CVE-2026-72076

Kernel memory disclosure via wrong URB buffer logging

Published Aug 15, 2026 · Updated Aug 15, 2026

Out-of-bounds read in the Linux kernel ims-pcu driver allows physically proximate attackers to disclose adjacent kernel memory through debug logging. The ims_pcu_irq() debug path always prints pcu->urb_in_buf even when the interrupt belongs to the control URB, whose data is held in pcu->urb_ctrl_buf; a control transfer longer than pcu->max_in_size therefore reads past the input buffer. Exploitation requires access to a compatible USB device path, and the exposed bytes enter kernel debug output rather than a network response.

CVSS severity3.5
Low
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds read in the Linux kernel ims-pcu driver allows physically proximate attackers to disclose adjacent kernel memory through debug logging. The ims_pcu_irq() debug path always prints pcu->urb_in_buf even when the interrupt belongs to the control URB, whose data is held in pcu->urb_ctrl_buf; a control transfer longer than pcu->max_in_size therefore reads past the input buffer. Exploitation requires access to a compatible USB device path, and the exposed bytes enter kernel debug output rather than a network response.

The record

CVE
CVE-2026-72076
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.10
  2. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <20fbf3ca0259d00664d1ede88837e1f11b49a88e
  3. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <3fd7c0ace245334f2a0bd29fdcb680ad56e9b275
  4. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <403b0a6970b1084bb27907c0f8225801fdd0fe1d
  5. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <4d2553e9a76a11500ec670cbe16b7fd3da4832de
  6. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <9c964fc9507aeab74376ba9f892cf84ad6950dfe
  7. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <b746e853721dee91e4234c033d1b90f4605705bb
  8. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <e6153407d7edabc6ff98f0fda415d556c0bcb57a
  9. Affected versionversion=628329d52474323938a03826941e166bc7c8eff4 <f97bfc1a0766802a99167b3dc62d1ee7dca929fe

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.10; version=628329d52474323938a03826941e166bc7c8eff4 <20fbf3ca0259d00664d1ede88837e1f11b49a88e; version=628329d52474323938a03826941e166bc7c8eff4 <3fd7c0ace245334f2a0bd29fdcb680ad56e9b275; version=628329d52474323938a03826941e166bc7c8eff4 <403b0a6970b1084bb27907c0f8225801fdd0fe1d; version=628329d52474323938a03826941e166bc7c8eff4 <4d2553e9a76a11500ec670cbe16b7fd3da4832de; version=628329d52474323938a03826941e166bc7c8eff4 <9c964fc9507aeab74376ba9f892cf84ad6950dfe; version=628329d52474323938a03826941e166bc7c8eff4 <b746e853721dee91e4234c033d1b90f4605705bb; version=628329d52474323938a03826941e166bc7c8eff4 <e6153407d7edabc6ff98f0fda415d556c0bcb57a; version=628329d52474323938a03826941e166bc7c8eff4 <f97bfc1a0766802a99167b3dc62d1ee7dca929fe

Published CVSS scores

3.5SUSECVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
3.5Amazon LinuxCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo