{"id":"CVE-2026-74557","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libiscsi: Fix stale-data leak into the SCSI sense buffer\n\niscsi_scsi_cmd_rsp() copies the sense data of a SCSI Response from the\ntarget-supplied data segment","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libiscsi: Fix stale-data leak into the SCSI sense buffer\n\niscsi_scsi_cmd_rsp() copies the sense data of a SCSI Response from the\ntarget-supplied data segment.  Th…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","vendor":"Linux","product":"Linux","affected":["Linux >= 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 < 812f1ae95b22419422972748f173b0916ee4d621","Linux >= 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 < fef6167e8149896cd81bea333fd51b1c91239149","Linux >= 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 < baa04572673125e4d5bc309b4077d1cb46cc78d1","Linux >= 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 < 7567f06abdefb1caf2d836107c4d08c5185c650e","Linux >= 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 < 60499924faf4ef97e84228c20515218ef121facf","Linux >= 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 < 3ef209ca0b4b68c75e9a814d90cc916026b5a6ac","Linux >= 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 < 1f07a897d43c63e6c9458bf77450defef39b5833","Linux >= 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 < 98b87885de4b7f605533a2860685f5689fce8e82","Linux 2.6.18"],"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T20:17:37.470","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74557","references":[{"url":"https://git.kernel.org/stable/c/1f07a897d43c63e6c9458bf77450defef39b5833","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3ef209ca0b4b68c75e9a814d90cc916026b5a6ac","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/60499924faf4ef97e84228c20515218ef121facf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7567f06abdefb1caf2d836107c4d08c5185c650e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/812f1ae95b22419422972748f173b0916ee4d621","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/98b87885de4b7f605533a2860685f5689fce8e82","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/baa04572673125e4d5bc309b4077d1cb46cc78d1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fef6167e8149896cd81bea333fd51b1c91239149","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00329,"epssPercentile":0.25897,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T19:00:09.303445Z"},"ingestedAt":"2026-10-16T19:46:24.343Z","slug":"CVE-2026-74557","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libiscsi: Fix stale-data leak into the SCSI sense buffer\n\niscsi_scsi_cmd_rsp() copies the sense data of a SCSI Response from the\ntarget-supplied data segment.  The segment carries a 2-byte sense length\nfollowed by the sense bytes, so it must hold 2 + senselen bytes, but the\nbounds check only requires datalen >= senselen:\n\n\tsenselen = get_unaligned_be16(data);\n\tif (datalen < senselen)\n\t\tgoto invalid_datalen;\n\tmemcpy(sc->sense_buffer, data + 2,\n\t       min_t(uint16_t, senselen, SCSI_SENSE_BUFFERSIZE));\n\nA target that returns a SCSI Response whose datalen equals senselen\n(with senselen <= SCSI_SENSE_BUFFERSIZE) makes the memcpy() from data +\n2 read up to two bytes past the received data.  Those bytes are stale\nconn->data contents and end up in the command's sense buffer, which is\nreturned to userspace.\n\nAccount for the 2-byte sense length prefix in the check.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}