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CVE-2026-46043— RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv

CVSS 9.1 · Critical EPSS 0.07% · P22

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux8700e3e7c4857d28ebaa824509934556da0b3e76< c4376c672c3648d5bdc31dfffc329d07164f93c4affected
8700e3e7c4857d28ebaa824509934556da0b3e76< 5fedefec757192dcaad29a664ac332c7601be144affected
8700e3e7c4857d28ebaa824509934556da0b3e76< 2c0d71ef12f46c57d37bc571f3f2797db7eb50ccaffected
8700e3e7c4857d28ebaa824509934556da0b3e76< 2fd4f8b749309a61c3f3f88ee8891d94f79e1240affected
8700e3e7c4857d28ebaa824509934556da0b3e76< f83519a4c122c9c7a850a2197648a9ff4c67c520affected
8700e3e7c4857d28ebaa824509934556da0b3e76< 9b924f3a26b21330a837cfe72e819b6393bbeeaaaffected
8700e3e7c4857d28ebaa824509934556da0b3e76< e8ee0e792d475b1067c199ef0af1b6221fa6f43daffected
8700e3e7c4857d28ebaa824509934556da0b3e76< 7244491dab347f648e661da96dc0febadd9daec3affected
… +10 more rows
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I. Basic Information for CVE-2026-46043

Vulnerability Information
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Vulnerability Title
RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv rxe_rcv() currently checks only that the incoming packet is at least header_size(pkt) bytes long before payload_size() is used. However, payload_size() subtracts both the attacker-controlled BTH pad field and RXE_ICRC_SIZE from pkt->paylen: payload_size = pkt->paylen - offset[RXE_PAYLOAD] - bth_pad(pkt) - RXE_ICRC_SIZE This means a short packet can still make payload_size() underflow even if it includes enough bytes for the fixed headers. Simply requiring header_size(pkt) + RXE_ICRC_SIZE is not sufficient either, because a packet with a forged non-zero BTH pad can still leave payload_size() negative and pass an underflowed value to later receive-path users. Fix this by validating pkt->paylen against the full minimum length required by payload_size(): header_size(pkt) + bth_pad(pkt) + RXE_ICRC_SIZE.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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rxe_rcv函数中未充分验证数据包长度，可能导致payload_size函数下溢。
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 8700e3e7c4857d28ebaa824509934556da0b3e76 ~ c4376c672c3648d5bdc31dfffc329d07164f93c4 -
LinuxLinux 4.8 -

II. Public POCs for CVE-2026-46043

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III. Intelligence Information for CVE-2026-46043

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Patches & Fixes for CVE-2026-46043 (8)

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

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-2026-460399.8 CRITICALrxgk: Fix potential integer overflow in length check
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-2026-460378.2 HIGHipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-458438.2 HIGHslip: bound decode() reads against the compressed packet length
CVE-2026-460998.1 HIGHnet: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-460108.1 HIGHrxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-460767.9 HIGHKVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
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-2026-460067.8 HIGHdrm/nouveau: fix u32 overflow in pushbuf reloc bounds check
CVE-2026-458947.8 HIGHiommu/vt-d: Clear Present bit before tearing down PASID entry
CVE-2026-460587.8 HIGHmedia: amphion: Fix race between m2m job_abort and device_run
CVE-2026-460117.8 HIGHmedia: mtk-jpeg: fix use-after-free in release path due to uncancelled work
CVE-2026-460627.8 HIGHntfs3: fix integer overflow in run_unpack() volume boundary check
CVE-2026-460657.8 HIGHfbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
CVE-2026-460367.8 HIGHvfio/cdx: Serialize VFIO_DEVICE_SET_IRQS with a per-device mutex

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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