CVE-2024-40983

MEDIUM
Published Jul 12, 2024 Modified Nov 3, 2025

Description

In the Linux kernel, the following vulnerability has been resolved: tipc: force a dst refcount before doing decryption As it says in commit 3bc07321ccc2 ("xfrm: Force a dst refcount before entering the xfrm type handlers"): "Crypto requests might return asynchronous. In this case we leave the rcu protected region, so force a refcount on the skb's destination entry before we enter the xfrm type input/output handlers." On TIPC decryption path it has the same problem, and skb_dst_force() should be called before doing decryption to avoid a possible crash. Shuang reported this issue when this warning is triggered: [] WARNING: include/net/dst.h:337 tipc_sk_rcv+0x1055/0x1ea0 [tipc] [] Kdump: loaded Tainted: G W --------- - - 4.18.0-496.el8.x86_64+debug [] Workqueue: crypto cryptd_queue_worker [] RIP: 0010:tipc_sk_rcv+0x1055/0x1ea0 [tipc] [] Call Trace: [] tipc_sk_mcast_rcv+0x548/0xea0 [tipc] [] tipc_rcv+0xcf5/0x1060 [tipc] [] tipc_aead_decrypt_done+0x215/0x2e0 [tipc] [] cryptd_aead_crypt+0xdb/0x190 [] cryptd_queue_worker+0xed/0x190 [] process_one_work+0x93d/0x17e0

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CVSS v3.1 Score

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

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/2ebe8f840c7450ecbfca9d18ac92e9ce9155e269 https://git.kernel.org/stable/c/3eb1b39627892c4e26cb0162b75725aa5fcc60c8 https://git.kernel.org/stable/c/623c90d86a61e3780f682b32928af469c66ec4c2 https://git.kernel.org/stable/c/6808b41371670c51feea14f63ade211e78100930 https://git.kernel.org/stable/c/692803b39a36e63ac73208e0a3769ae6a2f9bc76 https://git.kernel.org/stable/c/b57a4a2dc8746cea58a922ebe31b6aa629d69d93 https://git.kernel.org/stable/c/2ebe8f840c7450ecbfca9d18ac92e9ce9155e269 https://git.kernel.org/stable/c/3eb1b39627892c4e26cb0162b75725aa5fcc60c8 https://git.kernel.org/stable/c/623c90d86a61e3780f682b32928af469c66ec4c2 https://git.kernel.org/stable/c/6808b41371670c51feea14f63ade211e78100930 https://git.kernel.org/stable/c/692803b39a36e63ac73208e0a3769ae6a2f9bc76 https://git.kernel.org/stable/c/b57a4a2dc8746cea58a922ebe31b6aa629d69d93

Frequently Asked Questions

What is CVE-2024-40983? +
In the Linux kernel, the following vulnerability has been resolved: tipc: force a dst refcount before doing decryption As it says in commit 3bc07321ccc2 ("xfrm: Force a dst refcount before entering the xfrm type handlers"): "Crypto requests might return asynchronous. In this case we leave the rcu protected region, so force a refcount on the skb's destination entry before we enter the xfrm type input/output handlers." On TIPC decryption path it has the same problem, and skb_dst_force() should be called before doing decryption to avoid a possible crash. Shuang reported this issue when this warning is triggered: [] WARNING: include/net/dst.h:337 tipc_sk_rcv+0x1055/0x1ea0 [tipc] [] Kdump: loaded Tainted: G W --------- - - 4.18.0-496.el8.x86_64+debug [] Workqueue: crypto cryptd_queue_worker [] RIP: 0010:tipc_sk_rcv+0x1055/0x1ea0 [tipc] [] Call Trace: [] tipc_sk_mcast_rcv+0x548/0xea0 [tipc] [] tipc_rcv+0xcf5/0x1060 [tipc] [] tipc_aead_decrypt_done+0x215/0x2e0 [tipc] [] cryptd_aead_crypt+0xdb/0x190 [] cryptd_queue_worker+0xed/0x190 [] process_one_work+0x93d/0x17e0 It has a CVSS v3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2024-40983? +
CVE-2024-40983 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2024-40983? +
CVE-2024-40983 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-40983? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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