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