CVE-2024-56668— iommu/vt-d: Fix qi_batch NULL pointer with nested parent domain
Affected Version Matrix 6
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I. Basic Information for CVE-2024-56668
Vulnerability Information
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Vulnerability Title
iommu/vt-d: Fix qi_batch NULL pointer with nested parent domain
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix qi_batch NULL pointer with nested parent domain The qi_batch is allocated when assigning cache tag for a domain. While for nested parent domain, it is missed. Hence, when trying to map pages to the nested parent, NULL dereference occurred. Also, there is potential memleak since there is no lock around domain->qi_batch allocation. To solve it, add a helper for qi_batch allocation, and call it in both the __cache_tag_assign_domain() and __cache_tag_assign_parent_domain(). BUG: kernel NULL pointer dereference, address: 0000000000000200 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 8104795067 P4D 0 Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 223 UID: 0 PID: 4357 Comm: qemu-system-x86 Not tainted 6.13.0-rc1-00028-g4b50c3c3b998-dirty #2632 Call Trace: ? __die+0x24/0x70 ? page_fault_oops+0x80/0x150 ? do_user_addr_fault+0x63/0x7b0 ? exc_page_fault+0x7c/0x220 ? asm_exc_page_fault+0x26/0x30 ? cache_tag_flush_range_np+0x13c/0x260 intel_iommu_iotlb_sync_map+0x1a/0x30 iommu_map+0x61/0xf0 batch_to_domain+0x188/0x250 iopt_area_fill_domains+0x125/0x320 ? rcu_is_watching+0x11/0x50 iopt_map_pages+0x63/0x100 iopt_map_common.isra.0+0xa7/0x190 iopt_map_user_pages+0x6a/0x80 iommufd_ioas_map+0xcd/0x1d0 iommufd_fops_ioctl+0x118/0x1c0 __x64_sys_ioctl+0x93/0xc0 do_syscall_64+0x71/0x140 entry_SYSCALL_64_after_hwframe+0x76/0x7e
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iommu/vt-d子系统中嵌套父域中qi_batch的空指针问题。
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-2024-56668
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Patch · 2
Same Patch Batch · Linux · 2024-12-27 · 221 CVEs total
| CVE-2024-56606 | af_packet: avoid erroring out after sock_init_data() in packet_create() | |
| CVE-2024-56592 | bpf: Call free_htab_elem() after htab_unlock_bucket() | |
| CVE-2024-56594 | drm/amdgpu: set the right AMDGPU sg segment limitation | |
| CVE-2024-56595 | jfs: add a check to prevent array-index-out-of-bounds in dbAdjTree | |
| CVE-2024-56596 | jfs: fix array-index-out-of-bounds in jfs_readdir | |
| CVE-2024-56597 | jfs: fix shift-out-of-bounds in dbSplit | |
| CVE-2024-56598 | jfs: array-index-out-of-bounds fix in dtReadFirst | |
| CVE-2024-56599 | wifi: ath10k: avoid NULL pointer error during sdio remove | |
| CVE-2024-56601 | net: inet: do not leave a dangling sk pointer in inet_create() | |
| CVE-2024-56600 | net: inet6: do not leave a dangling sk pointer in inet6_create() | |
| CVE-2024-56602 | net: ieee802154: do not leave a dangling sk pointer in ieee802154_create() | |
| CVE-2024-56603 | net: af_can: do not leave a dangling sk pointer in can_create() | |
| CVE-2024-56604 | Bluetooth: RFCOMM: avoid leaving dangling sk pointer in rfcomm_sock_alloc() | |
| CVE-2024-56605 | Bluetooth: L2CAP: do not leave dangling sk pointer on error in l2cap_sock_create() | |
| CVE-2024-56617 | cacheinfo: Allocate memory during CPU hotplug if not done from the primary CPU | |
| CVE-2024-56614 | xsk: fix OOB map writes when deleting elements | |
| CVE-2024-56615 | bpf: fix OOB devmap writes when deleting elements | |
| CVE-2024-56616 | drm/dp_mst: Fix MST sideband message body length check | |
| CVE-2024-56613 | sched/numa: fix memory leak due to the overwritten vma->numab_state | |
| CVE-2024-56618 | pmdomain: imx: gpcv2: Adjust delay after power up handshake |
Showing top 20 of 221 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects - CVE-2026-43499
rtmutex: Use waiter::task instead of current in remove_waite - CVE-2026-43497
fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-aft
Same vendor: Linux
- CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects - CVE-2026-43499
rtmutex: Use waiter::task instead of current in remove_waite - CVE-2026-43497
fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-aft
V. Comments for CVE-2024-56668
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