Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU nvmet_tcp_try_recv_pdu() reads a PDU header into the fixed 128-byte queue->pdu union, then computes the remaining payload length as queue->left = hdr->hlen - queue->offset + hdgst; and reads that many more bytes into &queue->pdu + queue->offset, without ever bounding the result against sizeof(queue->pdu). A struct nvme_tcp_icreq_pdu is itself 128 bytes, exactly the size of the union. Once a header digest has been negotiated (hdgst = 4), a second ICReq passes the hlen == nvmet_tcp_pdu_size() check but yields queue->left = 128 - 8 + 4 = 124, so bytes 8..132 are written into the 128-byte buffer -- 4 bytes past its end, over queue->hdr_digest and queue->data_digest. Those bytes are attacker-controlled (an ICReq carries no digest), and the duplicate ICReq is only rejected later, after the overflow. A remote unauthenticated host can thus corrupt kernel memory adjacent to the receive buffer. Reject any PDU whose declared length would read past the end of queue->pdu before the second recv.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before a3f0bcfbaf3312a5754d1ce020a07d394669eb25; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before 4f84d42c53c49557fb1ef285c683b0a81b576c74; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before 58dc6035b79c4c73c0cbf9ec9f68a7f117b2b3e6; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before cf5f39d2b58f97e0cd1829c4a6aeef17f1607cca; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before 3a385e0c39efbe34db8edd95900c123113ae3450; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before dbc4acbdb3ca8c81441368ad7409b8f77d4de8f6; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before d95d342bc0ea82dc79e6362b2f1f997431750e4c; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before 14cc5a7e77731497d5bea70f3bb05df7eda982e4 |
| Linux / Linux | affected 5.0; unaffected 0 before 5.0; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a3f0bcfbaf3312a5754d1ce020a07d394669eb25
- https://git.kernel.org/stable/c/4f84d42c53c49557fb1ef285c683b0a81b576c74
- https://git.kernel.org/stable/c/58dc6035b79c4c73c0cbf9ec9f68a7f117b2b3e6
- https://git.kernel.org/stable/c/cf5f39d2b58f97e0cd1829c4a6aeef17f1607cca
- https://git.kernel.org/stable/c/3a385e0c39efbe34db8edd95900c123113ae3450
- https://git.kernel.org/stable/c/dbc4acbdb3ca8c81441368ad7409b8f77d4de8f6
- https://git.kernel.org/stable/c/d95d342bc0ea82dc79e6362b2f1f997431750e4c
- https://git.kernel.org/stable/c/14cc5a7e77731497d5bea70f3bb05df7eda982e4