UBUNTU-CVE-2026-23112
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.
02 / AFFECTED SOFTWARE
Affected packages
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11 explicit affected versions
1 explicit affected versions
119 explicit affected versions
15 explicit affected versions
35 explicit affected versions
74 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/52a0a98549344ca20ad81a4176d68d28e3c05a5c
- https://git.kernel.org/stable/c/043b4307a99f902697349128fde93b2ddde4686c
- 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://ubuntu.com/security/CVE-2026-23112
- https://ubuntu.com/security/notices/USN-8244-1
- https://ubuntu.com/security/notices/USN-8245-1
- https://ubuntu.com/security/notices/USN-8254-1
- https://ubuntu.com/security/notices/USN-8254-2
- https://ubuntu.com/security/notices/USN-8254-3
- https://ubuntu.com/security/notices/USN-8255-1
- https://ubuntu.com/security/notices/USN-8255-2
- https://ubuntu.com/security/notices/USN-8255-3
- https://ubuntu.com/security/notices/USN-8257-1
- https://ubuntu.com/security/notices/USN-8258-1
- https://ubuntu.com/security/notices/USN-8260-1
- https://ubuntu.com/security/notices/USN-8261-1
- https://ubuntu.com/security/notices/USN-8273-1
- https://ubuntu.com/security/notices/USN-8275-1
- https://ubuntu.com/security/notices/USN-8297-1
- https://ubuntu.com/security/notices/USN-8391-1
- https://ubuntu.com/security/notices/USN-8439-1
- https://ubuntu.com/security/notices/USN-8440-1
- https://ubuntu.com/security/notices/USN-8508-1
- https://www.cve.org/CVERecord?id=CVE-2026-23112