CVE-2024-35814— swiotlb: Fix double-allocation of slots due to broken alignment handling
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2024-35814
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
swiotlb: Fix double-allocation of slots due to broken alignment handling
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: swiotlb: Fix double-allocation of slots due to broken alignment handling Commit bbb73a103fbb ("swiotlb: fix a braino in the alignment check fix"), which was a fix for commit 0eee5ae10256 ("swiotlb: fix slot alignment checks"), causes a functional regression with vsock in a virtual machine using bouncing via a restricted DMA SWIOTLB pool. When virtio allocates the virtqueues for the vsock device using dma_alloc_coherent(), the SWIOTLB search can return page-unaligned allocations if 'area->index' was left unaligned by a previous allocation from the buffer: # Final address in brackets is the SWIOTLB address returned to the caller | virtio-pci 0000:00:07.0: orig_addr 0x0 alloc_size 0x2000, iotlb_align_mask 0x800 stride 0x2: got slot 1645-1649/7168 (0x98326800) | virtio-pci 0000:00:07.0: orig_addr 0x0 alloc_size 0x2000, iotlb_align_mask 0x800 stride 0x2: got slot 1649-1653/7168 (0x98328800) | virtio-pci 0000:00:07.0: orig_addr 0x0 alloc_size 0x2000, iotlb_align_mask 0x800 stride 0x2: got slot 1653-1657/7168 (0x9832a800) This ends badly (typically buffer corruption and/or a hang) because swiotlb_alloc() is expecting a page-aligned allocation and so blindly returns a pointer to the 'struct page' corresponding to the allocation, therefore double-allocating the first half (2KiB slot) of the 4KiB page. Fix the problem by treating the allocation alignment separately to any additional alignment requirements from the device, using the maximum of the two as the stride to search the buffer slots and taking care to ensure a minimum of page-alignment for buffers larger than a page. This also resolves swiotlb allocation failures occuring due to the inclusion of ~PAGE_MASK in 'iotlb_align_mask' for large allocations and resulting in alignment requirements exceeding swiotlb_max_mapping_size().
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于 swiotlb 模块存在双重分配问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2024-35814
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2024-35814
请登录查看更多情报信息。
Same Patch Batch · Linux · 2024-05-17 · 135 CVEs total
| CVE-2024-35834 | xsk: recycle buffer in case Rx queue was full | |
| CVE-2023-52686 | powerpc/powernv: Add a null pointer check in opal_event_init() | |
| CVE-2023-52684 | firmware: qcom: qseecom: fix memory leaks in error paths | |
| CVE-2023-52683 | ACPI: LPIT: Avoid u32 multiplication overflow | |
| CVE-2023-52682 | f2fs: fix to wait on block writeback for post_read case | |
| CVE-2023-52681 | efivarfs: Free s_fs_info on unmount | |
| CVE-2023-52680 | ALSA: scarlett2: Add missing error checks to *_ctl_get() | |
| CVE-2023-52679 | of: Fix double free in of_parse_phandle_with_args_map | |
| CVE-2023-52678 | drm/amdkfd: Confirm list is non-empty before utilizing list_first_entry in kfd_topology.c | |
| CVE-2023-52677 | riscv: Check if the code to patch lies in the exit section | |
| CVE-2023-52676 | bpf: Guard stack limits against 32bit overflow | |
| CVE-2023-52675 | powerpc/imc-pmu: Add a null pointer check in update_events_in_group() | |
| CVE-2023-52674 | ALSA: scarlett2: Add clamp() in scarlett2_mixer_ctl_put() | |
| CVE-2024-35838 | wifi: mac80211: fix potential sta-link leak | |
| CVE-2024-35837 | net: mvpp2: clear BM pool before initialization | |
| CVE-2024-35836 | dpll: fix pin dump crash for rebound module | |
| CVE-2024-35835 | net/mlx5e: fix a double-free in arfs_create_groups | |
| CVE-2023-52664 | net: atlantic: eliminate double free in error handling logic | |
| CVE-2024-35830 | media: tc358743: register v4l2 async device only after successful setup | |
| CVE-2024-35831 | io_uring: Fix release of pinned pages when __io_uaddr_map fails |
Showing top 20 of 135 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2024-35814
No comments yet