CVE-2026-23242 | Linux Kernel up to 6.19.3 RDMA siw_get_hdr null pointer dereference (EUVD-2026-12801)

VDB-351524 · CVE-2026-23242 · EUVD-2026-12801 LINUX KERNEL UP TO 6.19.3 RDMA SIW_GET_HDR NULL POINTER DEREFERENCE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.5 $0-$5k 0.51+ Summaryinfo A vulnerability described as critical has been identified in Linux Kernel up to 6.19.3. This affects the function siw_get_hdr of the component RDMA. Such manipulation leads to null pointer dereference. This vulnerability is traded as CVE-2026-23242. There is no exploit available. Upgrading the affected component is recommended. Detailsinfo A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.19.3. Affected by this issue is the function siw_get_hdr of the component RDMA. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes: 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 The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-23242 since 01/13/2026. There are known technical details, but no exploit is available. Upgrading to version 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.14, 6.19.4 or 7.0-rc1 eliminates this vulnerability. Applying the patch ab61841633d10e56a58c1493a262f0d02dba2f5e/8564dcc12fbb372d984ab45768cae9335777b274/ab957056192d6bd068b3759cb2077d859cca01f0/ffba40b67663567481fa8a1ed5d2da36897c175d/87b7a036d2c73d5bb3ae2d47dee23de465db3355/714c99e1dc8f85f446e05be02ba83972e981a817/ce025f7f5d070596194315eb2e4e89d568b8a755/14ab3da122bd18920ad57428f6cf4fade8385142 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-12801). Productinfo Type Operating System Vendor Linux Name Kernel Version 5.10.251 5.15.201 6.1.164 6.6.127 6.12.0 6.12.1 6.12.2 6.12.3 6.12.4 6.12.5 6.12.6 6.12.7 6.12.8 6.12.9 6.12.10 6.12.11 6.12.12 6.12.13 6.12.14 6.12.15 6.12.16 6.12.17 6.12.18 6.12.19 6.12.20 6.12.21 6.12.22 6.12.23 6.12.24 6.12.25 6.12.26 6.12.27 6.12.28 6.12.29 6.12.30 6.12.31 6.12.32 6.12.33 6.12.34 6.12.35 6.12.36 6.12.37 6.12.38 6.12.39 6.12.40 6.12.41 6.12.42 6.12.43 6.12.44 6.12.45 6.12.46 6.12.47 6.12.48 6.12.49 6.12.50 6.12.51 6.12.52 6.12.53 6.12.54 6.12.55 6.12.56 6.12.57 6.12.58 6.12.59 6.12.60 6.12.61 6.12.62 6.12.63 6.12.64 6.12.65 6.12.66 6.12.67 6.12.68 6.12.69 6.12.70 6.12.71 6.12.72 6.12.73 6.12.74 6.18.0 6.18.1 6.18.2 6.18.3 6.18.4 6.18.5 6.18.6 6.18.7 6.18.8 6.18.9 6.18.10 6.18.11 6.18.12 6.18.13 6.19.0 6.19.1 6.19.2 6.19.3 License open-source Website Vendor: https://www.kernel.org/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.7 VulDB Meta Temp Score: 5.5 VulDB Base Score: 5.7 VulDB Temp Score: 5.5 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Null pointer dereference CWE: CWE-476 / CWE-404 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Partially Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Kernel 5.10.252/5.15.202/6.1.165/6.6.128/6.12.75/6.18.14/6.19.4/7.0-rc1 Patch: ab61841633d10e56a58c1493a262f0d02dba2f5e/8564dcc12fbb372d984ab45768cae9335777b274/ab957056192d6bd068b3759cb2077d859cca01f0/ffba40b67663567481fa8a1ed5d2da36897c175d/87b7a036d2c73d5bb3ae2d47dee23de465db3355/714c99e1dc8f85f446e05be02ba83972e981a817/ce025f7f5d070596194315eb2e4e89d568b8a755/14ab3da122bd18920ad57428f6cf4fade8385142 Timelineinfo 01/13/2026 CVE reserved 03/18/2026 +64 days Advisory disclosed 03/18/2026 +0 days VulDB entry created 03/18/2026 +0 days VulDB entry last update Sourcesinfo Vendor: kernel.org Advisory: git.kernel.org Status: Confirmed CVE: CVE-2026-23242 (🔒) GCVE (CVE): GCVE-0-2026-23242 GCVE (VulDB): GCVE-100-351524 EUVD: 🔒 Entryinfo Created: 03/18/2026 12:00 Updated: 03/18/2026 12:24 Changes: 03/18/2026 12:00 (59), 03/18/2026 12:24 (1) Complete: 🔍 Cache ID: 99:8DB:101 Discussion No comments yet. 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