CVE-2024-45016

MEDIUM EPSS 14.9%
Published Sep 11, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 11, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: netem: fix return value if duplicate enqueue fails There is a bug in netem_enqueue() introduced by commit 5845f706388a ("net: netem: fix skb length BUG_ON in __skb_to_sgvec") that can lead to a use-after-free. This commit made netem_enqueue() always return NET_XMIT_SUCCESS when a packet is duplicated, which can cause the parent qdisc's q.qlen to be mistakenly incremented. When this happens qlen_notify() may be skipped on the parent during destruction, leaving a dangling pointer for some classful qdiscs like DRR. There are two ways for the bug happen: - If the duplicated packet is dropped by rootq->enqueue() and then the original packet is also dropped. - If rootq->enqueue() sends the duplicated packet to a different qdisc and the original packet is dropped. In both cases NET_XMIT_SUCCESS is returned even though no packets are enqueued at the netem qdisc. The fix is to defer the enqueue of the duplicate packet until after the original packet has been guaranteed to return NET_XMIT_SUCCESS.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
14.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥5.0  –  <5.4.283
linuxlinux_kernel*≥5.5  –  <5.10.225
linuxlinux_kernel*≥5.11  –  <5.15.166
linuxlinux_kernel*≥5.16  –  <6.1.107
linuxlinux_kernel*≥6.2  –  <6.6.48
linuxlinux_kernel*≥6.7  –  <6.10.7
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any

References 10

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-265688.html
  • git.kernel.org https://git.kernel.org/stable/c/0486d31dd8198e22b63a4730244b38fffce6d469
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/52d99a69f3d556c6426048c9d481b912205919d8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/577d6c0619467fe90f7e8e57e45cb5bd9d936014
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/759e3e8c4a6a6b4e52ebc4547123a457f0ce90d4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c07ff8592d57ed258afee5a5e04991a48dbaf382
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c414000da1c2ea1ba9a5e5bb1a4ba774e51e202d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e5bb2988a310667abed66c7d3ffa28880cf0f883
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0486d31dd8198e22b63a4730244b38fffce6d469
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/52d99a69f3d556c6426048c9d481b912205919d8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/577d6c0619467fe90f7e8e57e45cb5bd9d936014
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/759e3e8c4a6a6b4e52ebc4547123a457f0ce90d4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c07ff8592d57ed258afee5a5e04991a48dbaf382
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c414000da1c2ea1ba9a5e5bb1a4ba774e51e202d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e5bb2988a310667abed66c7d3ffa28880cf0f883
    Patch