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CVE-2026-23220: Linux

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix infinite loop caused by next_smb2_rcv_hdr_off reset in error paths The problem occurs when a signed request fails smb2 signature verification check. In __process_request(), if check_sign_req() returns an error, set_smb2_rsp_status(work, STATUS_ACCESS_DENIED) is called. set_smb2_rsp_status() set work->next_smb2_rcv_hdr_off as zero. By resetting next_smb2_rcv_hdr_off to zero, the pointer to the next command in the chain is lost. Consequently, is_chained_smb2_message() continues to point to the same request header instead of advancing. If the header's NextCommand field is non-zero, the function returns true, causing __handle_ksmbd_work() to repeatedly process the same failed request in an infinite loop. This results in the kernel log being flooded with "bad smb2 signature" messages and high CPU usage. This patch fixes the issue by changing the return value from SERVER_HANDLER_CONTINUE to SERVER_HANDLER_ABORT. This ensures that the processing loop terminates immediately rather than attempting to continue from an invalidated offset.

    Засегнати продукти

    • Linux Linux: 4b9b7ea1ffb1e34f01fa5726d0c184931b9ba565 преди 544adb0a6658ea1bff4064723761dbf05f95b1e2; 943cebf9ea3415ddefcd670d24d8883e97ba3d60 преди fb3b66bd72deb5543addaefa67963b34fb163a7b; be0f89d4419dc5413a1cf06db3671c9949be0d52 преди 5accdc5b7f28a81bbc5880ac0b8886e60c86e8c8; be0f89d4419dc5413a1cf06db3671c9949be0d52 преди f7b1c2f5642bbd60b1beef1f3298cbac81eb232c; be0f89d4419dc5413a1cf06db3671c9949be0d52 преди 71b5e7c528315ca360a1825a4ad2f8ae48c5dc16; be0f89d4419dc5413a1cf06db3671c9949be0d52 преди 9135e791ec2709bcf0cda0335535c74762489498; be0f89d4419dc5413a1cf06db3671c9949be0d52 преди 010eb01ce23b34b50531448b0da391c7f05a72af; 5.15.145 преди 5.15.203; 6.1.71 преди 6.1.164
    • Linux Linux: 6.6; преди 6.6; 5.15.203 до 5.15.*; 6.1.164 до 6.1.*; 6.6.125 до 6.6.*; 6.12.72 до 6.12.*; 6.18.11 до 6.18.*; 6.19.1 до 6.19.*; от 7.0 нататък
    • Siemens RUGGEDCOM RST2428P: преди V4.0

    История

    • 18 февруари 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-23220: Linux | freedomonline.bg