by Kastro
Paper/Archive/CVE-2026-23112

CVE-2026-23112

Linux Linux — nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec

EPSS 0.5%CVSS 9.8
critical.is priorityof 100
38
CVSS 9.8 (CNA, NVD agree)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 40.4.404 × 208.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Linux872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < 0b9981751be14b59b4473383c731c833738aebdb0b9981751be14b59b4473383c731c833738aebdbCNA
Linux872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < 42afe8ed8ad2de9c19457156244ef3e1eca94b5d42afe8ed8ad2de9c19457156244ef3e1eca94b5dCNA
Linux872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < 1385be357e8acd09b36e026567f3a9d5c61139de1385be357e8acd09b36e026567f3a9d5c61139deCNA
Linux872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < dca1a6ba0da9f472ef040525fab10fd9956db59fdca1a6ba0da9f472ef040525fab10fd9956db59fCNA
Linux872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < 19672ae68d52ff75347ebe2420dde1b07adca09f19672ae68d52ff75347ebe2420dde1b07adca09fCNA
Linux872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < ab200d71553bdcf4de554a5985b05b2dd606bc57ab200d71553bdcf4de554a5985b05b2dd606bc57CNA
Linux872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < 52a0a98549344ca20ad81a4176d68d28e3c05a5c52a0a98549344ca20ad81a4176d68d28e3c05a5cCNA
Linux5.05.10.253CNA
RUGGEDCOM RST2428P< V4.0V4.0siemens-SADP

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refcert-portal.siemens.com/productcert/html/ssa-253495.htmlrefgit.kernel.org/stable/c/0b9981751be14b59b4473383c731c833738aebdbrefgit.kernel.org/stable/c/42afe8ed8ad2de9c19457156244ef3e1eca94b5drefgit.kernel.org/stable/c/1385be357e8acd09b36e026567f3a9d5c61139derefgit.kernel.org/stable/c/dca1a6ba0da9f472ef040525fab10fd9956db59frefgit.kernel.org/stable/c/19672ae68d52ff75347ebe2420dde1b07adca09frefgit.kernel.org/stable/c/ab200d71553bdcf4de554a5985b05b2dd606bc57refgit.kernel.org/stable/c/52a0a98549344ca20ad81a4176d68d28e3c05a5c