CVE-2024-40983
Linux Kernel vulnerability
- Published12 Jul 2024
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
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
Remediation
- 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
References
- 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://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Frequently asked
Is CVE-2024-40983 being actively exploited?
CVE-2024-40983 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.88%.
How severe is CVE-2024-40983?
CVE-2024-40983 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.88% probability of exploitation.
Which products are affected by CVE-2024-40983?
Affected products include Linux Kernel.
How do I fix CVE-2024-40983?
Upgrade affected software to a fixed version, for example Linux Kernel 5.15.162 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2024-40983 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.