In the Linux kernel, the following vulnerability has been resolved:
watchdog: sc520_wdt: Fix possible use-after-free in wdt_turnoff()
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-azureUpgrade kernel-azure-develUpgrade kernel-devel-azureUpgrade kernel-sourceUpgrade kernel-traceUpgrade kernel-obs-buildUpgrade kernel-ec2-baseUpgrade kernel-zfcpdumpUpgrade kernel-preempt-develUpgrade kernel-develUpgrade kernel-source-azureUpgrade kernel-64kb-develUpgrade kernel-preemptUpgrade kernel-xen-develUpgrade kernel-syms-azureUpgrade kernel-xen-baseUpgrade kernel-64kbUpgrade kernel-default-extraUpgrade reiserfs-kmp-defaultUpgrade kernel-default-manUpgrade kernel-xenUpgrade kernel-default-develUpgrade kernel-trace-baseUpgrade kernel-defaultUpgrade kernel-ec2-develUpgrade kernel-docsUpgrade kernel-macrosUpgrade kernel-trace-develUpgrade kernel-azure-baseUpgrade kernel-ec2Upgrade kernel-default-baseUpgrade kernel-syms | Aug 9, 2024 | May 21, 2024 |
| Ubuntu | — | Upgrade linux-aws-fipsUpgrade linux-hwe-5.4Upgrade linux-bluefieldUpgrade linux-azure-5.4Upgrade linux-gcp-fipsUpgrade linux-kvmUpgrade linux-azureUpgrade linux-raspiUpgrade linux-hweUpgrade linux-ibmUpgrade linux-aws-5.4Upgrade linux-awsUpgrade linux-azure-fde-5.15Upgrade linux-oracleUpgrade linux-gcp-4.15Upgrade linux-azure-4.15Upgrade linux-raspi-5.4Upgrade linux-gcp-5.4Upgrade linux-fipsUpgrade linux-oracle-5.4Upgrade linux-aws-hweUpgrade linux-azure-fipsUpgrade linux-gcpUpgrade linux-gkeopUpgrade linux | Nov 19, 2024 | May 21, 2024 |
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