APPLIED[HWE-6.17/J]/Cmnt: [SRU][Q/J][PATCH 0/2] CVE-2026-52989

[Stefan Bader]

On 16/07/2026 19:15, Cengiz Can via kernel-team wrote:
> https://ubuntu.com/security/CVE-2026-52989
> 
> [ Impact ]
> 
> When nvmet_tcp_build_pdu_iovec() detects an out-of-bounds PDU length or offset,
> it triggers a fatal error and returns early, but because the function returns
> void, its callers are unaware the error occurred and that
> cmd->recv_msg.msg_iter was left uninitialized. Callers such as
> nvmet_tcp_handle_h2c_data_pdu() proceed to overwrite the queue state with
> NVMET_TCP_RECV_DATA, causing the socket receive loop to read incoming network
> data into an uninitialized iterator. This affects the NVMe-over-TCP target and
> can be remotely triggered, with a CVSS score of 9.8.
> 
> [ Fix ]
> 
> questing: clean cherry-pick
> jammy: backported with AI-assisted adaptation
> focal: backported with AI-assisted adaptation
> 
> [ Test Plan ]
> 
> Boot tested.
> 
> [ Where Problems Could Occur ]
> 
> A regression in this fix could affect the nvmet-tcp (NVMe target over TCP)
> subsystem, potentially causing incorrect error handling of H2C data PDUs or
> premature connection teardown for otherwise valid traffic.
> 

Applied to noble:linux-hwe-6.17/hwe-6.17-next and 
jammy:linux/master-next. Thanks.

-Stefan
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