{"id":"CVE-2026-74741","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74741","summary":"net: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling\n\nIn non-MSI-X mode (such as legacy INTx or single MSI), wx->msix_entry is\nnot allocated or initialized. Calling NGBE_INTR_MISC(wx) dereferences\nwx->msix_entry->entry, leading to a NULL pointer dereference crash.\n\nThis issue was introduced by fixing the IRQ vector when the number of\nVFs is 7. Fix the issue by explicitly checking `pdev->msix_enabled` to\ndetermine the correct vector index.\n\nAdditionally, as a side fix, set the interrupt mask to BIT(0) for the\nnon-MSI-X fallback. In MSI/INTx mode, the MISC and queue interrupts\nshare vector 0, and the WX_PX_MISC_IVAR register is only valid in the\nMSI-X case. Thus, BIT(0) is the correct mask for the miscellaneous cause\nwhen MSI-X is disabled.","published":"2026-08-26T14:36:52.937Z","modified":"2026-08-28T03:47:17.145299360Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.18.46"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0ab482b2195edc000262f0eae1cdcb416b8f335d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5f3a13e0bb5ebcc1ca2dfda42ea40b9f3c2be6ea"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cef4c5b9aca24651d069adf9462b221df6a2a669"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74741.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74741"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-28T03:47:17.145299360Z"}}