Description
In the Linux kernel, the following vulnerability has been resolved: misc: nsm: bound the device-reported response length nsm_sendrecv_msg_locked() stores the virtqueue used-ring length reported by the NSM device into msg->resp.len without bounding it to the response buffer. A malicious or buggy backend can report a length larger than the response buffer; parse_resp_raw() then copies that many bytes out of the fixed buffer to user space, disclosing adjacent kernel heap (an out-of-bounds read). The request path already floors its length in fill_req_raw(); the response path lacks the symmetric check. Clamp the stored length to the size of the response buffer. Well-behaved devices report no more than the posted buffer size, so conforming traffic is unaffected.
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
b9873755a6c8ccfce79094c4dce9efa3ecb1a749 to < 339f19b9a6171289b0e797deb8bda80b9a1fcc30affectedb9873755a6c8ccfce79094c4dce9efa3ecb1a749 to < 29e634a18957acda11383a15ab98a91c4ae9e294affectedb9873755a6c8ccfce79094c4dce9efa3ecb1a749 to < 2aa0fb9c96f894a9c179a48e7522ea6705800adfaffectedb9873755a6c8ccfce79094c4dce9efa3ecb1a749 to < 808e530654a5354e6df78863a5d61e4d44e67235affected
Linux Linux
Default version status: affected
6.8affected0 to < 6.8unaffected6.12.109 to ≤ 6.12.*unaffected6.18.50 to ≤ 6.18.*unaffected7.2.4 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected