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Review reviewHigh

CVE-2023-54186

Linux

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_...

CVSS
7.8
EPSS
0.13%
3.05% percentile
CISA KEV
Not listed
Published
2025.12.30
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.13%
Technical severityCVSS 7.8

Vulnerability overview

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_...

Affected product and versions

Product
Linux
Affected versions
>= 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 < 0e61a7432fcd4bca06f05b7f1c7d7cb461880fe2, >= 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 < 4f9c0a7c272626cb6716ffc7800e8c73260cdce6, >= 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 < ff466f77d0a56719979c4234abd412abd98eae8f, >= 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 < fc0e18f95c88435bd8a1ceb540243cd7fbcd9781, >= 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 < 08bd1be1c716fd50a7df48f82dcbc59a103082b5, >= 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 < 54ee23e4ab263a495ace1eed43d3883212ece17f, >= 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 < d8f28269dd4bf9b55c3fb376ae31512730a96fce, >= 4.19
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available