PT-2026-43838 · Git+4 · Kernel+93

CVE-2026-45971 · Published 2026-05-27 · Updated 2026-05-28

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 BPF (Berkeley Packet Filter) subsystem where the lack of limits on BPF program signature sizes allows for potential abuse. By passing excessive size values, an attacker can force the kernel into expensive memory allocation paths via kmalloc large or vmalloc (virtual memory allocation), which can lead to system resource exhaustion.

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

Exploit

Related Identifiers

CVE-2026-45971

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-Lts

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-6.14

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 · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45971.json · Exploit
• https://ubuntu.com/security/CVE-2026-45971 · Vendor Advisory
• https://git.kernel.org/stable/c/ea1535e28bb3773fc0b3cbd1f3842b808016990c · Patch
• https://osv.dev/vulnerability/CVE-2026-45971 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-45971 · Vendor Advisory
• https://git.kernel.org/stable/c/5835a077c6f5c565d525eaca9fac01572b97a9b9 · Patch
• https://cve.org/CVERecord?id=CVE-2026-45971 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-45971 · Vendor Advisory
• https://git.kernel.org/stable/c/eb8166c79097996396468a341de258a798789d36 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-45971 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45971 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-45971 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://docs.bell-sw.com/security/cves/CVE-2026-45971 · Note
• https://git.kernel.org/linus/ea1535e28bb3773fc0b3cbd1f3842b808016990c · Note