CVE-2026-31699

취약점 유형

In the Linux kernel, the following vulnerability has been resolved: crypto: ccp: Don't attempt to copy CSR to userspace if PSP command failed When retrieving the PEK CSR, don't attempt to copy the blob to userspace if the firmware command failed. If the failure was due to an invalid length, i.e. the userspace buffer+length was too small, copying the number of bytes _firmware_ requires will overflow the kernel-allocated buffer and leak data to userspace. BUG: KASAN: slab-out-of-bounds in instrument_copy_to_user ../include/linux/instrumented.h:129 [inline] BUG: KASAN: slab-out-of-bounds in _inline_copy_to_user ../include/linux/uaccess.h:205 [inline] BUG: KASAN: slab-out-of-bounds in _copy_to_user+0x66/0xa0 ../lib/usercopy.c:26 Read of size 2084 at addr ffff898144612e20 by task syz.9.219/21405 CPU: 14 UID: 0 PID: 21405 Comm: syz.9.219 Tainted: G U O 7.0.0-smp-DEV #28 PREEMPTLAZY Tainted: [U]=USER, [O]=OOT_MODULE Hardware name: Google, Inc. Arcadia_IT_80/Arcadia_IT_80, BIOS 12.62.0-0 11/19/2025 Call Trace: <TASK> dump_stack_lvl+0xc5/0x110 ../lib/dump_stack.c:120 print_address_description ../mm/kasan/report.c:378 [inline] print_report+0xbc/0x260 ../mm/kasan/report.c:482 kasan_report+0xa

영향받는 제품

• linux linux_kernel

참고 자료

• https://git.kernel.org/stable/c/0fb87e44b81385f940b482cba5b3f0bd18fb8185
• https://git.kernel.org/stable/c/111dcc6d0f016076745824a787d25609d0022f4c
• https://git.kernel.org/stable/c/372116eece159adff631b1508344c8b85ebf9559
• https://git.kernel.org/stable/c/3b4fd8f15765d9a3105b834dba8a05d025e5e16e
• https://git.kernel.org/stable/c/502d10a1d9d477e6c7fc7021a2dac7018f4ab8b5
• https://git.kernel.org/stable/c/59e9ae81f8670ccc780bc75f45a355736f640ec9