CVE-2026-64216: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix potential UAF in netfs_unlock_abandoned_read_pages() netfs_unlock_abandoned_read_pages(rreq) accesses the index of the folios it is wanting to unlock and compares that to rreq->no_unlock_folio so that it doesn't unlock a folio being read for netfs_perform_write() or netfs_write_begin(). However, given that netfs_unlock_abandoned_read_pages() is called _after_ NETFS_RREQ_IN_PROGRESS is cleared, the one folio that it's not allowed to dereference is the one specified by ->no_unlock_folio as ownership immediately reverts to the caller. Fix this by storing the folio pointer instead and using that rather than the index. Also fix netfs_unlock_read_folio() where the same applies.

Засегнати продукти

• Linux Linux: ee4cdf7ba857a894ad1650d6ab77669cbbfa329e преди d4ae8dba90b89e7bb4d1045d1cb26afbaf13ee5c; ee4cdf7ba857a894ad1650d6ab77669cbbfa329e преди 6080fa3ecfbb4448a3b47368629534c09b6ec750; ee4cdf7ba857a894ad1650d6ab77669cbbfa329e преди 3866d015f33aeedf81338dd99154703bef33faef; ee4cdf7ba857a894ad1650d6ab77669cbbfa329e преди dbe556972100fabb8e5a1b3d2163831ff07b1e8e
• Linux Linux: 6.12; преди 6.12; 6.12.106 до 6.12.*; 6.18.34 до 6.18.*; 7.0.11 до 7.0.*; 7.1 до *

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-2026-64216
• https://nvd.nist.gov/vuln/detail/CVE-2026-64216
• https://git.kernel.org/stable/c/d4ae8dba90b89e7bb4d1045d1cb26afbaf13ee5c
• https://git.kernel.org/stable/c/6080fa3ecfbb4448a3b47368629534c09b6ec750
• https://git.kernel.org/stable/c/3866d015f33aeedf81338dd99154703bef33faef
• https://git.kernel.org/stable/c/dbe556972100fabb8e5a1b3d2163831ff07b1e8e