CVE-2026-80685: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: mm/util: don't read __page_2 for order-1 folios in snapshot_page() snapshot_page() currently reads __page_2 after checking nr_pages > 1, but it should only do so when nr_pages > 2. If an order-1 folio is allocated at the end of a vmemmap section, __page_2 will not exist and reading it will cause a fault. During DLPAR memory remove on a 22 TB ppc64le LPAR, snapshot_page() oopsed on the page isolation path while reading an order-1 folio's __page_2 from an adjacent absent section (unmapped vmemmap). Fix this to avoid reading memmap that doesn't exist (e.g., a vmemmap hole).

Засегнати продукти

• Linux Linux: 31a31da8a6187f1e5448ec73222e01d7d3fed4aa преди 9668ffe0e2a5e2399dce281620198a2e415871fc; 31a31da8a6187f1e5448ec73222e01d7d3fed4aa преди c649324571206a30949765320b91ccdb4c1722dc; 31a31da8a6187f1e5448ec73222e01d7d3fed4aa преди 7441d6348c70738e9ed307510db171c7a9b3f4bf; 4117738bd42c8ab58090729daf0f8472a936f662; 6.12.111 преди 6.13
• Linux Linux: 6.15; преди 6.15; 6.18.44 до 6.18.*; 7.1.8 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-2026-80685
• https://nvd.nist.gov/vuln/detail/CVE-2026-80685
• https://git.kernel.org/stable/c/9668ffe0e2a5e2399dce281620198a2e415871fc
• https://git.kernel.org/stable/c/c649324571206a30949765320b91ccdb4c1722dc
• https://git.kernel.org/stable/c/7441d6348c70738e9ed307510db171c7a9b3f4bf