Description
In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix host memory disclosure on R2T for a read command nvme_tcp_handle_r2t() does not check the direction of the request the R2T refers to. A malicious controller can send an R2T for a READ and the host will answer it: nvme_tcp_setup_h2c_data_pdu() builds the H2CData header and nvme_tcp_try_send_data() sends the request's data buffer. That buffer is the READ destination, so its contents go to the controller. The command then completes normally and nothing is logged. Against a test controller that answers every READ with an R2T, a 4096 byte buffered read returned all 4096 bytes, split over two R2Ts. The pages contained stale kernel data, including an array of struct page pointers. Reject an R2T for a request that is not a write.
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
3f2304f8c6d6ed97849057bd16fee99e434ca796 to < 49a4dcf57608ebf6432dbcb203ed25e7ed581445affected3f2304f8c6d6ed97849057bd16fee99e434ca796 to < bc4013c7cce58d46f792c8c87bc8c8318a70190eaffected3f2304f8c6d6ed97849057bd16fee99e434ca796 to < a4c3c7310156493797c920b10d8648c07aa05403affected3f2304f8c6d6ed97849057bd16fee99e434ca796 to < 3b3d27670c0c890ba7cf1bc3614cab61bde6d25caffected3f2304f8c6d6ed97849057bd16fee99e434ca796 to < 3a0b05145053a5fad1a2ddb4e4d87b07385e63e5affected3f2304f8c6d6ed97849057bd16fee99e434ca796 to < 6efbc52237facda35d2d874fe1765bb4839275d8affected
Linux Linux
Default version status: affected
5.0affected0 to < 5.0unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.109 to ≤ 6.12.*unaffected6.18.50 to ≤ 6.18.*unaffected7.2.4 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/49a4dcf57608ebf6432dbcb203ed25e7ed581445 ↗
- https://git.kernel.org/stable/c/bc4013c7cce58d46f792c8c87bc8c8318a70190e ↗
- https://git.kernel.org/stable/c/a4c3c7310156493797c920b10d8648c07aa05403 ↗
- https://git.kernel.org/stable/c/3b3d27670c0c890ba7cf1bc3614cab61bde6d25c ↗
- https://git.kernel.org/stable/c/3a0b05145053a5fad1a2ddb4e4d87b07385e63e5 ↗
- https://git.kernel.org/stable/c/6efbc52237facda35d2d874fe1765bb4839275d8 ↗