CVE-2025-38733

01/תיאור (מקור, אנגלית)

In the Linux kernel, the following vulnerability has been resolved: s390/mm: Do not map lowcore with identity mapping Since the identity mapping is pinned to address zero the lowcore is always also mapped to address zero, this happens regardless of the relocate_lowcore command line option. If the option is specified the lowcore is mapped twice, instead of only once. This means that NULL pointer accesses will succeed instead of causing an exception (low address protection still applies, but covers only parts). To fix this never map the first two pages of physical memory with the identity mapping.

02/מוצרים מושפעים

linux: linux kernel

03/קישורים3

• git.kernel.org/stable/c/1d7864acd497cb468a998d44631f84896f885e85 Patch
• git.kernel.org/stable/c/30bf5728bb217a6d1ba73f44094c9b9c6bc9a567 Patch
• git.kernel.org/stable/c/93f616ff870a1fb7e84d472cad0af651b18f9f87 Patch