PT-2026-51940 · Linux · Linux

Publicado

2026-06-24

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Atualizado

2026-06-24

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CVE-2026-53046

Nenhuma

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In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine
ksmbd crypt message() sets a NULL completion callback on AEAD requests and does not handle the -EINPROGRESS return code from async hardware crypto engines like the Qualcomm Crypto Engine (QCE). When QCE returns -EINPROGRESS, ksmbd treats it as an error and immediately frees the request while the hardware DMA operation is still in flight. The DMA completion callback then dereferences freed memory, causing a NULL pointer crash:
pc : qce skcipher done+0x24/0x174 lr : vchan complete+0x230/0x27c ... el1h 64 irq+0x68/0x6c ksmbd free work struct+0x20/0x118 [ksmbd] ksmbd exit file cache+0x694/0xa4c [ksmbd]
Use the standard crypto wait req() pattern with crypto req done() as the completion callback, matching the approach used by the SMB client in fs/smb/client/smb2ops.c. This properly handles both synchronous engines (immediate return) and async engines (-EINPROGRESS followed by callback notification).
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Identificadores relacionados

CVE-2026-53046

Produtos afetados

Linux