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