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Vulnerabilities

Vulnerability · CVE-2025-71305

In the Linux kernel, the following vulnerability has been resolved: drm/display/dp_mst: Add protection against 0 vcpi When releasing a timeslot there is a slight chanc…

Published May 27, 2026 · catalog updated Oct 14, 2026 · linux kernel

Check if you run it

No confirmed exploitation is on record for CVE-2025-71305. EPSS is 0.16%. Act only if a listed version of linux kernel is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.16%
Remediation
Advisory link
Affected products
cpe linux/linux kernel

In the Linux kernel, the following vulnerability has been resolved: drm/display/dp_mst: Add protection against 0 vcpi When releasing a timeslot there is a slight chance we may end up with the wrong payload mask due to overflow if the delayed_destroy_work ends up coming into play after a DP 2.1 monitor gets disconnected which causes vcpi to become 0 then we try to make the payload = ~BIT(vcpi - 1) which is a negative shift. VCPI id should never really be 0 hence skip changing the payload mask if VCPI is 0. Otherwise it leads to [515.287237] xe 0000:03:00.0: [drm:drm_dp_mst_get_port_malloc [drm_display_helper]] port ffff888126ce9000 (3) [515.287267] -----------[ cut here ]----------- [515.287268] UBSAN: shift-out-of-bounds in ../drivers/gpu/drm/display/drm_dp_mst_topology.c:4575:36 [515.287271] shift exponent -1 is negative [515.287275] CPU: 7 UID: 0 PID: 3108 Comm: kworker/u64:33 Tainted: G S U 6.17.0-rc6-lgci-xe-xe-3795-3e79699fa1b216e92+ #1 PREEMPT(voluntary) [515.287279] Tainted: [S]=CPU_OUT_OF_SPEC, [U]=USER [515.287279] Hardware name: ASUS System Product Name/PRIME Z790-P WIFI, BIOS 1645 03/15/2024 [515.287281] Workqueue: drm_dp_mst_wq drm_dp_delayed_destroy_work [drm_display_helper] [515.287303] Call Trace: [515.287304] [515.287306] dump_stack_lvl+0xc1/0xf0 [515.287313] dump_stack+0x10/0x20 [515.287316] __ubsan_handle_shift_out_of_bounds+0x133/0x2e0 [515.287324] ? drm_atomic_get_private_obj_state+0x186/0x1d0 [515.287333] drm_dp_atomic_release_time_slots.cold+0x17/0x3d [drm_display_helper] [515.287355] mst_connector_atomic_check+0x159/0x180 [xe] [515.287546] drm_atomic_helper_check_modeset+0x4d9/0xfa0 [515.287550] ? __ww_mutex_lock.constprop.0+0x6f/0x1a60 [515.287562] intel_atomic_check+0x119/0x2b80 [xe] [515.287740] ? find_held_lock+0x31/0x90 [515.287747] ? lock_release+0xce/0x2a0 [515.287754] drm_atomic_check_only+0x6a2/0xb40 [515.287758] ? drm_atomic_add_affected_connectors+0x12b/0x140 [515.287765] drm_atomic_commit+0x6e/0xf0 [515.287766] ? _pfx__drm_printfn_

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  • cpe linux/linux kernelversion unspecified

How to fix CVE-2025-71305

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-71305. EPSS is 0.16%. Act only if a listed version of linux kernel is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.16%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 27, 2026 · NIST NVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: drm/display/dp_mst: Add protection against 0 vcpi When releasing a timeslot there is a slight chance we may end up with the wrong payload mask due to overflow if the delayed_destroy_work ends up coming into play after a DP 2.1 monitor gets disconnected which causes vcpi to become 0 then we try to make the payload = ~BIT(vcpi - 1)

  2. Oct 14, 2026 · NIST NVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: drm/display/dp_mst: Add protection against 0 vcpi When releasing a timeslot there is a slight chance we may end up with the wrong payload mask due to overflow if the delayed_destroy_work ends up coming into play after a DP 2.1 monitor gets disconnected which causes vcpi to become 0 then we try to make the payload = ~BIT(vcpi - 1)

Sources

  • CVE.orgVulnerability recordCVE-2025-71305

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-71305

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2025-71305

    In the Linux kernel, the following vulnerability has been resolved: drm/display/dp_mst: Add protection against 0 vcpi When releasing a timeslot there is a slight chance we may end up with the wrong payload mask due to overflow if the delayed_destroy_work ends up coming into pla

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.