CVE-2024-49936

HIGH EPSS 19.0%
Published Oct 21, 20241y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Oct 21, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: net/xen-netback: prevent UAF in xenvif_flush_hash() During the list_for_each_entry_rcu iteration call of xenvif_flush_hash, kfree_rcu does not exist inside the rcu read critical section, so if kfree_rcu is called when the rcu grace period ends during the iteration, UAF occurs when accessing head->next after the entry becomes free. Therefore, to solve this, you need to change it to list_for_each_entry_safe.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
19.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel* <5.10.227
linuxlinux_kernel*≥5.11  –  <5.15.168
linuxlinux_kernel*≥5.16  –  <6.1.113
linuxlinux_kernel*≥6.2  –  <6.6.55
linuxlinux_kernel*≥6.7  –  <6.10.14
linuxlinux_kernel*≥6.11  –  <6.11.3

References 10

  • git.kernel.org https://git.kernel.org/stable/c/0fa5e94a1811d68fbffa0725efe6d4ca62c03d12
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/143edf098b80669d05245b2f2367dd156a83a2c5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3c4423b0c4b98213b3438e15061e1d08220e6982
  • git.kernel.org https://git.kernel.org/stable/c/54d8639af5568fc41c0e274fc3ec9cf86c59fcbb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a0465723b8581cad27164c9073fd780904cd22d4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d408889d4b54f5501e4becc4dbbb9065143fbf4e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/efcff6ce7467f01f0753609f420333f3f2ceceda
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0fa5e94a1811d68fbffa0725efe6d4ca62c03d12
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/143edf098b80669d05245b2f2367dd156a83a2c5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/54d8639af5568fc41c0e274fc3ec9cf86c59fcbb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a0465723b8581cad27164c9073fd780904cd22d4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d408889d4b54f5501e4becc4dbbb9065143fbf4e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/efcff6ce7467f01f0753609f420333f3f2ceceda
    Patch