Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: wwan: t7xx: validate port_count against message length in t7xx_port_enum_msg_handler t7xx_port_enum_msg_handler() uses the modem-supplied port_count field as a loop bound over port_msg->data[] without checking that the message buffer contains sufficient data. A modem sending port_count=65535 in a 12-byte buffer triggers a slab-out-of-bounds read of up to 262140 bytes. Add a sizeof(*port_msg) check before accessing the port message header fields to guard against undersized messages. Add a struct_size() check after extracting port_count and before the loop. In t7xx_parse_host_rt_data(), guard the rt_feature header read with a remaining-buffer check before accessing data_len, validate feat_data_len against the actual remaining buffer to prevent OOB reads and signed integer overflow on offset. Pass msg_len from both call sites: skb->len at the DPMAIF path after skb_pull(), and the validated feat_data_len at the handshake path.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected da45d2566a1d4e260b894ff5d96be64b21c7fa79 before 307c5d0f36a5c74042217136da5bfbd9f7504650; affected da45d2566a1d4e260b894ff5d96be64b21c7fa79 before f94450ce5053b36002995b72d1fa1db3bb08c5bf; affected da45d2566a1d4e260b894ff5d96be64b21c7fa79 before 9855e063e063158cc5bded576382599dc3133202; affected da45d2566a1d4e260b894ff5d96be64b21c7fa79 before 2b56d7903ab804481f5233a259d5f341e9fd513c; affected da45d2566a1d4e260b894ff5d96be64b21c7fa79 before dd4f4c93c1488d7100b9964f2da4c8b3c29652f1; affected da45d2566a1d4e260b894ff5d96be64b21c7fa79 before 0e7c074cfcd9bd93765505f9eb8b42f03ed2a744 |
| Linux / Linux | affected 5.19; unaffected 0 before 5.19; unaffected 6.1.176 through 6.1.*; unaffected 6.6.140 through 6.6.*; unaffected 6.12.88 through 6.12.*; unaffected 6.18.30 through 6.18.*; unaffected 7.0.7 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/307c5d0f36a5c74042217136da5bfbd9f7504650
- https://git.kernel.org/stable/c/f94450ce5053b36002995b72d1fa1db3bb08c5bf
- https://git.kernel.org/stable/c/9855e063e063158cc5bded576382599dc3133202
- https://git.kernel.org/stable/c/2b56d7903ab804481f5233a259d5f341e9fd513c
- https://git.kernel.org/stable/c/dd4f4c93c1488d7100b9964f2da4c8b3c29652f1
- https://git.kernel.org/stable/c/0e7c074cfcd9bd93765505f9eb8b42f03ed2a744
ADP enrichment
No English description supplied.