CVE-2024-40983

tipc: force a dst refcount before doing decryption

MEDIUM

5.5

CVSS Score

Published: July 12, 2024 at 12:33 PM UTC

Updated: August 5, 2026 at 12:04 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.9%

SSVC

No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

5.11 ≤ v < 5.15.1625.16 ≤ v < 6.1.965.5 ≤ v < 5.10.2215.5 ≤ v < 5.15.1625.5 ≤ v < 6.1.965.5 ≤ v < 6.105.5 ≤ v < 6.6.365.5 ≤ v < 6.9.76.2 ≤ v < 6.6.366.7 ≤ v < 6.9.76.10 rc1 6.10 rc2 6.10 rc3 6.10 rc4fc1b6d6de2208774efd2a20bf0daddb02d18b1e0

Vendor states this is fixed in 2ebe8f840c7450ecbfca9d18ac92e9ce9155e269 (fixed)

Vendor states this is fixed in 3eb1b39627892c4e26cb0162b75725aa5fcc60c8 (fixed)

Vendor states this is fixed in 623c90d86a61e3780f682b32928af469c66ec4c2 (fixed)

Vendor states this is fixed in 6808b41371670c51feea14f63ade211e78100930 (fixed)

Vendor states this is fixed in 692803b39a36e63ac73208e0a3769ae6a2f9bc76 (fixed)

Vendor states this is fixed in b57a4a2dc8746cea58a922ebe31b6aa629d69d93 (fixed)

Vendor states this is fixed in 5.10.221 (unaffected)

Vendor states this is fixed in 5.15.162 (unaffected)

Vendor states this is fixed in 5.5 (unaffected)

Vendor states this is fixed in 6.1.96 (unaffected)

Vendor states this is fixed in 6.10 (unaffected)

Vendor states this is fixed in 6.6.36 (unaffected)