In the Linux kernel, the following vulnerability has been resolved:
watchdog: Fix possible use-after-free in wdt_startup()
This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free.
Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
CVSS Details
- CVSS 3.1 Base Score: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 30, 2024 | May 21, 2024 |
| Suse | — | Upgrade kernel-preemptUpgrade kernel-defaultUpgrade kernel-xenUpgrade kernel-preempt-develUpgrade kernel-default-baseUpgrade kernel-azure-develUpgrade kernel-azureUpgrade kernel-ec2Upgrade kernel-source-azureUpgrade kernel-default-manUpgrade kernel-trace-develUpgrade kernel-obs-buildUpgrade kernel-azure-baseUpgrade kernel-ec2-baseUpgrade reiserfs-kmp-defaultUpgrade kernel-sourceUpgrade kernel-docsUpgrade kernel-default-extraUpgrade kernel-default-develUpgrade kernel-symsUpgrade kernel-ec2-develUpgrade kernel-xen-baseUpgrade kernel-syms-azureUpgrade kernel-zfcpdumpUpgrade kernel-develUpgrade kernel-traceUpgrade kernel-xen-develUpgrade kernel-64kb-develUpgrade kernel-macrosUpgrade kernel-devel-azureUpgrade kernel-trace-baseUpgrade kernel-64kb | Aug 9, 2024 | May 21, 2024 |
| Ubuntu | — | Upgrade linux-aws-5.4Upgrade linux-azureUpgrade linux-raspiUpgrade linux-oracle-5.4Upgrade linux-awsUpgrade linux-raspi-5.4Upgrade linux-bluefieldUpgrade linuxUpgrade linux-azure-4.15Upgrade linux-kvmUpgrade linux-azure-5.4Upgrade linux-gcp-fipsUpgrade linux-hweUpgrade linux-gcpUpgrade linux-azure-fde-5.15Upgrade linux-fipsUpgrade linux-gcp-5.4Upgrade linux-gkeopUpgrade linux-ibmUpgrade linux-gcp-4.15Upgrade linux-aws-fipsUpgrade linux-hwe-5.4Upgrade linux-azure-fipsUpgrade linux-aws-hweUpgrade linux-oracle | Nov 19, 2024 | May 21, 2024 |
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