In the Linux kernel, the following vulnerability has been resolved:
iommufd: Fix out_fput in iommufd_fault_alloc()
As fput() calls the file->f_op->release op, where fault obj and ictx are getting released, there is no need to release these two after fput() one more time, which would result in imbalanced refcounts: refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 48 PID: 2369 at lib/refcount.c:31 refcount_warn_saturate+0x60/0x230 Call trace: refcount_warn_saturate+0x60/0x230 (P) refcount_warn_saturate+0x60/0x230 (L) iommufd_fault_fops_release+0x9c/0xe0 [iommufd] ... VFS: Close: file count is 0 (f_op=iommufd_fops [iommufd]) WARNING: CPU: 48 PID: 2369 at fs/open.c:1507 filp_flush+0x3c/0xf0 Call trace: filp_flush+0x3c/0xf0 (P) filp_flush+0x3c/0xf0 (L) __arm64_sys_close+0x34/0x98 ... imbalanced put on file reference count WARNING: CPU: 48 PID: 2369 at fs/file.c:74 __file_ref_put+0x100/0x138 Call trace: __file_ref_put+0x100/0x138 (P) __file_ref_put+0x100/0x138 (L) __fput_sync+0x4c/0xd0
Drop those two lines to fix the warnings above.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/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 27, 2026 | Jul 27, 2026 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Dec 27, 2024 |
| Ubuntu | — | Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.11.0-1011-awsUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-realtimeUpgrade linux-image-oem-24.04Upgrade linux-image-gcpUpgrade linux-image-6.11.0-1012-azure-fdeUpgrade linux-image-6.11.0-1011-gcp-64kUpgrade linux-image-6.11.0-1017-oemUpgrade linux-image-oem-24.04bUpgrade linux-image-6.11.0-1010-raspiUpgrade linux-image-virtualUpgrade linux-image-6.11.0-1011-lowlatency-64kUpgrade linux-image-6.11.0-21-genericUpgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-awsUpgrade linux-image-oracleUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-raspiUpgrade linux-image-gcp-64kUpgrade linux-image-6.11.0-1013-oracleUpgrade linux-image-generic-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.11.0-1007-realtimeUpgrade linux-image-6.11.0-1012-azureUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-azure-fdeUpgrade linux-image-genericUpgrade linux-image-azureUpgrade linux-image-6.11.0-1011-lowlatencyUpgrade linux-image-lowlatencyUpgrade linux-image-oracle-64kUpgrade linux-image-6.11.0-1013-oracle-64kUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oem-24.04aUpgrade linux-image-6.11.0-21-generic-64kUpgrade linux-image-6.11.0-1011-gcp | Mar 28, 2025 | Dec 27, 2024 |
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