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CVE-2026-23242— RDMA/siw: Fix potential NULL pointer dereference in header processing

CVSS 7.5 · High EPSS 0.08% · P23

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux8b6a361b8c482f22ac99c3273285ff16b23fba91< ab61841633d10e56a58c1493a262f0d02dba2f5eaffected
8b6a361b8c482f22ac99c3273285ff16b23fba91< 8564dcc12fbb372d984ab45768cae9335777b274affected
8b6a361b8c482f22ac99c3273285ff16b23fba91< ab957056192d6bd068b3759cb2077d859cca01f0affected
8b6a361b8c482f22ac99c3273285ff16b23fba91< ffba40b67663567481fa8a1ed5d2da36897c175daffected
8b6a361b8c482f22ac99c3273285ff16b23fba91< 87b7a036d2c73d5bb3ae2d47dee23de465db3355affected
8b6a361b8c482f22ac99c3273285ff16b23fba91< 714c99e1dc8f85f446e05be02ba83972e981a817affected
8b6a361b8c482f22ac99c3273285ff16b23fba91< ce025f7f5d070596194315eb2e4e89d568b8a755affected
8b6a361b8c482f22ac99c3273285ff16b23fba91< 14ab3da122bd18920ad57428f6cf4fade8385142affected
… +10 more rows
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I. Basic Information for CVE-2026-23242

Vulnerability Information
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Vulnerability Title
RDMA/siw: Fix potential NULL pointer dereference in header processing
Source: NVD (National Vulnerability Database)
Vulnerability 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
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于siw_tcp_rx_data函数中未检查rx_fpdu指针，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 8b6a361b8c482f22ac99c3273285ff16b23fba91 ~ ab61841633d10e56a58c1493a262f0d02dba2f5e -
LinuxLinux 5.3 -

II. Public POCs for CVE-2026-23242

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III. Intelligence Information for CVE-2026-23242

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Patches & Fixes for CVE-2026-23242 (8)

Same Patch Batch · Linux · 2026-03-18 · 35 CVEs total

CVE-2026-232468.8 HIGHwifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration
CVE-2026-232537.8 HIGHmedia: dvb-core: fix wrong reinitialization of ringbuffer on reopen
CVE-2026-232687.8 HIGHapparmor: fix unprivileged local user can do privileged policy management
CVE-2026-232707.8 HIGHnet/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks
CVE-2026-232487.8 HIGHperf/core: Fix refcount bug and potential UAF in perf_mmap
CVE-2026-232437.8 HIGHRDMA/umad: Reject negative data_len in ib_umad_write
CVE-2026-232457.8 HIGHnet/sched: act_gate: snapshot parameters with RCU on replace
CVE-2026-232697.1 HIGHapparmor: validate DFA start states are in bounds in unpack_pdb
CVE-2026-23244nvme: fix memory allocation in nvme_pr_read_keys()
CVE-2025-71267fs: ntfs3: fix infinite loop triggered by zero-sized ATTR_LIST
CVE-2026-23247tcp: secure_seq: add back ports to TS offset
CVE-2025-71266fs: ntfs3: check return value of indx_find to avoid infinite loop
CVE-2026-23249xfs: check for deleted cursors when revalidating two btrees
CVE-2026-23250xfs: check return value of xchk_scrub_create_subord
CVE-2026-23251xfs: only call xf{array,blob}_destroy if we have a valid pointer
CVE-2026-23252xfs: get rid of the xchk_xfile_*_descr calls
CVE-2025-71265fs: ntfs3: fix infinite loop in attr_load_runs_range on inconsistent metadata
CVE-2025-71268btrfs: fix reservation leak in some error paths when inserting inline extent
CVE-2025-71269btrfs: do not free data reservation in fallback from inline due to -ENOSPC
CVE-2025-71270LoongArch: Enable exception fixup for specific ADE subcode

Showing top 20 of 35 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23242

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