CVE-2024-40983

Summary

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

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxfc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < 3eb1b39627892c4e26cb0162b75725aa5fcc60c8affected
LinuxLinuxfc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < 692803b39a36e63ac73208e0a3769ae6a2f9bc76affected
LinuxLinuxfc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < 623c90d86a61e3780f682b32928af469c66ec4c2affected
LinuxLinuxfc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < b57a4a2dc8746cea58a922ebe31b6aa629d69d93affected
LinuxLinuxfc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < 6808b41371670c51feea14f63ade211e78100930affected
LinuxLinuxfc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < 2ebe8f840c7450ecbfca9d18ac92e9ce9155e269affected
LinuxLinux5.5affected
LinuxLinux0 < 5.5unaffected
LinuxLinux5.10.221 <= 5.10.*unaffected
LinuxLinux5.15.162 <= 5.15.*unaffected
LinuxLinux6.1.96 <= 6.1.*unaffected
LinuxLinux6.6.36 <= 6.6.*unaffected
LinuxLinux6.9.7 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References