PT-2026-6137 · Git+3 · Kernel+98

Published 2026-01-01 · Updated 2026-02-04 · CVE-2026-23067

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue involves a signedness bug in the arm lpae unmap() function within the io-pgtable-arm component of the Linux kernel. The function incorrectly returns a negative error code (-ENOENT) as a size t value, which is an unsigned type. This results in a corrupted value propagating through the call chain, potentially leading to an IOVA address overflow in the iommu unmap() loop and triggering a BUG ON condition in the iommu pgsize() function due to invalid address alignment. The fix involves returning 0 instead of -ENOENT, aligning the behavior with other io-pgtable implementations like io-pgtable-arm-v7s and io-pgtable-dart.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

CVE-2026-23067

Affected Products

Kernel

Linux

Linux-Allwinner-5.19

Linux-Aws

Linux-Aws-5.0

Linux-Aws-5.11

Linux-Aws-5.13

Linux-Aws-5.19

Linux-Aws-5.3

Linux-Aws-5.8

Linux-Aws-6.17

Linux-Aws-6.2

Linux-Aws-6.5

Linux-Azure

Linux-Azure-5.11

Linux-Azure-5.13

Linux-Azure-5.19

Linux-Azure-5.3

Linux-Azure-5.8

Linux-Azure-6.11

Linux-Azure-6.17

Linux-Azure-6.2

Linux-Azure-6.5

Linux-Azure-Edge

Linux-Azure-Fde

Linux-Azure-Fde-5.19

Linux-Azure-Fde-6.17

Linux-Azure-Fde-6.2

Linux-Gcp

Linux-Gcp-5.11

Linux-Gcp-5.13

Linux-Gcp-5.19

Linux-Gcp-5.3

Linux-Gcp-5.8

Linux-Gcp-6.11

Linux-Gcp-6.17

Linux-Gcp-6.2

Linux-Gcp-6.5

Linux-Gke

Linux-Gke-4.15

Linux-Gkeop-5.15

Linux-Gke-5.4

Linux-Gkeop

Linux-Hwe

Linux-Hwe-5.11

Linux-Hwe-5.13

Linux-Hwe-5.19

Linux-Hwe-5.8

Linux-Hwe-6.11

Linux-Hwe-6.17

Linux-Hwe-6.2

Linux-Hwe-6.5

Linux-Hwe-Edge

Linux-Intel-5.13

Linux-Intel-Iot-Realtime

Linux-Lowlatency-Hwe-5.19

Linux-Lowlatency-Hwe-6.11

Linux-Lowlatency-Hwe-6.2

Linux-Lowlatency-Hwe-6.5

Linux-Nvidia-6.11

Linux-Nvidia-6.2

Linux-Nvidia-6.5

Linux-Oem

Linux-Oem-5.10

Linux-Oem-5.13

Linux-Oem-5.14

Linux-Oem-5.17

Linux-Oem-5.6

Linux-Oem-6.0

Linux-Oem-6.1

Linux-Oem-6.11

Linux-Oem-6.17

Linux-Oem-6.5

Linux-Oem-6.8

Linux-Oracle

Linux-Oracle-5.0

Linux-Oracle-5.11

Linux-Oracle-5.13

Linux-Oracle-5.3

Linux-Oracle-5.8

Linux-Oracle-6.14

Linux-Oracle-6.17

Linux-Oracle-6.5

Linux-Raspi

Linux-Raspi-Realtime

Linux-Raspi2

Linux-Realtime

Linux-Realtime-6.14

Linux-Riscv

Linux-Riscv-5.11

Linux-Riscv-5.19

Linux-Riscv-5.8

Linux-Riscv-6.14

Linux-Riscv-6.17

Linux-Riscv-6.5

Linux-Starfive-5.19

Linux-Starfive-6.2

Linux-Starfive-6.5

Linux Kernel

References · 12

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23067.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2026-23067 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23067 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23067 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23067 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23067 · Security Note
• https://git.kernel.org/stable/c/374e7af67d9d9d6103c2cfc8eb32abfecf3a2fd8 · Patch
• https://ubuntu.com/security/CVE-2026-23067 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23067 · Vendor Advisory
• https://git.kernel.org/stable/c/41ec6988547819756fb65e94fc24f3e0dddf84ac · Patch
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://git.kernel.org/linus/374e7af67d9d9d6103c2cfc8eb32abfecf3a2fd8 · Note