Use After Free Affecting kernel-64kb-devel package, versions <6.4.0-150600.23.14.1
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Test your applications- Snyk ID SNYK-SLES156-KERNEL64KBDEVEL-7553224
- published 23 Jul 2024
- disclosed 22 Jul 2024
Introduced: 22 Jul 2024
CVE-2024-38385 Open this link in a new tabHow to fix?
Upgrade SLES:15.6 kernel-64kb-devel to version 6.4.0-150600.23.14.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-64kb-devel package and not the kernel-64kb-devel package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
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.
References
- https://www.suse.com/security/cve/CVE-2024-38385.html
- https://bugzilla.suse.com/1227085
- https://git.kernel.org/stable/c/1c7891812d85500ae2ca4051fa5683fcf29930d8
- https://git.kernel.org/stable/c/b84a8aba806261d2f759ccedf4a2a6a80a5e55ba
- https://git.kernel.org/stable/c/d084aa022f84319f8079e30882cbcbc026af9f21