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Vulnerability record · CVE-2026-23112 · published 13 February 2026

CVE-2026-23112: Linux kernel out-of-bounds write vulnerability

Linux · Linux Kernel

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.

9.8 CVSS 3.1 Critical EPSS 0.41% · top 66.8% CWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/0b9981751be14b59b4473383c731c833738aebdb
https://git.kernel.org/stable/c/1385be357e8acd09b36e026567f3a9d5c61139de Patch
https://git.kernel.org/stable/c/19672ae68d52ff75347ebe2420dde1b07adca09f Patch
https://git.kernel.org/stable/c/42afe8ed8ad2de9c19457156244ef3e1eca94b5d Patch
https://git.kernel.org/stable/c/52a0a98549344ca20ad81a4176d68d28e3c05a5c Patch
https://git.kernel.org/stable/c/ab200d71553bdcf4de554a5985b05b2dd606bc57 Patch
https://git.kernel.org/stable/c/dca1a6ba0da9f472ef040525fab10fd9956db59f Patch
https://cert-portal.siemens.com/productcert/html/ssa-253495.html

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Source: NIST National Vulnerability Database (record CVE-2026-23112), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.