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🛡️ CVE-2024-42110 — kernel

🟠 CVSS 7.5 — High ✅ No Known Exploit NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

net: ntb_netdev: Move ntb_netdev_rx_handler() to call netif_rx() from __netif_rx()

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

net: ntb_netdev: Move ntb_netdev_rx_handler() to call netif_rx() from __netif_rx()

The following is emitted when using idxd (DSA) dmanegine as the data

mover for ntb_transport that ntb_netdev uses.

[74412.546922] BUG: using smp_processor_id() in preemptible [00000000] code: irq/52-idxd-por/14526

[74412.556784] caller is netif_rx_internal+0x42/0x130

[74412.562282] CPU: 6 PID: 14526 Comm: irq/52-idxd-por Not tainted 6.9.5 #5

[74412.569870] Hardware name: Intel Corporation ArcherCity/ArcherCity, BIOS EGSDCRB1.E9I.1752.P05.2402080856 02/08/2024

[74412.581699] Call Trace:

[74412.584514] <TASK>

[74412.586933] dump_stack_lvl+0x55/0x70

[74412.591129] check_preemption_disabled+0xc8/0xf0

[74412.596374] netif_rx_internal+0x42/0x130

[74412.600957] __netif_rx+0x20/0xd0

[74412.604743] ntb_netdev_rx_handler+0x66/0x150 [ntb_netdev]

[74412.610985] ntb_complete_rxc+0xed/0x140 [ntb_transport]

[74412.617010] ntb_rx_copy_callback+0x53/0x80 [ntb_transport]

[74412.623332] idxd_dma_complete_txd+0xe3/0x160 [idxd]

[74412.628963] idxd_wq_thread+0x1a6/0x2b0 [idxd]

[74412.634046] irq_thread_fn+0x21/0x60

[74412.638134] ? irq_thread+0xa8/0x290

[74412.642218] irq_thread+0x1a0/0x290

[74412.646212] ? __pfx_irq_thread_fn+0x10/0x10

[74412.651071] ? __pfx_irq_thread_dtor+0x10/0x10

[74412.656117] ? __pfx_irq_thread+0x10/0x10

[74412.660686] kthread+0x100/0x130

[74412.664384] ? __pfx_kthread+0x10/0x10

[74412.668639] ret_from_fork+0x31/0x50

[74412.672716] ? __pfx_kthread+0x10/0x10

[74412.676978] ret_from_fork_asm+0x1a/0x30

[74412.681457] </TASK>

The cause is due to the idxd driver interrupt completion handler uses

threaded interrupt and the threaded handler is not hard or soft interrupt

context. However __netif_rx() can only be called from interrupt context.

Change the call to netif_rx() in order to allow completion via normal

context for dmaengine drivers that utilize threaded irq handling.

While the following commit changed from netif_rx() to __netif_rx(),

baebdf48c360 ("net: dev: Makes sure netif_rx() can be invoked in any context."),

the change should've been a noop instead. However, the code precedes this

fix should've been using netif_rx_ni() or netif_rx_any_context().

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

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

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2024-42110 is recorded against 2 packages.

  • kernel (from 6.7.0 up to 6.9.9)
  • linux-kernel

Timeline and source

Published on 30 July 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)
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:

Details

Severity High
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-07-30
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.7.0 6.9.9
linux-kernel — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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