PT-2026-26048 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-04-20 · CVE-2026-23245

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description The Linux kernel contains an issue in the networking scheduler (net/sched) related to the act gate action. Specifically, the act gate action can be replaced while a hrtimer callback or dump path is traversing the schedule list. This can lead to inconsistencies when handling the schedule list. The resolution involves converting parameters to an RCU-protected snapshot and swapping updates under tcf lock, freeing the previous snapshot via call rcu(). When a replacement omits the entry list, the existing schedule is preserved to maintain the effective state.

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

Exploit

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

BDU:2026-04645

CVE-2026-23245

OESA-2026-1862

OESA-2026-1863

OESA-2026-1864

Affected Products

Linux Kernel

References · 79

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23245.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-23171 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23368 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23392 · Security Note
• https://osv.dev/vulnerability/OESA-2026-1864 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23240 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-23245 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1862 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23409 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31788 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23399 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23393 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23391 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23245 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23365 · Security Note