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🛡️ CVE-2024-47734 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

bonding: Fix unnecessary warnings and logs from bond_xdp_get_xmit_slave()

In the Linux kernel, the following vulnerability has been resolved:

bonding: Fix unnecessary warnings and logs from bond_xdp_get_xmit_slave()

syzbot reported a WARNING in bond_xdp_get_xmit_slave. To reproduce

this[1], one bond device (bond1) has xdpdrv, which increases

bpf_master_redirect_enabled_key. Another bond device (bond0) which is

unsupported by XDP but its slave (veth3) has xdpgeneric that returns

XDP_TX. This triggers WARN_ON_ONCE() from the xdp_master_redirect().

To reduce unnecessary warnings and improve log management, we need to

delete the WARN_ON_ONCE() and add ratelimit to the netdev_err().

[1] Steps to reproduce:

# Needs tx_xdp with return XDP_TX;

ip l add veth0 type veth peer veth1

ip l add veth3 type veth peer veth4

ip l add bond0 type bond mode 6 # BOND_MODE_ALB, unsupported by XDP

ip l add bond1 type bond # BOND_MODE_ROUNDROBIN by default

ip l set veth0 master bond1

ip l set bond1 up

# Increases bpf_master_redirect_enabled_key

ip l set dev bond1 xdpdrv object tx_xdp.o section xdp_tx

ip l set veth3 master bond0

ip l set bond0 up

ip l set veth4 up

# Triggers WARN_ON_ONCE() from the xdp_master_redirect()

ip l set veth3 xdpgeneric object tx_xdp.o section xdp_tx

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: None.
  • Availability impact: None.

Affected software

CVE-2024-47734 is recorded against 2 packages.

  • kernel (from 6.11.0 up to 6.11.2)
  • linux-kernel (from 6.11 up to 6.11.2)

Timeline and source

Published on 21 October 2024 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
lists.debian.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2024-47734 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-10-21
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.11.0 6.11.2
linux-kernel 6.11 6.11.2

Similar Threats

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