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CVE-2026-31698: Linux, грешка в паметта

7.1

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: crypto: ccp: Don't attempt to copy PDH cert to userspace if PSP command failed When retrieving the PDH cert, don't attempt to copy the blobs 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 ffff8885c4ab8aa0 by task syz.0.186/21033 CPU: 51 UID: 0 PID: 21033 Comm: syz.0.186 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 34.84.12-0 11/17/2025 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+0xa2/0xe0 ../mm/kasan/report.c:595 check_region_inline ../mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2c0 ../mm/kasan/generic.c:200 instrument_copy_to_user ../include/linux/instrumented.h:129 [inline] _inline_copy_to_user ../include/linux/uaccess.h:205 [inline] _copy_to_user+0x66/0xa0 ../lib/usercopy.c:26 copy_to_user ../include/linux/uaccess.h:236 [inline] sev_ioctl_do_pdh_export+0x3d3/0x7c0 ../drivers/crypto/ccp/sev-dev.c:2347 sev_ioctl+0x2a2/0x490 ../drivers/crypto/ccp/sev-dev.c:2568 vfs_ioctl ../fs/ioctl.c:51 [inline] __do_sys_ioctl ../fs/ioctl.c:597 [inline] __se_sys_ioctl+0x11d/0x1b0 ../fs/ioctl.c:583 do_syscall_x64 ../arch/x86

Засегнати продукти

  • Linux Linux: 76a2b524a4b1d6dc0f2421f9854a01d55d5e5436 преди af67d35da744b6b678c7a0296d9c679658779829; 76a2b524a4b1d6dc0f2421f9854a01d55d5e5436 преди 854d7846e1d29f32f1bbeb2e869e794df12067f6; 76a2b524a4b1d6dc0f2421f9854a01d55d5e5436 преди 25d9b3446001185484209cf57951f3368462b631; 76a2b524a4b1d6dc0f2421f9854a01d55d5e5436 преди b5c14bd4da1f376f385722fe1da993f1edab6472; 76a2b524a4b1d6dc0f2421f9854a01d55d5e5436 преди 78b97e43d0b3e674d9d49ae56937b11e2ba3fcaf; 76a2b524a4b1d6dc0f2421f9854a01d55d5e5436 преди 051e51aa55fd4cdc3e8283cf4476aeeb5f563274; 76a2b524a4b1d6dc0f2421f9854a01d55d5e5436 преди 50808c13452dae43a2c90b1bbbf9daa16501ce70; 76a2b524a4b1d6dc0f2421f9854a01d55d5e5436 преди e76239fed3cffd6d304d8ca3ce23984fd24f57d3
  • Linux Linux: 4.16; преди 4.16; 5.10.258 до 5.10.*; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.136 до 6.6.*; 6.12.84 до 6.12.*; 6.18.25 до 6.18.*; 7.0.2 до 7.0.*; от 7.1 нататък
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: всички версии

Вид слабост

История

  • 1 май 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-31698: Linux, грешка в паметта | freedomonline.bg