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In the Linux kernel, the following vulnerability has been resolved:
cifs: Fix memory leak on the deferred close
xfstests on smb21 report kmemleak as below:
unreferenced object 0xffff8881767d6200 (size 64): comm "xfs_io", pid 1284, jiffies 4294777434 (age 20.789s) hex dump (first 32 bytes): 80 5a d0 11 81 88 ff ff 78 8a aa 63 81 88 ff ff .Z......x..c.... 00 71 99 76 81 88 ff ff 00 00 00 00 00 00 00 00 .q.v............ backtrace: [<00000000ad04e6ea>] cifs_close+0x92/0x2c0 [<0000000028b93c82>] __fput+0xff/0x3f0 [<00000000d8116851>] task_work_run+0x85/0xc0 [<0000000027e14f9e>] do_exit+0x5e5/0x1240 [<00000000fb492b95>] do_group_exit+0x58/0xe0 [<00000000129a32d9>] __x64_sys_exit_group+0x28/0x30 [<00000000e3f7d8e9>] do_syscall_64+0x35/0x80 [<00000000102e8a0b>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
When cancel the deferred close work, we should also cleanup the struct cifs_deferred_close.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernelUpgrade kernel-headersUpgrade python-perfUpgrade kernel-livepatch-5.15.69-37.134Upgrade bpftool-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade perfUpgrade bpftoolUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-develUpgrade perf-debuginfoUpgrade kernel-tools | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Jun 20, 2025 | Jun 20, 2025 |
| Dell Powerstore Dsa2025429 | — | Upgrade Dell PowerStoreOS to the latest version | Dec 3, 2025 | Dec 2, 2025 |
| Dell Powerstore Dsa2026039 | — | Upgrade Dell PowerStoreOS to the latest version | Jan 13, 2026 | Jan 6, 2026 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jun 18, 2025 |
| Ubuntu | — | Upgrade linuxUpgrade linux-raspiUpgrade linux-lowlatency-hwe-5.15Upgrade linux-azure-fdeUpgrade linux-awsUpgrade linux-gkeopUpgrade linux-hwe-5.15Upgrade linux-ibmUpgrade linux-azureUpgrade linux-lowlatencyUpgrade linux-intel-iotg-5.15Upgrade linux-gcp-5.15Upgrade linux-aws-5.15Upgrade linux-realtimeUpgrade linux-gkeUpgrade linux-kvmUpgrade linux-oracleUpgrade linux-intel-iotgUpgrade linux-nvidiaUpgrade linux-gcpUpgrade linux-azure-5.15Upgrade linux-oracle-5.15Upgrade linux-riscv-5.15 | Jun 26, 2025 | Jun 18, 2025 |
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