CVE-2026-72076: Input: ims-pcu - fix out-of-bounds read in ims_pcu_irq() debug logging
In the Linux kernel, the following vulnerability has been resolved:
Input: ims-pcu - fix out-of-bounds read in imspcuirq() debug logging
The debug logging in imspcuirq() unconditionally prints data from pcu->urbinbuf. However, if the interrupt fired for pcu->urbctrl, the actual data resides in pcu->urbctrlbuf. If urb->actuallength for the control URB exceeds pcu->maxinsize, this leads to an out-of-bounds read.
Fix this by printing from the correct buffer associated with the URB.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
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ubuntu/linux-awsto a version that resolves this vulnerability.Fixed in 6.8.0-1067.70 - Upgrade
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ubuntu/linux-azureto a version that resolves this vulnerability.Fixed in 6.8.0-1071.79 - Upgrade
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ubuntu/linux-oracleto a version that resolves this vulnerability.Fixed in 6.8.0-1064.67 - Upgrade
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ubuntu/linux-riscv-7.0to a version that resolves this vulnerability.Fixed in 7.0.0-38.38.1~24.04.1 - Upgrade
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ubuntu/linux-bluefieldto a version that resolves this vulnerability.Fixed in 6.8.0-1033.38 - Upgrade
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ubuntu/linux-realtimeto a version that resolves this vulnerability.Fixed in 6.8.1-1062.63 - Upgrade
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ubuntu/linux-aws-fipsto a version that resolves this vulnerability.Fixed in 6.8.0-1067.70+fips1 - Upgrade
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ubuntu/linux-azure-fipsto a version that resolves this vulnerability.Fixed in 6.8.0-1071.79+fips1 - Upgrade
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ubuntu/linux-fipsto a version that resolves this vulnerability.Fixed in 6.8.0-147.147+fips1 - Upgrade
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ubuntu/linux-gcp-fipsto a version that resolves this vulnerability.Fixed in 6.8.0-1071.79+fips1 - Upgrade
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ubuntu/linuxto a version that resolves this vulnerability.Fixed in 7.0.0-38.38 - Upgrade
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ubuntu/linux-awsto a version that resolves this vulnerability.Fixed in 7.0.0-1014.14 - Upgrade
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ubuntu/linux-azureto a version that resolves this vulnerability.Fixed in 7.0.0-1017.17 - Upgrade
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ubuntu/linux-azure-fdeto a version that resolves this vulnerability.Fixed in 7.0.0-1016.16 - Upgrade
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ubuntu/linux-gcpto a version that resolves this vulnerability.Fixed in 7.0.0-1014.14 - Upgrade
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ubuntu/linux-gketo a version that resolves this vulnerability.Fixed in 7.0.0-1008.9 - Upgrade
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ubuntu/linux-ibmto a version that resolves this vulnerability.Fixed in 7.0.0-1015.15 - Upgrade
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ubuntu/linux-oracleto a version that resolves this vulnerability.Fixed in 7.0.0-1013.13 - Upgrade
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ubuntu/linux-realtimeto a version that resolves this vulnerability.Fixed in 7.0.0-38.38.1 - Upgrade
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ubuntu/linux-riscvto a version that resolves this vulnerability.Fixed in 7.0.0-38.38.1 - Compensating control
Update ims_pcu_irq() debug logging to print from the buffer associated with the URB: use pcu->urb_ctrl_buf when the interrupt fired for pcu->urb_ctrl, instead of unconditionally reading pcu->urb_in_buf.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-72076?
The severity of CVE-2026-72076 is rated at 15.
What is the vulnerability CVE-2026-72076 about?
CVE-2026-72076 addresses an out-of-bounds read issue in the ims_pcu_irq() debug logging within the Linux kernel.
How do I fix CVE-2026-72076?
To fix CVE-2026-72076, update your Linux kernel to the latest patched version that resolves this vulnerability.
Who is affected by CVE-2026-72076?
Any systems running the vulnerable versions of the Linux kernel with the ims-pcu driver are at risk from CVE-2026-72076.
What can exploitation of CVE-2026-72076 lead to?
Exploitation of CVE-2026-72076 may lead to unauthorized access or crashes due to the out-of-bounds read.