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Vulnerability record · CVE-2026-23242 · published 18 March 2026

CVE-2026-23242: Linux kernel null pointer dereference vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Fix potential NULL pointer dereference in header processing If siw_get_hdr() returns -EINVAL before set_rx_fpdu_context(), qp->rx_fpdu can be NULL. The error path in siw_tcp_rx_data() dereferences qp->rx_fpdu->more_ddp_segs without checking, which may lead to a NULL pointer deref. Only check more_ddp_segs when rx_fpdu is present. KASAN splat: [ 101.384271] KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7] [ 101.385869] RIP: 0010:siw_tcp_rx_data+0x13ad/0x1e50

7.5 CVSS 3.1 High EPSS 0.45% · top 63.5% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score
0.45%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
14 Jul 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Fix potential NULL pointer dereference in header processing If siw_get_hdr() returns -EINVAL before set_rx_fpdu_context(), qp->rx_fpdu can be NULL. The error path in siw_tcp_rx_data() dereferences qp->rx_fpdu->more_ddp_segs without checking, which may lead to a NULL pointer deref. Only check more_ddp_segs when rx_fpdu is present. KASAN splat: [ 101.384271] KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7] [ 101.385869] RIP: 0010:siw_tcp_rx_data+0x13ad/0x1e50

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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/14ab3da122bd18920ad57428f6cf4fade8385142 Patch
https://git.kernel.org/stable/c/714c99e1dc8f85f446e05be02ba83972e981a817 Patch
https://git.kernel.org/stable/c/8564dcc12fbb372d984ab45768cae9335777b274 Patch
https://git.kernel.org/stable/c/87b7a036d2c73d5bb3ae2d47dee23de465db3355 Patch
https://git.kernel.org/stable/c/ab61841633d10e56a58c1493a262f0d02dba2f5e Patch
https://git.kernel.org/stable/c/ab957056192d6bd068b3759cb2077d859cca01f0 Patch
https://git.kernel.org/stable/c/ce025f7f5d070596194315eb2e4e89d568b8a755 Patch
https://git.kernel.org/stable/c/ffba40b67663567481fa8a1ed5d2da36897c175d Patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html

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Source: NIST National Vulnerability Database (record CVE-2026-23242), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.