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-ec2-baseUpgrade kernel-develUpgrade kernel-syms-azureUpgrade kernel-default-extraUpgrade kernel-ec2-develUpgrade kernel-xen-baseUpgrade kernel-default-develUpgrade kernel-docsUpgrade kernel-sourceUpgrade kernel-symsUpgrade kernel-trace-baseUpgrade kernel-64kbUpgrade kernel-xen-develUpgrade kernel-macrosUpgrade kernel-devel-azureUpgrade kernel-zfcpdumpUpgrade kernel-traceUpgrade reiserfs-kmp-defaultUpgrade kernel-64kb-develUpgrade kernel-xenUpgrade kernel-source-azureUpgrade kernel-azure-develUpgrade kernel-azure-baseUpgrade kernel-azureUpgrade kernel-default-baseUpgrade kernel-default-manUpgrade kernel-preempt-develUpgrade kernel-preemptUpgrade kernel-ec2Upgrade kernel-trace-develUpgrade kernel-obs-buildUpgrade kernel-default | Aug 9, 2024 | May 21, 2024 |
| Ubuntu | — | Upgrade linux-gcp-4.15Upgrade linux-gcp-5.4Upgrade linux-ibmUpgrade linux-gcpUpgrade linux-aws-hweUpgrade linux-oracleUpgrade linuxUpgrade linux-gcp-fipsUpgrade linux-azure-fde-5.15Upgrade linux-azure-5.4Upgrade linux-hweUpgrade linux-azure-fipsUpgrade linux-hwe-5.4Upgrade linux-gkeopUpgrade linux-azure-4.15Upgrade linux-aws-fipsUpgrade linux-fipsUpgrade linux-kvmUpgrade linux-raspiUpgrade linux-aws-5.4Upgrade linux-oracle-5.4Upgrade linux-azureUpgrade linux-bluefieldUpgrade linux-awsUpgrade linux-raspi-5.4 | Nov 19, 2024 | May 21, 2024 |
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