CVE-2026-64291: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: iommufd: Set veventq_depth upper bound iommufd_veventq_alloc() accepts any !0 veventq_depth from userspace, with an upper bound at U32_MAX. This leaves a vulnerability where userspace can allocate excessively large queues to exhaust kernel memory reserves. Cap the veventq_depth (maximum number of entries) to 1 << 19, matching the maximum number of entries in the SMMUv3 EVTQ (the largest use case today).

Засегнати продукти

• Linux Linux: e36ba5ab808ef6237c3148d469c8238674230e2b преди f565297edf316016be4a1a9e2eb9f39359313f43; e36ba5ab808ef6237c3148d469c8238674230e2b преди e7b5e55652746b1221b9c10ff80eae8a154101ba; e36ba5ab808ef6237c3148d469c8238674230e2b преди 6ebf2eb46fbd5b40393ff8fbb847ba96925beaff
• Linux Linux: 6.15; преди 6.15; 6.18.39 до 6.18.*; 7.1.4 до 7.1.*; от 7.2 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-64291
• https://nvd.nist.gov/vuln/detail/CVE-2026-64291
• https://git.kernel.org/stable/c/f565297edf316016be4a1a9e2eb9f39359313f43
• https://git.kernel.org/stable/c/e7b5e55652746b1221b9c10ff80eae8a154101ba
• https://git.kernel.org/stable/c/6ebf2eb46fbd5b40393ff8fbb847ba96925beaff