{"id":"CVE-2026-23242","title":"RDMA/siw: Fix potential NULL pointer dereference in header processing","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Fix potential NULL pointer dereference in header processing\n\nIf siw_get_hdr() returns -EINVAL before set_rx_fpdu_context(),\nqp->rx_fpdu can be NULL. The error…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < ab61841633d10e56a58c1493a262f0d02dba2f5e","Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < 8564dcc12fbb372d984ab45768cae9335777b274","Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < ab957056192d6bd068b3759cb2077d859cca01f0","Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < ffba40b67663567481fa8a1ed5d2da36897c175d","Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < 87b7a036d2c73d5bb3ae2d47dee23de465db3355","Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < 714c99e1dc8f85f446e05be02ba83972e981a817","Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < ce025f7f5d070596194315eb2e4e89d568b8a755","Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < 14ab3da122bd18920ad57428f6cf4fade8385142","Linux 5.3"],"published":"2026-03-18","updated":"2026-09-08","sourceUpdated":"2026-09-08T08:45:06.774Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23242","references":[{"url":"https://git.kernel.org/stable/c/ab61841633d10e56a58c1493a262f0d02dba2f5e"},{"url":"https://git.kernel.org/stable/c/8564dcc12fbb372d984ab45768cae9335777b274"},{"url":"https://git.kernel.org/stable/c/ab957056192d6bd068b3759cb2077d859cca01f0"},{"url":"https://git.kernel.org/stable/c/ffba40b67663567481fa8a1ed5d2da36897c175d"},{"url":"https://git.kernel.org/stable/c/87b7a036d2c73d5bb3ae2d47dee23de465db3355"},{"url":"https://git.kernel.org/stable/c/714c99e1dc8f85f446e05be02ba83972e981a817"},{"url":"https://git.kernel.org/stable/c/ce025f7f5d070596194315eb2e4e89d568b8a755"},{"url":"https://git.kernel.org/stable/c/14ab3da122bd18920ad57428f6cf4fade8385142"}],"tags":["cve.org"],"epss":0.00449,"epssPercentile":0.36317,"ingestedAt":"2026-09-08T15:33:26.993Z","slug":"CVE-2026-23242","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Fix potential NULL pointer dereference in header processing\n\nIf siw_get_hdr() returns -EINVAL before set_rx_fpdu_context(),\nqp->rx_fpdu can be NULL. The error path in siw_tcp_rx_data()\ndereferences qp->rx_fpdu->more_ddp_segs without checking, which\nmay lead to a NULL pointer deref. Only check more_ddp_segs when\nrx_fpdu is present.\n\nKASAN splat:\n[  101.384271] KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7]\n[  101.385869] RIP: 0010:siw_tcp_rx_data+0x13ad/0x1e50\n\n## Affected\n\n- `Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < ab61841633d10e56a58c1493a262f0d02dba2f5e`\n- `Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < 8564dcc12fbb372d984ab45768cae9335777b274`\n- `Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < ab957056192d6bd068b3759cb2077d859cca01f0`\n- `Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < ffba40b67663567481fa8a1ed5d2da36897c175d`\n- `Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < 87b7a036d2c73d5bb3ae2d47dee23de465db3355`\n- `Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < 714c99e1dc8f85f446e05be02ba83972e981a817`\n- `Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < ce025f7f5d070596194315eb2e4e89d568b8a755`\n- `Linux >= 8b6a361b8c482f22ac99c3273285ff16b23fba91 < 14ab3da122bd18920ad57428f6cf4fade8385142`\n- `Linux 5.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}