Description
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).
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < 57b47231055b431ed0a1a55f33cac32981564405affectede2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < cc2da381875d4a67026e4c8feb3dba51a2a2d1bcaffectede2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < 8fcefe840fa8c14ce667768e5b043286ac3bbcbeaffectede2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < 8ef183216feaa24b66b940510d8b68f680eb56e9affectede2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < 7164b3953cefd540e7ebca828c793bc6869cfbc4affectede2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < b46aa129fa2807bfe1545fe74d9295d53c51520baffectede2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < 3e298897f41c61450c2e7a4f457e8b2485eb35b3affected
Linux Linux
Default version status: affected
5.15affected0 to < 5.15unaffected5.15.209 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.141 to ≤ 6.6.*unaffected6.12.91 to ≤ 6.12.*unaffected6.18.33 to ≤ 6.18.*unaffected7.0.10 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/57b47231055b431ed0a1a55f33cac32981564405 ↗
- https://git.kernel.org/stable/c/cc2da381875d4a67026e4c8feb3dba51a2a2d1bc ↗
- https://git.kernel.org/stable/c/8fcefe840fa8c14ce667768e5b043286ac3bbcbe ↗
- https://git.kernel.org/stable/c/8ef183216feaa24b66b940510d8b68f680eb56e9 ↗
- https://git.kernel.org/stable/c/7164b3953cefd540e7ebca828c793bc6869cfbc4 ↗
- https://git.kernel.org/stable/c/b46aa129fa2807bfe1545fe74d9295d53c51520b ↗
- https://git.kernel.org/stable/c/3e298897f41c61450c2e7a4f457e8b2485eb35b3 ↗