PT-2026-40696 · Git+3 · Kernel+94

Published 2026-05-13 · Updated 2026-05-15 · CVE-2026-43489

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 An issue exists in the liveupdate component where the system fails to record the status of failed retrieve attempts on a LUO file. When the luo retrieve file() function fails, it returns an error without storing the attempt or the error code. This allows userspace to trigger the 'LIVEUPDATE SESSION RETRIEVE FD' ioctl again. Such retries are problematic because the file may be in an unexpected state or serialization data structures may have been freed, leading to potential system instability or crashes when attempting to access or free them again. For instance, a retry might cause the kho restore folio() function to be called on an already restored folio, which is an invalid operation. Additionally, the finish() callback may incorrectly assume a retrieve was never attempted during session close, leading to similar issues with data structure access.

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

Exploit

Related Identifiers

CVE-2026-43489

Affected Products

Kernel

Linux

Linux-Allwinner-5.19

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-6.14

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-6.2

Linux-Azure-6.5

Linux-Azure-Edge

Linux-Azure-Fde

Linux-Azure-Fde-5.19

Linux-Azure-Fde-6.2

Linux-Bluefield

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-6.14

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-6.14

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-Nvidia-7.0

Linux-Nvidia-Bos

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-6.14

Linux-Oem-6.5

Linux-Oem-6.8

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-6.5

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-6.5

Linux-Starfive-5.19

Linux-Starfive-6.2

Linux-Starfive-6.5

Linux Kernel

References · 13

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43489.json · Exploit
• https://cve.org/CVERecord?id=CVE-2026-43489 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-43489 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-43489 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43489 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43489 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43489 · Vendor Advisory
• https://git.kernel.org/stable/c/f85b1c6af5bc3872f994df0a5688c1162de07a62 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43489 · Vendor Advisory
• https://git.kernel.org/stable/c/1d3ad69484dc1cc53be62d2554e7ef038a627af9 · Patch
• https://git.kernel.org/linus/f85b1c6af5bc3872f994df0a5688c1162de07a62 · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://twitter.com/hetmehtaa/status/2055151398283837677 · Twitter Post