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CVE-2026-63890: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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Време до експлоатация

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: scsi: fcoe: Reject FIP descriptors with zero fip_dlen in CVL walker drivers/scsi/fcoe/fcoe_ctlr.c::fcoe_ctlr_recv_clr_vlink() advanced the descriptor cursor by an attacker-supplied fip_dlen without ever requiring dlen >= sizeof(struct fip_desc) in the default branch. The named descriptor cases (FIP_DT_MAC, FIP_DT_NAME, FIP_DT_VN_ID) checked their per-type minimum lengths, but a FIP_DT_NON_CRITICAL descriptor (fip_dtype >= 128, which the standard requires receivers to silently ignore) skipped that check entirely. An unauthenticated L2 peer on the FCoE control VLAN could hang fcoe_ctlr_recv_work on an fcoe, qedf, or bnx2fc initiator indefinitely by emitting one FIP CVL frame whose single descriptor had fip_dtype == FIP_DT_NON_CRITICAL and fip_dlen == 0: the cursor advanced zero bytes per iteration and the loop condition rlen >= sizeof(*desc) stayed true forever, blocking every subsequent FIP frame on that controller. Tighten the outer dlen guard to also reject dlen < sizeof(struct fip_desc), so a malformed descriptor whose length cannot even cover the descriptor header is rejected before the switch. This is the same lower-bound the named cases already apply and is the minimum scope that closes the loop.

    Засегнати продукти

    • Linux Linux: 97c8389d54b9665c38105ea72a428a44b97ff2f6 преди d179949d2175d2857d1c3a275a22bea58bcc5d36; 97c8389d54b9665c38105ea72a428a44b97ff2f6 преди fda976f7390bb5d1e9b84ef11ebb17323038e0c6; 97c8389d54b9665c38105ea72a428a44b97ff2f6 преди 80a0cd307205236ca28aa49bc553f58edcb9bf3a; 97c8389d54b9665c38105ea72a428a44b97ff2f6 преди 0e3c6e5a8fc15a74dfb1e0c1df9f1da73600a81a; 97c8389d54b9665c38105ea72a428a44b97ff2f6 преди 549859a1131052b07dff11a448e9f3221a40f260; 97c8389d54b9665c38105ea72a428a44b97ff2f6 преди 14dd80a20a72ce334adcc2d67402360527065948; 97c8389d54b9665c38105ea72a428a44b97ff2f6 преди d537d29d51c8b808469e5adacf3e5a0092700738; 97c8389d54b9665c38105ea72a428a44b97ff2f6 преди 9eed1bd59937e6828b00d2f2dfef631d964f3636
    • Linux Linux: 2.6.30; преди 2.6.30; 5.10.259 до 5.10.*; 5.15.210 до 5.15.*; 6.1.176 до 6.1.*; 6.6.143 до 6.6.*; 6.12.93 до 6.12.*; 6.18.35 до 6.18.*; 7.0.12 до 7.0.*; от 7.1 нататък

    История

    • 19 юли 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-63890: Linux | freedomonline.bg