What’s Vulnerable › Vulnerabilities

CVE-2026-23112: nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-13 · updated 2026-10-19
• Weakness: CWE-787

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.

Affected products

• Linux kernel: from 5.0 before 5.10.250; from 5.11 before 5.15.200; from 5.16 before 6.1.163; from 6.2 before 6.6.124; from 6.7 before 6.12.70; from 6.13 before 6.18.10 — fixed in 5.10.250, 5.15.200, 6.1.163, 6.12.70, 6.18.10, 6.6.124

How to fix

Upgrade to a fixed version: Linux kernel 5.10.250, 5.15.200, 6.1.163, 6.12.70. Check the vendor advisory for mitigations.

References

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

Get alerted when CVE-2026-23112 or the next vulnerability affects your stack