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CVE-2026-45852— RDMA/rxe: Fix double free in rxe_srq_from_init

CVSS 7.8 · High EPSS 0.01% · P2

Possible ATT&CK Techniques 1AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 20

VendorProductVersion RangeStatus
LinuxLinuxaae0484e15f062ad2c2502e68e15dfb8b8f84608< 22b8c23a3b92d023614bb00896fe364b2c1a31d3affected
aae0484e15f062ad2c2502e68e15dfb8b8f84608< af5956243018918130d52c9f671efdb40bab3366affected
aae0484e15f062ad2c2502e68e15dfb8b8f84608< d286f0d4e3ad3caf5f0e673cdad7bf89bf37d947affected
aae0484e15f062ad2c2502e68e15dfb8b8f84608< 26793db60925df1e88a29466813d586cbc190b8caffected
aae0484e15f062ad2c2502e68e15dfb8b8f84608< ce6f8e007682f378279d4cf83b240f12d52c723baffected
aae0484e15f062ad2c2502e68e15dfb8b8f84608< 5c07aef09a121a4cd622a71eb0753a9e135c84a8affected
aae0484e15f062ad2c2502e68e15dfb8b8f84608< 26a9cfe12f4ffdeaa136f252478986fa5f397ddcaffected
aae0484e15f062ad2c2502e68e15dfb8b8f84608< 0beefd0e15d962f497aad750b2d5e9c3570b66d1affected
… +12 more rows
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I. Basic Information for CVE-2026-45852

Vulnerability Information
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Vulnerability Title
RDMA/rxe: Fix double free in rxe_srq_from_init
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix double free in rxe_srq_from_init In rxe_srq_from_init(), the queue pointer 'q' is assigned to 'srq->rq.queue' before copying the SRQ number to user space. If copy_to_user() fails, the function calls rxe_queue_cleanup() to free the queue, but leaves the now-invalid pointer in 'srq->rq.queue'. The caller of rxe_srq_from_init() (rxe_create_srq) eventually calls rxe_srq_cleanup() upon receiving the error, which triggers a second rxe_queue_cleanup() on the same memory, leading to a double free. The call trace looks like this: kmem_cache_free+0x.../0x... rxe_queue_cleanup+0x1a/0x30 [rdma_rxe] rxe_srq_cleanup+0x42/0x60 [rdma_rxe] rxe_elem_release+0x31/0x70 [rdma_rxe] rxe_create_srq+0x12b/0x1a0 [rdma_rxe] ib_create_srq_user+0x9a/0x150 [ib_core] Fix this by moving 'srq->rq.queue = q' after copy_to_user.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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RDMA rxe模块在rxe_srq_from_init()函数中未正确处理copy_to_user()失败后的队列指针，可能导致双重释放。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux aae0484e15f062ad2c2502e68e15dfb8b8f84608 ~ 22b8c23a3b92d023614bb00896fe364b2c1a31d3 -
LinuxLinux 4.20 -

II. Public POCs for CVE-2026-45852

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III. Intelligence Information for CVE-2026-45852

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Patches & Fixes for CVE-2026-45852 (8)

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-2026-459458.8 HIGHiommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-460568.8 HIGHBluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-458438.2 HIGHslip: bound decode() reads against the compressed packet length
CVE-2026-460378.2 HIGHipv4: icmp: validate reply type before using icmp_pointers
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-2026-461007.8 HIGHfs: afs: revert mmap_prepare() change
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-2026-458787.8 HIGHdrm/amdkfd: Fix watch_id bounds checking in debug address watch v2
CVE-2026-460367.8 HIGHvfio/cdx: Serialize VFIO_DEVICE_SET_IRQS with a per-device mutex
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

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