CVE-2026-23056— uacce: implement mremap in uacce_vm_ops to return -EPERM
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I. Basic Information for CVE-2026-23056
Vulnerability Information
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Vulnerability Title
uacce: implement mremap in uacce_vm_ops to return -EPERM
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: uacce: implement mremap in uacce_vm_ops to return -EPERM The current uacce_vm_ops does not support the mremap operation of vm_operations_struct. Implement .mremap to return -EPERM to remind users. The reason we need to explicitly disable mremap is that when the driver does not implement .mremap, it uses the default mremap method. This could lead to a risk scenario: An application might first mmap address p1, then mremap to p2, followed by munmap(p1), and finally munmap(p2). Since the default mremap copies the original vma's vm_private_data (i.e., q) to the new vma, both munmap operations would trigger vma_close, causing q->qfr to be freed twice(qfr will be set to null here, so repeated release is ok).
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，该漏洞源于未实现mremap操作，可能导致内存重复释放。
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-2026-23056
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Same Patch Batch · Linux · 2026-02-04 · 79 CVEs total
| CVE-2026-23098 | 8.8 HIGH | netrom: fix double-free in nr_route_frame() |
| CVE-2026-23077 | 7.8 HIGH | mm/vma: fix anon_vma UAF on mremap() faulted, unfaulted merge |
| CVE-2026-23074 | 7.8 HIGH | net/sched: Enforce that teql can only be used as root qdisc |
| CVE-2026-23103 | 7.8 HIGH | ipvlan: Make the addrs_lock be per port |
| CVE-2026-23066 | 7.8 HIGH | rxrpc: Fix recvmsg() unconditional requeue |
| CVE-2026-23105 | 7.8 HIGH | net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag |
| CVE-2026-23095 | 7.5 HIGH | gue: Fix skb memleak with inner IP protocol 0. |
| CVE-2026-23067 | iommu/io-pgtable-arm: fix size_t signedness bug in unmap path | |
| CVE-2026-23065 | platform/x86/amd: Fix memory leak in wbrf_record() | |
| CVE-2026-23064 | net/sched: act_ife: avoid possible NULL deref | |
| CVE-2026-23063 | uacce: ensure safe queue release with state management | |
| CVE-2026-23062 | platform/x86: hp-bioscfg: Fix kernel panic in GET_INSTANCE_ID macro | |
| CVE-2026-23058 | can: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak | |
| CVE-2026-23057 | vsock/virtio: Coalesce only linear skb | |
| CVE-2025-71199 | iio: adc: at91-sama5d2_adc: Fix potential use-after-free in sama5d2_adc driver | |
| CVE-2025-71198 | iio: imu: st_lsm6dsx: fix iio_chan_spec for sensors without event detection | |
| CVE-2025-71197 | w1: therm: Fix off-by-one buffer overflow in alarms_store | |
| CVE-2026-23055 | i2c: riic: Move suspend handling to NOIRQ phase | |
| CVE-2026-23053 | NFS: Fix a deadlock involving nfs_release_folio() | |
| CVE-2026-23059 | scsi: qla2xxx: Sanitize payload size to prevent member overflow |
Showing top 20 of 79 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-2026-23056
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