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CVE-2026-31697

Updated on 01 May 2026

Severity

7.1 High severity

Details

CVSS score
7.1
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE ID
Links
NISTCIRCLRHELUbuntu

Overview

About vulnerability

In the Linux kernel, the following vulnerability has been resolved:

crypto: ccp: Don’t attempt to copy ID to userspace if PSP command failed

When retrieving the ID for the CPU, don’t attempt to copy the ID 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 64 at addr ffff8881867f5960 by task syz.0.906/24388

CPU: 130 UID: 0 PID: 24388 Comm: syz.0.906 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+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_get_id2+0x361/0x490 ../drivers/crypto/ccp/sev-dev.c:2222 sev_ioctl+0x25f/0x490 ../drivers/crypto/ccp/sev-dev.c:2575 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/entry/syscall_64.c:63 [inline] do_syscall_64+0xe0/0x800 ../arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e </TASK>

WARN if the driver says the command succeeded, but the firmware error code says otherwise, as __sev_do_cmd_locked() is expected to return -EIO on any firwmware error.

Details

Affected product:
AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , Oracle Linux 7 ELS , TuxCare 9.6 ESU , Ubuntu 20.04 ELS
Affected packages:
kernel @ 5.10.0 (+8 more)

Fixes

KernelCare state

Live-patch status from KernelCare for each operating system.

Operating system Status Covered kernels
AlmaLinux 9.2 ESU Planned —
AlmaLinux 9.6 ESU Planned —
Debian 11 Released
37 kernels
  • 5.10.46-5
  • 5.10.70-1
  • 5.10.46-4
  • 5.10.84-1
  • 5.10.92-1
  • 5.10.92-2
  • 5.10.103-1
  • 5.10.106-1
  • 5.10.113-1
  • 5.10.120-1
  • 5.10.127-1
  • 5.10.127-2
  • 5.10.136-1
  • 5.10.140-1
  • 5.10.149-1
  • 5.10.149-2
  • 5.10.158-2
  • 5.10.162-1
  • 5.10.179-1
  • 5.10.179-2
  • 5.10.179-3
  • 5.10.179-5
  • 5.10.191-1
  • 5.10.197-1
  • 5.10.178-3
  • 5.10.205-2
  • 5.10.205-1
  • 5.10.209-2
  • 5.10.216-1
  • 5.10.218-1
  • 5.10.221-1
  • 5.10.223-1
  • 5.10.226-1
  • 5.10.234-1
  • 5.10.237-1
  • 5.10.244-1
  • 5.10.247-1
Debian 11 cloud Released
17 kernels
  • 5.10.113-1
  • 5.10.179-2
  • 5.10.179-3
  • 5.10.179-5
  • 5.10.191-1
  • 5.10.197-1
  • 5.10.205-2
  • 5.10.209-2
  • 5.10.216-1
  • 5.10.218-1
  • 5.10.221-1
  • 5.10.223-1
  • 5.10.226-1
  • 5.10.234-1
  • 5.10.237-1
  • 5.10.244-1
  • 5.10.247-1
Debian 12 Released
40 kernels
  • 6.1.38-1
  • 6.1.38-2
  • 6.1.38-4
  • 6.1.52-1
  • 6.1.55-1
  • 6.1.64-1
  • 6.1.66-1
  • 6.1.69-1
  • 6.1.76-1
  • 6.1.27-1
  • 6.1.67-1
  • 6.1.85-1
  • 6.1.90-1
  • 6.1.94-1
  • 6.1.99-1
  • 6.1.106-3
  • 6.1.112-1
  • 6.1.115-1
  • 6.1.119-1
  • 6.1.123-1
  • 6.1.128-1
  • 6.1.124-1
  • 6.1.129-1
  • 6.1.133-1
  • 6.1.135-1
  • 6.1.137-1
  • 6.1.140-1
  • 6.1.139-1
  • 6.1.147-1
  • 6.1.148-1
  • 6.1.153-1
  • 6.1.158-1
  • 6.1.159-1
  • 6.1.162-1
  • 6.1.164-1
  • 6.1.170-1
  • 6.1.170-3
  • 6.1.172-1
  • 6.1.174-1
  • 6.1.170-2
Debian 13 Planned —
Proxmox VE 7 5.15 Released
47 kernels
  • 5.15.5-1-pve-5.15.5-1
  • 5.15.12-1-pve-5.15.12-2
  • 5.15.12-1-pve-5.15.12-3
  • 5.15.17-1-pve-5.15.17-1
  • 5.15.19-1-pve-5.15.19-1
  • 5.15.19-2-pve-5.15.19-2
  • 5.15.19-2-pve-5.15.19-3
  • 5.15.27-1-pve-5.15.27-1
  • 5.15.30-1-pve-5.15.30-1
  • 5.15.30-2-pve-5.15.30-3
  • 5.15.35-1-pve-5.15.35-1
  • 5.15.35-1-pve-5.15.35-2
  • 5.15.35-1-pve-5.15.35-3
  • 5.15.35-2-pve-5.15.35-4
  • 5.15.35-2-pve-5.15.35-5
  • 5.15.35-3-pve-5.15.35-6
  • 5.15.39-1-pve-5.15.39-1
  • 5.15.39-2-pve-5.15.39-2
  • 5.15.39-3-pve-5.15.39-3
  • 5.15.39-4-pve-5.15.39-4
  • 5.15.7-1-pve-5.15.7-1
  • 5.15.53-1-pve-5.15.53-1
  • 5.15.60-1-pve-5.15.60-1
  • 5.15.60-2-pve-5.15.60-2
  • 5.15.64-1-pve-5.15.64-1
  • 5.15.74-1-pve-5.15.74-1
  • 5.15.83-1-pve-5.15.83-1
  • 5.15.102-1-pve-5.15.102-1
  • 5.15.104-1-pve-5.15.104-1
  • 5.15.104-1-pve-5.15.104-2
  • 5.15.107-1-pve-5.15.107-1
  • 5.15.107-2-pve-5.15.107-2
  • 5.15.85-1-pve-5.15.85-1
  • 5.15.108-1-pve-5.15.108-1
  • 5.15.108-1-pve-5.15.108-2
  • 5.15.116-1-pve-5.15.116-1
  • 5.15.126-1-pve-5.15.126-1
  • 5.15.131-1-pve-5.15.131-1
  • 5.15.131-1-pve-5.15.131-2
  • 5.15.131-2-pve-5.15.131-3
  • 5.15.136-1-pve-5.15.136-1
  • 5.15.111-1-pve-5.15.111-1
  • 5.15.143-1-pve-5.15.143-1
  • 5.15.149-1-pve-5.15.149-1
  • 5.15.152-1-pve-5.15.152-1
  • 5.15.158-1-pve_5.15.158-1
  • 5.15.158-2-pve_5.15.158-2
Ubuntu 20.04 HWE AWS Released
57 kernels
  • 5.15.0-1026.30~20.04.2
  • 5.15.0-1022.26~20.04.1
  • 5.15.0-1023.27~20.04.1
  • 5.15.0-1021.25~20.04.1
  • 5.15.0-1020.24~20.04.1
  • 5.15.0-1017.21~20.04.1
  • 5.15.0-1019.23~20.04.1
  • 5.15.0-1014.18~20.04.1
  • 5.15.0-1015.19~20.04.1
  • 5.15.0-1018.22~20.04.1
  • 5.15.0-1027.31~20.04.1
  • 5.15.0-1028.32~20.04.1
  • 5.15.0-1030.34~20.04.1
  • 5.15.0-1031.35~20.04.1
  • 5.15.0-1033.37~20.04.1
  • 5.15.0-1034.38~20.04.1
  • 5.15.0-1035.39~20.04.1
  • 5.15.0-1036.40~20.04.1
  • 5.15.0-1037.41~20.04.1
  • 5.15.0-1038.43~20.04.1
  • 5.15.0-1039.44~20.04.1
  • 5.15.0-1040.45~20.04.1
  • 5.15.0-1041.46~20.04.1
  • 5.15.0-1043.48~20.04.1
  • 5.15.0-1044.49~20.04.1
  • 5.15.0-1045.50~20.04.1
  • 5.15.0-1047.52~20.04.1
  • 5.15.0-1048.53~20.04.1
  • 5.15.0-1049.54~20.04.1
  • 5.15.0-1050.55~20.04.1
  • 5.15.0-1051.56~20.04.1
  • 5.15.0-1052.57~20.04.1
  • 5.15.0-1053.58~20.04.1
  • 5.15.0-1055.60~20.04.1
  • 5.15.0-1056.61~20.04.1
  • 5.15.0-1057.63~20.04.1
  • 5.15.0-1058.64~20.04.1
  • 5.15.0-1061.67~20.04.1
  • 5.15.0-1062.68~20.04.1
  • 5.15.0-1063.69~20.04.1
  • 5.15.0-1064.70~20.04.1
  • 5.15.0-1065.71~20.04.1
  • 5.15.0-1066.72~20.04.1
  • 5.15.0-1067.73~20.04.1
  • 5.15.0-1068.74~20.04.1
  • 5.15.0-1069.75~20.04.1
  • 5.15.0-1070.76~20.04.1
  • 5.15.0-1071.77~20.04.1
  • 5.15.0-1072.78~20.04.1
  • 5.15.0-1073.79~20.04.1
  • 5.15.0-1075.82~20.04.1
  • 5.15.0-1077.84~20.04.1
  • 5.15.0-1080.87~20.04.1
  • 5.15.0-1081.88~20.04.1
  • 5.15.0-1082.89~20.04.1
  • 5.15.0-1083.90~20.04.1
  • 5.15.0-1084.91~20.04.1
Ubuntu 20.04 HWE Azure Released
40 kernels
  • 5.15.0-1029.36~20.04.1
  • 5.15.0-1022.27~20.04.1
  • 5.15.0-1023.29~20.04.1
  • 5.15.0-1021.26~20.04.1
  • 5.15.0-1020.25~20.04.1
  • 5.15.0-1017.20~20.04.1
  • 5.15.0-1019.24~20.04.1
  • 5.15.0-1008.9~20.04.1
  • 5.15.0-1013.16~20.04.1
  • 5.15.0-1014.17~20.04.1
  • 5.15.0-1024.30~20.04.1
  • 5.15.0-1034.41~20.04.1
  • 5.15.0-1049.56~20.04.1
  • 5.15.0-1050.57~20.04.1
  • 5.15.0-1054.62~20.04.1
  • 5.15.0-1056.64~20.04.1
  • 5.15.0-1057.65~20.04.1
  • 5.15.0-1058.66~20.04.2
  • 5.15.0-1059.67~20.04.1
  • 5.15.0-1060.69~20.04.1
  • 5.15.0-1061.70~20.04.1
  • 5.15.0-1063.72~20.04.1
  • 5.15.0-1064.73~20.04.1
  • 5.15.0-1067.76~20.04.1
  • 5.15.0-1068.77~20.04.1
  • 5.15.0-1065.74~20.04.1
  • 5.15.0-1070.79~20.04.1
  • 5.15.0-1071.80~20.04.1
  • 5.15.0-1072.81~20.04.1
  • 5.15.0-1073.82~20.04.1
  • 5.15.0-1074.83~20.04.1
  • 5.15.0-1075.84~20.04.1
  • 5.15.0-1078.87~20.04.1
  • 5.15.0-1079.88~20.04.1
  • 5.15.0-1081.90~20.04.1
  • 5.15.0-1082.91~20.04.1
  • 5.15.0-1086.95~20.04.1
  • 5.15.0-1087.96~20.04.1
  • 5.15.0-1088.97~20.04.1
  • 5.15.0-1089.98~20.04.1
Ubuntu 22.04 Released
97 kernels
  • 5.15.0-27.28
  • 5.15.0-33.34
  • 5.15.0-37.39
  • 5.15.0-39.42
  • 5.15.0-25.25
  • 5.15.0-28.29
  • 5.15.0-29.30
  • 5.15.0-30.31
  • 5.15.0-41.44
  • 5.15.0-43.46
  • 5.15.0-46.49
  • 5.15.0-35.36
  • 5.15.0-47.51
  • 5.15.0-48.54
  • 5.15.0-40.43
  • 5.15.0-50.56
  • 5.15.0-52.58
  • 5.15.0-53.59
  • 5.15.0-56.62
  • 5.15.0-54.60
  • 5.15.0-57.63
  • 5.15.0-58.64
  • 5.15.0-60.66
  • 5.15.0-67.74
  • 5.15.0-69.76
  • 5.15.0-70.77
  • 5.15.0-71.78
  • 5.15.0-72.79
  • 5.15.0-68.75
  • 5.15.0-73.80
  • 5.15.0-75.82
  • 5.15.0-76.83
  • 5.15.0-78.85
  • 5.15.0-79.86
  • 5.15.0-82.91
  • 5.15.0-83.92
  • 5.15.0-84.93
  • 5.15.0-86.96
  • 5.15.0-74.81
  • 5.15.0-87.97
  • 5.15.0-88.98
  • 5.15.0-89.99
  • 5.15.0-91.101
  • 5.15.0-92.102
  • 5.15.0-94.104
  • 5.15.0-97.107
  • 5.15.0-100.110
  • 5.15.0-101.111
  • 5.15.0-102.112
  • 5.15.0-105.115
  • 5.15.0-106.116
  • 5.15.0-107.117
  • 5.15.0-112.122
  • 5.15.0-113.123
  • 5.15.0-116.126
  • 5.15.0-117.127
  • 5.15.0-118.128
  • 5.15.0-119.129
  • 5.15.0-121.131
  • 5.15.0-122.132
  • 5.15.0-124.134
  • 5.15.0-125.135
  • 5.15.0-127.137
  • 5.15.0-130.140
  • 5.15.0-126.136
  • 5.15.0-131.141
  • 5.15.0-128.138
  • 5.15.0-133.144
  • 5.15.0-134.145
  • 5.15.0-135.146
  • 5.15.0-136.147
  • 5.15.0-138.148
  • 5.15.0-139.149
  • 5.15.0-140.150
  • 5.15.0-141.151
  • 5.15.0-142.152
  • 5.15.0-143.153
  • 5.15.0-144.157
  • 5.15.0-151.161
  • 5.15.0-152.162
  • 5.15.0-153.163
  • 5.15.0-156.166
  • 5.15.0-157.167
  • 5.15.0-160.170
  • 5.15.0-161.171
  • 5.15.0-163.173
  • 5.15.0-164.174
  • 5.15.0-168.178
  • 5.15.0-170.180
  • 5.15.0-171.181
  • 5.15.0-173.183
  • 5.15.0-174.184
  • 5.15.0-176.186
  • 5.15.0-177.187
  • 5.15.0-179.189
  • 5.15.0-181.191
  • 5.15.0-185.195
Ubuntu 22.04 AWS Released
88 kernels
  • 5.15.0-1005.7
  • 5.15.0-1008.10
  • 5.15.0-1011.14
  • 5.15.0-1013.17
  • 5.15.0-1015.19
  • 5.15.0-1017.21
  • 5.15.0-1009.11
  • 5.15.0-1020.24
  • 5.15.0-1021.25
  • 5.15.0-1022.26
  • 5.15.0-1023.27
  • 5.15.0-1026.30
  • 5.15.0-1004.6
  • 5.15.0-1014.18
  • 5.15.0-1018.22
  • 5.15.0-1024.29
  • 5.15.0-1027.31
  • 5.15.0-1028.32
  • 5.15.0-1030.34
  • 5.15.0-1031.35
  • 5.15.0-1033.37
  • 5.15.0-1034.38
  • 5.15.0-1035.39
  • 5.15.0-1036.40
  • 5.15.0-1032.36
  • 5.15.0-1037.41
  • 5.15.0-1038.43
  • 5.15.0-1039.44
  • 5.15.0-1040.45
  • 5.15.0-1042.47
  • 5.15.0-1043.48
  • 5.15.0-1044.49
  • 5.15.0-1045.50
  • 5.15.0-1047.52
  • 5.15.0-1048.53
  • 5.15.0-1049.54
  • 5.15.0-1050.55
  • 5.15.0-1051.56
  • 5.15.0-1052.57
  • 5.15.0-1053.58
  • 5.15.0-1055.60
  • 5.15.0-1056.61
  • 5.15.0-1057.63
  • 5.15.0-1060.66
  • 5.15.0-1061.67
  • 5.15.0-1062.68
  • 5.15.0-1063.69
  • 5.15.0-1064.70
  • 5.15.0-1065.71
  • 5.15.0-1066.72
  • 5.15.0-1067.73
  • 5.15.0-1068.74
  • 5.15.0-1069.75
  • 5.15.0-1070.76
  • 5.15.0-1071.77
  • 5.15.0-1072.78
  • 5.15.0-1073.79
  • 5.15.0-1076.83
  • 5.15.0-1078.85
  • 5.15.0-1079.86
  • 5.15.0-1080.87
  • 5.15.0-1081.88
  • 5.15.0-1082.89
  • 5.15.0-1083.90
  • 5.15.0-1084.91
  • 5.15.0-1085.92
  • 5.15.0-1086.93
  • 5.15.0-1087.94
  • 5.15.0-1088.95
  • 5.15.0-1089.96
  • 5.15.0-1090.97
  • 5.15.0-1091.98
  • 5.15.0-1092.99
  • 5.15.0-1093.100
  • 5.15.0-1095.102
  • 5.15.0-1096.103
  • 5.15.0-1097.104
  • 5.15.0-1098.105
  • 5.15.0-1099.106
  • 5.15.0-1100.107
  • 5.15.0-1101.108
  • 5.15.0-1103.110
  • 5.15.0-1104.111
  • 5.15.0-1105.112
  • 5.15.0-1106.113
  • 5.15.0-1108.115
  • 5.15.0-1109.116
  • 5.15.0-1111.118
Ubuntu 22.04 Azure Released
78 kernels
  • 5.15.0-1005.6
  • 5.15.0-1007.8
  • 5.15.0-1010.12
  • 5.15.0-1012.15
  • 5.15.0-1014.17
  • 5.15.0-1017.20
  • 5.15.0-1008.9
  • 5.15.0-1019.24
  • 5.15.0-1020.25
  • 5.15.0-1021.26
  • 5.15.0-1022.27
  • 5.15.0-1003.4
  • 5.15.0-1013.16
  • 5.15.0-1023.29
  • 5.15.0-1029.36
  • 5.15.0-1024.30
  • 5.15.0-1034.41
  • 5.15.0-1035.42
  • 5.15.0-1036.43
  • 5.15.0-1037.44
  • 5.15.0-1038.45
  • 5.15.0-1039.46
  • 5.15.0-1040.47
  • 5.15.0-1041.48
  • 5.15.0-1042.49
  • 5.15.0-1045.52
  • 5.15.0-1046.53
  • 5.15.0-1047.54
  • 5.15.0-1049.56
  • 5.15.0-1044.51
  • 5.15.0-1050.57
  • 5.15.0-1051.59
  • 5.15.0-1052.60
  • 5.15.0-1053.61
  • 5.15.0-1054.62
  • 5.15.0-1056.64
  • 5.15.0-1057.65
  • 5.15.0-1058.66
  • 5.15.0-1059.67
  • 5.15.0-1060.69
  • 5.15.0-1061.70
  • 5.15.0-1063.72
  • 5.15.0-1064.73
  • 5.15.0-1066.75
  • 5.15.0-1067.76
  • 5.15.0-1068.77
  • 5.15.0-1070.79
  • 5.15.0-1071.80
  • 5.15.0-1072.81
  • 5.15.0-1073.82
  • 5.15.0-1074.83
  • 5.15.0-1075.84
  • 5.15.0-1078.87
  • 5.15.0-1079.88
  • 5.15.0-1081.90
  • 5.15.0-1082.91
  • 5.15.0-1084.93
  • 5.15.0-1086.95
  • 5.15.0-1087.96
  • 5.15.0-1088.97
  • 5.15.0-1089.98
  • 5.15.0-1090.99
  • 5.15.0-1091.100
  • 5.15.0-1092.101
  • 5.15.0-1094.103
  • 5.15.0-1095.104
  • 5.15.0-1096.105
  • 5.15.0-1097.106
  • 5.15.0-1098.107
  • 5.15.0-1101.110
  • 5.15.0-1102.111
  • 5.15.0-1099.108
  • 5.15.0-1103.112
  • 5.15.0-1109.118
  • 5.15.0-1110.119
  • 5.15.0-1111.120
  • 5.15.0-1114.123
  • 5.15.0-1116.125
Ubuntu 24.04 Released
46 kernels
  • 6.8.0-35.35
  • 6.8.0-38.38
  • 6.8.0-36.36
  • 6.8.0-39.39
  • 6.8.0-40.40
  • 6.8.0-41.41
  • 6.8.0-44.44
  • 6.8.0-45.45
  • 6.8.0-31.31
  • 6.8.0-47.47
  • 6.8.0-48.48
  • 6.8.0-49.49
  • 6.8.0-50.51
  • 6.8.0-51.52
  • 6.8.0-52.53
  • 6.8.0-54.56
  • 6.8.0-55.57
  • 6.8.0-53.55
  • 6.8.0-56.58
  • 6.8.0-57.59
  • 6.8.0-58.60
  • 6.8.0-59.61
  • 6.8.0-60.63
  • 6.8.0-62.65
  • 6.8.0-63.66
  • 6.8.0-64.67
  • 6.8.0-71.71
  • 6.8.0-78.78
  • 6.8.0-79.79
  • 6.8.0-84.84
  • 6.8.0-85.85
  • 6.8.0-83.83
  • 6.8.0-86.87
  • 6.8.0-87.88
  • 6.8.0-88.89
  • 6.8.0-90.91
  • 6.8.0-94.96
  • 6.8.0-100.100
  • 6.8.0-101.101
  • 6.8.0-106.106
  • 6.8.0-107.107
  • 6.8.0-110.110
  • 6.8.0-111.111
  • 6.8.0-117.117
  • 6.8.0-124.124
  • 6.8.0-134.134