CVE-2026-74557

CVE CVE-2026-74557EUVD EUVD-2026-59622Published 2026-08-15T12:28:01.000ZLast changed 2026-08-19T16:38:59.000ZCVSS 7.5

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: scsi: libiscsi: Fix stale-data leak into the SCSI sense buffer iscsi_scsi_cmd_rsp() copies the sense data of a SCSI Response from the target-supplied data segment. The segment carries a 2-byte sense length followed by the sense bytes, so it must hold 2 + senselen bytes, but the bounds check only requires datalen >= senselen: senselen = get_unaligned_be16(data); if (datalen < senselen) goto invalid_datalen; memcpy(sc->sense_buffer, data + 2, min_t(uint16_t, senselen, SCSI_SENSE_BUFFERSIZE)); A target that returns a SCSI Response whose datalen equals senselen (with senselen <= SCSI_SENSE_BUFFERSIZE) makes the memcpy() from data + 2 read up to two bytes past the received data. Those bytes are stale conn->data contents and end up in the command's sense buffer, which is returned to userspace. Account for the 2-byte sense length prefix in the check.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 <98b87885de4b7f605533a2860685f5689fce8e82; 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 <fef6167e8149896cd81bea333fd51b1c91239149; patch: 6.18.44; 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 <baa04572673125e4d5bc309b4077d1cb46cc78d1; patch: 0; patch: 7.1.8; 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 <812f1ae95b22419422972748f173b0916ee4d621; 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 <3ef209ca0b4b68c75e9a814d90cc916026b5a6ac; 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 <1f07a897d43c63e6c9458bf77450defef39b5833; 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 <7567f06abdefb1caf2d836107c4d08c5185c650e; patch: 6.6.151; patch: 7.2; patch: 5.15.216; patch: 6.12.103; 2.6.18; patch: 6.1.183; 7996a778ff8c717cb1a7a294475c59cc8f1e9fb8 <60499924faf4ef97e84228c20515218ef121facf; patch: 5.10.265

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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