What’s Vulnerable › Vulnerabilities

CVE-2026-74427: afs: Fix netns teardown to cancel the preallocation charger

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: afs: Fix netns teardown to cancel the preallocation charger Fix the teardown of an afs network namespace to make sure it cancels the work item that keeps the preallocated rxrpc call/conn/peer queue charged before incoming calls are disabled (i.e. listen 0). Also, if net->live is false because the afs netns is being deleted, make afs_charge_preallocation() skip charging and make afs_rx_new_call() avoid requeuing the charger. (This was found by AI review).

Affected products

• Linux kernel: 4.9 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/47694fbc9d24ab6bf210f91e8efe06a10a478064
• https://git.kernel.org/stable/c/59e8b7652f6cbfb62d377ead0ad553c1b4e39a7a
• https://git.kernel.org/stable/c/63ccaf1bdf8be2330f47f9b5b233dd3fd04acbd9
• https://git.kernel.org/stable/c/85d5fb80fe4f0cc836b6df83f26de204fe102ff7
• https://git.kernel.org/stable/c/a33975ff2b6ea47b8f29956403374b1cdd057539
• https://git.kernel.org/stable/c/b83ecf80e28afb7b6595ba79932e77ca68a5a83d
• https://git.kernel.org/stable/c/eec89c5f8e1adc1de4824042ef75f62aed804153
• https://git.kernel.org/stable/c/f5096e18b6b7fbd1c2a1942e275a51bcfdfb2ad1

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