ACK: [SRU][Q][PATCH 0/1] CVE-2026-53046

[Edoardo Canepa]

Acked-by: Edoardo Canepa <edoardo.canepa at canonical.com>

On 7/17/26 00:57, Cengiz Can via kernel-team wrote:
> https://ubuntu.com/security/CVE-2026-53046
>
> [ Impact ]
>
> 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 use-after-free and NULL pointer crash. This can lead to
> a remote crash or potential memory corruption on affected systems.
>
> [ Fix ]
>
> questing: clean cherry-pick
>
> [ Test Plan ]
>
> Boot tested.
>
> [ Where Problems Could Occur ]
>
> A regression would manifest in the ksmbd SMB3 server, affecting encrypted
> connections that rely on AEAD crypto requests. If the fix is incorrect, it
> could cause hangs or crashes during message encryption/decryption, particularly
> on systems using async hardware crypto engines.
>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_0x20F88172E14F6784.asc
Type: application/pgp-keys
Size: 3167 bytes
Desc: OpenPGP public key
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20260729/eb772514/attachment.key>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_signature.asc
Type: application/pgp-signature
Size: 840 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20260729/eb772514/attachment.sig>