ALSA-2024:1903, released April 18, 2024, fixes 6 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent
CVEs closed
6
1 rated Critical
Exploited
0
None reported
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0542
92nd percentile

Priority of the 6 CVEs

Patch now 0 Urgent 1 High 1 Routine 4

Fixed package versions

ProductReleaseFixed in
shim-aa64almalinux 915.8-4.el9_3.alma.1
shim-x64almalinux 915.8-4.el9_3.alma.1

CVEs this fix closes

PriorityCVETitleImpactCVSSEPSSExploitation
Urgent CVE-2023-40547 Redhat: CVE-2023-40547 Shim - RCE in HTTP boot support may lead to secure boot bypass 8.3 0.0542 Exploitation Less Likely
High CVE-2023-40548 shim: A buffer overflow was found in Shim in the 32-bit system 7.4 0.0044 None reported
Routine CVE-2023-40546 shim: A flaw was found in Shim when an error happened while creating a new ESL variable 6.2 0.0044 None reported
Routine CVE-2023-40549 shim: An out-of-bounds read flaw was found in Shim due to the lack of properboundary verification during the load of a PE b... 6.2 0.0041 None reported
Routine CVE-2023-40550 shim: An out-of-bounds read flaw was found in Shim when it tried to validate theSBAT information 5.5 0.0040 None reported
Routine CVE-2023-40551 shim: A flaw was found in the MZ binary format in Shim 5.1 0.0040 None reported
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