Bug 2424963 (CVE-2023-54029)

Summary: CVE-2023-54029 kernel: wifi: iwlwifi: fix iwl_mvm_max_amsdu_size() for MLO
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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A NULL pointer dereference vulnerability was found in the Intel iwlwifi wireless driver in the Linux kernel. When using Multi-Link Operation (MLO) mode, the iwl_mvm_max_amsdu_size() function incorrectly accesses vif->bss_conf.chandef.chan->band, which leads to a NULL pointer dereference because bss_conf is not used in MLO configurations.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2025-12-24 12:04:10 UTC 
In the Linux kernel, the following vulnerability has been resolved:

wifi: iwlwifi: fix iwl_mvm_max_amsdu_size() for MLO

For MLO, we cannot use vif->bss_conf.chandef.chan->band, since
that will lead to a NULL-ptr dereference as bss_conf isn't used.
However, in case of real MLO, we also need to take both LMACs
into account if they exist, since the station might be active
on both LMACs at the same time.
Comment 1 Alexander B 2025-12-25 12:34:24 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025122436-CVE-2023-54029-0d67@gregkh/T