What’s Vulnerable › Vulnerabilities

CVE-2024-41036: net: ks8851: Fix deadlock with the SPI chip variant

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-29 · updated 2026-08-04
• Weakness: CWE-667

Description

In the Linux kernel, the following vulnerability has been resolved: net: ks8851: Fix deadlock with the SPI chip variant When SMP is enabled and spinlocks are actually functional then there is a deadlock with the 'statelock' spinlock between ks8851_start_xmit_spi and ks8851_irq: watchdog: BUG: soft lockup - CPU#0 stuck for 27s! call trace: queued_spin_lock_slowpath+0x100/0x284 do_raw_spin_lock+0x34/0x44 ks8851_start_xmit_spi+0x30/0xb8 ks8851_start_xmit+0x14/0x20 netdev_start_xmit+0x40/0x6c dev_hard_start_xmit+0x6c/0xbc sch_direct_xmit+0xa4/0x22c __qdisc_run+0x138/0x3fc qdisc_run+0x24/0x3c net_tx_action+0xf8/0x130 handle_softirqs+0x1ac/0x1f0 __do_softirq+0x14/0x20 ____do_softirq+0x10/0x1c call_on_irq_stack+0x3c/0x58 do_softirq_own_stack+0x1c/0x28 __irq_exit_rcu+0x54/0x9c irq_exit_rcu+0x10/0x1c el1_interrupt+0x38/0x50 el1h_64_irq_handler+0x18/0x24 el1h_64_irq+0x64/0x68 __netif_schedule+0x6c/0x80 netif_tx_wake_queue+0x38/0x48 ks8851_irq+0xb8/0x2c8 irq_thread_fn+0x2c/0x74 irq_thread+0x10c/0x1b0 kthread+0xc8/0xd8 ret_from_fork+0x10/0x20 This issue has not been identified earlier because tests were done on a device with SMP disabled and so spinlocks were actually NOPs. Now use spin_(un)lock_bh for TX queue related locking to avoid execution of softirq work synchronously that would lead to a deadlock.

Affected products

• Linux kernel: from 6.1.70 before 6.1.100; from 6.6.9 before 6.6.41; from 6.7 before 6.9.10; 6.10-rc1, 6.10-rc2, 6.10-rc3, 6.10-rc4, 6.10-rc5, 6.10-rc6 (+1) — fixed in 6.1.100, 6.6.41, 6.9.10

How to fix

Upgrade to a fixed version: Linux kernel 6.1.100, 6.6.41, 6.9.10. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0913ec336a6c0c4a2b296bd9f74f8e41c4c83c8c
• https://git.kernel.org/stable/c/10fec0cd0e8f56ff06c46bb24254c7d8f8f2bbf0
• https://git.kernel.org/stable/c/80ece00137300d74642f2038c8fe5440deaf9f05
• https://git.kernel.org/stable/c/a0c69c492f4a8fad52f0a97565241c926160c9a4
• https://git.kernel.org/stable/c/0913ec336a6c0c4a2b296bd9f74f8e41c4c83c8c
• https://git.kernel.org/stable/c/10fec0cd0e8f56ff06c46bb24254c7d8f8f2bbf0
• https://git.kernel.org/stable/c/80ece00137300d74642f2038c8fe5440deaf9f05
• https://git.kernel.org/stable/c/a0c69c492f4a8fad52f0a97565241c926160c9a4
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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