CVE-2026-74556
CVE-2026-74556: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.2
High [CVE-2026-74556] Bound SCSI Response data segment to the connection buffer
CVE-2026-74556Source published Source updated
In the Linux kernel, the following vulnerability has been resolved: scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer iscsi_tcp_hdr_dissect() receives the data segment of several PDU types into the fixed-size conn->data buffer, which is allocated for ISCSI_DEF_MAX_RECV_SEG_LEN (8192) bytes. For the LOGIN_RSP, TEXT_RSP, REJECT and ASYNC_EVENT opcodes the dissect path already rejects a PDU whose DataSegmentLength exceeds that buffer. The SCSI Command Response (ISCSI_OP_SCSI_CMD_RSP) path also copies its data segment (sense/response data) into conn->data via iscsi_tcp_data_recv_prep(), but it does so without the same check. The only upstream bound on in.datalen is conn->max_recv_dlength, the initiator's advertised MaxRecvDataSegmentLength, which is commonly…
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux 7
1 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- kernel-0:6.12.0-211.55.1.el10_2
- kernel-rt-0:4.18.0-553.163.1.rt7.504.el8_10
- kernel-0:4.18.0-553.163.1.el8_10
- kernel-0:5.14.0-687.48.1.el9_8
4 more entries in the full advisory.
- Mitigation guidance
- If iSCSI initiator functionality is not required, prevent the `libiscsi_tcp` kernel module from loading by blacklisting it. Create a file such as `/etc/modprobe.d/blacklist-iscsi.conf` with the content `blacklist libiscsi_tcp`. A system reboot is required for this change to take effect. This may impact systems relying on iSCSI storage.
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