In the Linux kernel, the following vulnerability has been resolved:
coresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()
commit 6f755e85c332 ("coresight: Add helper for inserting synchronization
packets") removed trailing '\0' from barrier_pkt array and updated the
call sites like etb_update_buffer() to have proper checks for barrier_pkt
size before read but missed updating tmc_update_etf_buffer() which still
reads barrier_pkt past the array size resulting in KASAN out-of-bounds
bug. Fix this by adding a check for barrier_pkt size before accessing
like it is done in etb_update_buffer().
BUG: KASAN: global-out-of-bounds in tmc_update_etf_buffer+0x4b8/0x698
Read of size 4 at addr ffffffd05b7d1030 by task perf/2629
Call trace:
dump_backtrace+0x0/0x27c
show_stack+0x20/0x2c
dump_stack+0x11c/0x188
print_address_description+0x3c/0x4a4
__kasan_report+0x140/0x164
kasan_report+0x10/0x18
__asan_report_load4_noabort+0x1c/0x24
tmc_update_etf_buffer+0x4b8/0x698
etm_event_stop+0x248/0x2d8
etm_event_del+0x20/0x2c
event_sched_out+0x214/0x6f0
group_sched_out+0xd0/0x270
ctx_sched_out+0x2ec/0x518
__perf_event_task_sched_out+0x4fc/0xe6c
__schedule+0x1094/0x16a0
preempt_schedule_irq+0x88/0x170
arm64_preempt_schedule_irq+0xf0/0x18c
el1_irq+0xe8/0x180
perf_event_exec+0x4d8/0x56c
setup_new_exec+0x204/0x400
load_elf_binary+0x72c/0x18c0
search_binary_handler+0x13c/0x420
load_script+0x500/0x6c4
search_binary_handler+0x13c/0x420
exec_binprm+0x118/0x654
__do_execve_file+0x77c/0xba4
__arm64_compat_sys_execve+0x98/0xac
el0_svc_common+0x1f8/0x5e0
el0_svc_compat_handler+0x84/0xb0
el0_svc_compat+0x10/0x50
The buggy address belongs to the variable:
barrier_pkt+0x10/0x40
Memory state around the buggy address:
ffffffd05b7d0f00: fa fa fa fa 04 fa fa fa fa fa fa fa 00 00 00 00
ffffffd05b7d0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffffd05b7d1000: 00 00 00 00 00 00 fa fa fa fa fa fa 00 00 00 03
^
ffffffd05b7d1080: fa fa fa fa 00 02 fa fa fa fa fa fa 03 fa fa fa
ffffffd05b7d1100: fa fa fa fa 00 00 00 00 05 fa fa fa fa fa fa fa
==================================================================
References
Configurations
Configuration 1 (hide)
|
History
06 Mar 2025, 12:53
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/0115687be7b13993066aef602253a53d55f5b11f - Patch | |
| References | () https://git.kernel.org/stable/c/04bd77ef4f4d9fc6102023b85f4590fc2130aac5 - Patch | |
| References | () https://git.kernel.org/stable/c/35c1c4bd2d59ad734129d4e232af9d1098023918 - Patch | |
| References | () https://git.kernel.org/stable/c/5fae8a946ac2df879caf3f79a193d4766d00239b - Patch | |
| References | () https://git.kernel.org/stable/c/733d4d95c0101d5f277b8e4910411d016e49a9dc - Patch | |
| References | () https://git.kernel.org/stable/c/ef0a06acc6b16388640ad367eedfa2a17f1945db - Patch | |
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
| CWE | CWE-125 |
21 Nov 2024, 06:35
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/0115687be7b13993066aef602253a53d55f5b11f - | |
| References | () https://git.kernel.org/stable/c/04bd77ef4f4d9fc6102023b85f4590fc2130aac5 - | |
| References | () https://git.kernel.org/stable/c/35c1c4bd2d59ad734129d4e232af9d1098023918 - | |
| References | () https://git.kernel.org/stable/c/5fae8a946ac2df879caf3f79a193d4766d00239b - | |
| References | () https://git.kernel.org/stable/c/733d4d95c0101d5f277b8e4910411d016e49a9dc - | |
| References | () https://git.kernel.org/stable/c/ef0a06acc6b16388640ad367eedfa2a17f1945db - | |
| Summary |
|
21 May 2024, 15:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-05-21 15:15
Updated : 2025-03-06 12:53
NVD link : CVE-2021-47346
Mitre link : CVE-2021-47346
CVE.ORG link : CVE-2021-47346
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read