Bug 2439683 (CVE-2026-23112)

Summary: CVE-2026-23112 kernel: nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2026-02-13 14:01:13 UTC 
In the Linux kernel, the following vulnerability has been resolved:

nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec

nvmet_tcp_build_pdu_iovec() could walk past cmd->req.sg when a PDU
length or offset exceeds sg_cnt and then use bogus sg->length/offset
values, leading to _copy_to_iter() GPF/KASAN. Guard sg_idx, remaining
entries, and sg->length/offset before building the bvec.
Comment 1 TEJ RATHI 2026-02-13 14:33:38 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026021302-CVE-2026-23112-6499@gregkh/T