CVE-2024-46800

HIGH EPSS 18.4%
Published Sep 18, 20241y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Sep 18, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: sch/netem: fix use after free in netem_dequeue If netem_dequeue() enqueues packet to inner qdisc and that qdisc returns __NET_XMIT_STOLEN. The packet is dropped but qdisc_tree_reduce_backlog() is not called to update the parent's q.qlen, leading to the similar use-after-free as Commit e04991a48dbaf382 ("netem: fix return value if duplicate enqueue fails") Commands to trigger KASAN UaF: ip link add type dummy ip link set lo up ip link set dummy0 up tc qdisc add dev lo parent root handle 1: drr tc filter add dev lo parent 1: basic classid 1:1 tc class add dev lo classid 1:1 drr tc qdisc add dev lo parent 1:1 handle 2: netem tc qdisc add dev lo parent 2: handle 3: drr tc filter add dev lo parent 3: basic classid 3:1 action mirred egress redirect dev dummy0 tc class add dev lo classid 3:1 drr ping -c1 -W0.01 localhost # Trigger bug tc class del dev lo classid 1:1 tc class add dev lo classid 1:1 drr ping -c1 -W0.01 localhost # UaF

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
18.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥3.3  –  <4.19.322
linuxlinux_kernel*≥4.20  –  <5.4.284
linuxlinux_kernel*≥5.5  –  <5.10.226
linuxlinux_kernel*≥5.11  –  <5.15.167
linuxlinux_kernel*≥5.16  –  <6.1.110
linuxlinux_kernel*≥6.2  –  <6.6.51
linuxlinux_kernel*≥6.7  –  <6.10.10
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any

References 10

  • git.kernel.org https://git.kernel.org/stable/c/14f91ab8d391f249b845916820a56f42cf747241
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/295ad5afd9efc5f67b86c64fce28fb94e26dc4c9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/32008ab989ddcff1a485fa2b4906234c25dc5cd6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3b3a2a9c6349e25a025d2330f479bc33a6ccb54a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/98c75d76187944296068d685dfd8a1e9fd8c4fdc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/db2c235682913a63054e741fe4e19645fdf2d68e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dde33a9d0b80aae0c69594d1f462515d7ff1cb3d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f0bddb4de043399f16d1969dad5ee5b984a64e7b
    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/14f91ab8d391f249b845916820a56f42cf747241
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/295ad5afd9efc5f67b86c64fce28fb94e26dc4c9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/32008ab989ddcff1a485fa2b4906234c25dc5cd6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3b3a2a9c6349e25a025d2330f479bc33a6ccb54a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/98c75d76187944296068d685dfd8a1e9fd8c4fdc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/db2c235682913a63054e741fe4e19645fdf2d68e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dde33a9d0b80aae0c69594d1f462515d7ff1cb3d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f0bddb4de043399f16d1969dad5ee5b984a64e7b
    Patch