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