{"id":"CVE-2026-89846","published":"2026-09-16T11:16:51.853","lastModified":"2026-09-16T15:18:12.823","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read\n\nIn qla2x00_status_entry(), the FWI2 status path advances sense_data and\nshrinks par_sense_len by rsp_info_len:\n\n\tif (IS_FWI2_CAPABLE(ha)) {\n\t\tsense_data += rsp_info_len;\n\t\tpar_sense_len -= rsp_info_len;\n\t}\n\nrsp_info_len is a 32-bit value taken directly from the target's FCP\nresponse (sf.rsp_data_len), while par_sense_len is the IOCB data area\nsize (28 bytes for 24xx, 60 bytes for 29xx). A hostile or buggy target\nreporting an rsp_info_len larger than par_sense_len makes the unsigned\nsubtraction underflow to a huge value and advances sense_data out of\nbounds.\n\nThe underflowed par_sense_len then defeats the cap in\nqla2x00_handle_sense():\n\n\tif (sense_len > par_sense_len)\n\t\tsense_len = par_sense_len;\n\tmemcpy(cp->sense_buffer, sense_data, sense_len);\n\nso the memcpy reads up to SCSI_SENSE_BUFFERSIZE bytes from the\nout-of-bounds sense_data pointer, leaking adjacent response-ring/heap\nmemory into the command's sense buffer.\n\nClamp rsp_info_len to par_sense_len before the subtraction so\npar_sense_len can never underflow and sense_data stays within the IOCB\ndata area. The fix sits before the comp_status switch, covering both\nqla2x00_handle_sense() call sites.","cvssScore":9.1,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/125b12861c726e58448bb95d55b04851fb131d1f","tags":[]},{"url":"https://git.kernel.org/stable/c/6b08c0cb110a1fba92f99d655020198489699815","tags":[]},{"url":"https://git.kernel.org/stable/c/be75ab791c9b3baca66c70ce03443afebc83acda","tags":[]},{"url":"https://git.kernel.org/stable/c/ca6d880d6c70cb7946e7b3e05d7285f271b6d99e","tags":[]},{"url":"https://git.kernel.org/stable/c/d7f7746ff031ae45724881261804f4bf5317c985","tags":[]},{"url":"https://git.kernel.org/stable/c/e57ace988bda5693f7b3645f652ea4b4220870ee","tags":[]},{"url":"https://git.kernel.org/stable/c/ebc41dfc59d190956e0113e8bd90c28f6f21e8b9","tags":[]},{"url":"https://git.kernel.org/stable/c/f6e8977bce887481b2b2b0e2e14a791270741cfb","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"This vulnerability allows a hostile or buggy SCSI target to cause an underflow in the `par_sense_len` variable, leading to out-of-bounds memory reads and potential memory leaks.","exploitability":"Exploitation requires a hostile or buggy SCSI target and specific conditions on `rsp_info_len` and `par_sense_len`. It is moderately hard to exploit.","blast_radius":"If exploited, this could lead to sensitive memory leaks, potentially allowing attackers to read adjacent response-ring/heap memory.","remediation":"Upgrade to the fixed version 6.4.212 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["memory-leak","scsi","kernel","patch-required"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-29T09:08:27.272Z"}}