CVE-2023-54186

usb: typec: altmodes/displayport: fix pin_assignment_show

State: Published
Severity: 7.8 High
Published: Dec 30, 2025
Updated: Aug 5, 2026
Reserved: Dec 30, 2025

Description

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

usb: typec: altmodes/displayport: fix pin_assignment_show

This patch fixes negative indexing of buf array in pin_assignment_show when get_current_pin_assignments returns 0 i.e. no compatible pin assignments are found.

BUG: KASAN: use-after-free in pin_assignment_show+0x26c/0x33c ... Call trace: dump_backtrace+0x110/0x204 dump_stack_lvl+0x84/0xbc print_report+0x358/0x974 kasan_report+0x9c/0xfc __do_kernel_fault+0xd4/0x2d4 do_bad_area+0x48/0x168 do_tag_check_fault+0x24/0x38 do_mem_abort+0x6c/0x14c el1_abort+0x44/0x68 el1h_64_sync_handler+0x64/0xa4 el1h_64_sync+0x78/0x7c pin_assignment_show+0x26c/0x33c dev_attr_show+0x50/0xc0

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before 0e61a7432fcd4bca06f05b7f1c7d7cb461880fe2Affected 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before 4f9c0a7c272626cb6716ffc7800e8c73260cdce6Affected 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before ff466f77d0a56719979c4234abd412abd98eae8fAffected 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before fc0e18f95c88435bd8a1ceb540243cd7fbcd9781Affected 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before 08bd1be1c716fd50a7df48f82dcbc59a103082b5Affected 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before 54ee23e4ab263a495ace1eed43d3883212ece17fAffected 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before d8f28269dd4bf9b55c3fb376ae31512730a96fceAffected
LinuxLinux	4.19Affected before 4.19Not affected 4.19.284 through 4.19.Not affected 5.4.244 through 5.4.Not affected 5.10.181 through 5.10.Not affected 5.15.113 through 5.15.Not affected 6.1.30 through 6.1.Not affected 6.3.4 through 6.3.Not affected 6.4 and laterNot affected

Product

Versions

LinuxLinux

0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before 0e61a7432fcd4bca06f05b7f1c7d7cb461880fe2Affected
0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before 4f9c0a7c272626cb6716ffc7800e8c73260cdce6Affected
0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before ff466f77d0a56719979c4234abd412abd98eae8fAffected
0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before fc0e18f95c88435bd8a1ceb540243cd7fbcd9781Affected
0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before 08bd1be1c716fd50a7df48f82dcbc59a103082b5Affected
0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before 54ee23e4ab263a495ace1eed43d3883212ece17fAffected
0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 to before d8f28269dd4bf9b55c3fb376ae31512730a96fceAffected

LinuxLinux

4.19Affected
before 4.19Not affected
4.19.284 through 4.19.*Not affected
5.4.244 through 5.4.*Not affected
5.10.181 through 5.10.*Not affected
5.15.113 through 5.15.*Not affected
6.1.30 through 6.1.*Not affected
6.3.4 through 6.3.*Not affected
6.4 and laterNot affected

References

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