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CVE-2026-45880— PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails

AI Predicted 5.5 Difficulty: Moderate EPSS 0.02% · P7

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinux7e9c7ef83d785236f5a8c3761dd053fae9b92fb8< baa42b756d183a59572f3890981a3d32b8d05d40affected
7e9c7ef83d785236f5a8c3761dd053fae9b92fb8< 51b7181cfbedf289ce794b6d97a1c596c309ec38affected
7e9c7ef83d785236f5a8c3761dd053fae9b92fb8< e19cce88ec4c4877f4ff2469099b9cf23cc3e93eaffected
7e9c7ef83d785236f5a8c3761dd053fae9b92fb8< a1f4dc72efc3204db95d052058d785cad7ce755faffected
7e9c7ef83d785236f5a8c3761dd053fae9b92fb8< 6220694c52a5a04102b48109e4f24e958b559bd3affected
6.2affected
< 6.2unaffected
6.6.128≤ 6.6.*unaffected
… +4 more rows
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I. Basic Information for CVE-2026-45880

Vulnerability Information
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Vulnerability Title
PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails When vm_insert_page() fails in p2pmem_alloc_mmap(), p2pmem_alloc_mmap() doesn't invoke percpu_ref_put() to free the per-CPU ref of pgmap acquired after gen_pool_alloc_owner(), and memunmap_pages() will hang forever when trying to remove the PCI device. Fix it by adding the missed percpu_ref_put().
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PCI P2PDMA驱动中p2pmem_alloc_mmap()在vm_insert_page()失败时未释放per-CPU pgmap引用，可能导致设备移除时挂起。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 ~ baa42b756d183a59572f3890981a3d32b8d05d40 -
LinuxLinux 6.2 -

II. Public POCs for CVE-2026-45880

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III. Intelligence Information for CVE-2026-45880

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Patches & Fixes for CVE-2026-45880 (5)

Same Patch Batch · Linux · 2026-05-27 · 276 CVEs total

CVE-2026-460399.8 CRITICALrxgk: Fix potential integer overflow in length check
CVE-2026-458989.8 CRITICALRDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-459889.8 CRITICALrxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-459729.8 CRITICALsmb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-460439.1 CRITICALRDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-460568.8 HIGHBluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-459458.8 HIGHiommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-460378.2 HIGHipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-458438.2 HIGHslip: bound decode() reads against the compressed packet length
CVE-2026-460108.1 HIGHrxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-460998.1 HIGHnet: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-460767.9 HIGHKVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-458787.8 HIGHdrm/amdkfd: Fix watch_id bounds checking in debug address watch v2
CVE-2026-459597.8 HIGHcrypto: ccp - Fix a crash due to incorrect cleanup usage of kfree
CVE-2026-460117.8 HIGHmedia: mtk-jpeg: fix use-after-free in release path due to uncancelled work
CVE-2026-458947.8 HIGHiommu/vt-d: Clear Present bit before tearing down PASID entry
CVE-2026-460157.8 HIGHtcp: call sk_data_ready() after listener migration
CVE-2026-458527.8 HIGHRDMA/rxe: Fix double free in rxe_srq_from_init
CVE-2026-458627.8 HIGHiommu/vt-d: Flush cache for PASID table before using it
CVE-2026-458617.8 HIGHgfs2: Fix slab-use-after-free in qd_put

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-45880

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