Bug 2348608 (CVE-2024-58008)

Summary: CVE-2024-58008 kernel: KEYS: trusted: dcp: fix improper sg use with CONFIG_VMAP_STACK=y
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-02-27 03:04:57 UTC 
In the Linux kernel, the following vulnerability has been resolved:

KEYS: trusted: dcp: fix improper sg use with CONFIG_VMAP_STACK=y

With vmalloc stack addresses enabled (CONFIG_VMAP_STACK=y) DCP trusted
keys can crash during en- and decryption of the blob encryption key via
the DCP crypto driver. This is caused by improperly using sg_init_one()
with vmalloc'd stack buffers (plain_key_blob).

Fix this by always using kmalloc() for buffers we give to the DCP crypto
driver.
Comment 1 Michal Findra 2025-02-27 19:12:43 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022656-CVE-2024-58008-548d@gregkh/T