High [CVE-2026-18724] Stack buffer overflow in idbm record parsing
This high-severity Red Hat Linux advisory covers CVE-2026-18724 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat package: iscsi-initiator-utils.
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Summary
AI_ONLY_REPORT package: iscsi-initiator-utils-6.2.1.11-0.git4b3e853.el10 ------ Summary: Stack Buffer Overflow in idbm_recinfo_config via Malicious iSCSI Target: a crafted SendTargets TargetName can inject an extra configuration line into a persisted node record and later cause a stack buffer overflow when that record is reparsed.
Requirements to exploit: An attacker must control an iSCSI target or tamper with SendTargets discovery traffic, return a crafted `TargetName` containing a newline and oversized injected key or value data, have the victim run persistent discovery, and then trigger a later node-record read such as update or login.
Component affected: `iscsi-initiator-utils`; `usr/idbm.c:idbm_recinfo_config`, with attacker-controlled input reaching it through SendTargets handling in `usr/discovery.c` and later record serialization in `usr/idbm.c`.
Version affected: `iscsi-initiator-utils-6.2.1.11-0.git4b3e853.el10` Patch available: no released package fix established; proposed patch included below Version fixed: unknown Upstream coordination: Not notified.
CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H - 7.5 (HIGH) AV:N - The attacker can supply the malicious data over the network in a SendTargets discovery response. AC:L - The target-name length cap still leaves enough room for a newline plus an overlong injected key; no race or unusual memory state is required.
- 6.2.1.11-0
Official advisory · high-confidence parse· fetched 24 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 24 days ago·verify at source
Mitigation checklist
- To mitigate this issue, avoid persistent SendTargets discovery when connecting to untrusted or interceptable networks. If persistent discovery is operationally necessary, ensure that node records created from untrusted discovery results are removed before any subsequent update or login operations. Alternatively, use nonpersistent discovery mode where feasible. Changes to iSCSI configuration may require restarting the `iscsid` service for the changes to take full effect, which could temporarily disrupt iSCSI connections.
Official advisory · high-confidence parse· fetched 24 days ago·verify at source
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