In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix reference count leak in smb_check_perm_dacl()
The issue happens in a specific path in smb_check_perm_dacl(). When "id" and "uid" have the same value, the function simply jumps out of the loop without decrementing the reference count of the object "posix_acls", which is increased by get_acl() earlier. This may result in memory leaks.
Fix it by decreasing the reference count of "posix_acls" before jumping to label "check_access_bits".
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Ubuntu | — | Upgrade linux-gcpUpgrade linux-lowlatencyUpgrade linux-azure-fdeUpgrade linux-azure-5.15Upgrade linux-gkeUpgrade linux-ibmUpgrade linux-realtimeUpgrade linux-riscv-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-gkeopUpgrade linux-intel-iotgUpgrade linux-nvidiaUpgrade linux-oracle-5.15Upgrade linux-oracleUpgrade linux-aws-5.15Upgrade linux-kvmUpgrade linux-gcp-5.15Upgrade linux-awsUpgrade linuxUpgrade linux-lowlatency-hwe-5.15Upgrade linux-azureUpgrade linux-hwe-5.15Upgrade linux-raspi | Mar 19, 2025 | Feb 26, 2025 |
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