CVE-2024-38385

MediumCVSS 5.5/10Last modified Aug 4, 2026

Description

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

genirq/irqdesc: Prevent use-after-free in irq_find_at_or_after()

irq_find_at_or_after() dereferences the interrupt descriptor which is returned by mt_find() while neither holding sparse_irq_lock nor RCU read lock, which means the descriptor can be freed between mt_find() and the dereference:

CPU0 CPU1 desc = mt_find() delayed_free_desc(desc) irq_desc_get_irq(desc)

The use-after-free is reported by KASAN:

Call trace: irq_get_next_irq+0x58/0x84 show_stat+0x638/0x824 seq_read_iter+0x158/0x4ec proc_reg_read_iter+0x94/0x12c vfs_read+0x1e0/0x2c8

Freed by task 4471: slab_free_freelist_hook+0x174/0x1e0 __kmem_cache_free+0xa4/0x1dc kfree+0x64/0x128 irq_kobj_release+0x28/0x3c kobject_put+0xcc/0x1e0 delayed_free_desc+0x14/0x2c rcu_do_batch+0x214/0x720

Guard the access with a RCU read lock section.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-416

Affected software

Vendor	Product	Versions
Linux	Linux	>= 721255b9826bd11c7a38b585905fc2dd0fb94e52, < 1c7891812d85500ae2ca4051fa5683fcf29930d8; >= 721255b9826bd11c7a38b585905fc2dd0fb94e52, < d084aa022f84319f8079e30882cbcbc026af9f21; >= 721255b9826bd11c7a38b585905fc2dd0fb94e52, < b84a8aba806261d2f759ccedf4a2a6a80a5e55ba
Linux	Linux	6.5

References

Timeline

Published: Jun 25, 2024
Last modified: Aug 4, 2026
NVD status: Modified

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