CVE-2026-46043
published 2026-05-27CVE-2026-46043: 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…
PriorityP351critical9.1CVSS 3.1
AVNACLPRNUINSUCHINAH
EPSS
0.51%
40.8th percentile
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.
Affected
66 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < c4376c672c3648d5bdc31dfffc329d07164f93c4 | c4376c672c3648d5bdc31dfffc329d07164f93c4 |
| linux | linux | >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 5fedefec757192dcaad29a664ac332c7601be144 | 5fedefec757192dcaad29a664ac332c7601be144 |
| linux | linux | >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 2c0d71ef12f46c57d37bc571f3f2797db7eb50cc | 2c0d71ef12f46c57d37bc571f3f2797db7eb50cc |
| linux | linux | >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 2fd4f8b749309a61c3f3f88ee8891d94f79e1240 | 2fd4f8b749309a61c3f3f88ee8891d94f79e1240 |
| linux | linux | >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < f83519a4c122c9c7a850a2197648a9ff4c67c520 | f83519a4c122c9c7a850a2197648a9ff4c67c520 |
| linux | linux | >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 9b924f3a26b21330a837cfe72e819b6393bbeeaa | 9b924f3a26b21330a837cfe72e819b6393bbeeaa |
| linux | linux | >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < e8ee0e792d475b1067c199ef0af1b6221fa6f43d | e8ee0e792d475b1067c199ef0af1b6221fa6f43d |
| linux | linux | >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 7244491dab347f648e661da96dc0febadd9daec3 | 7244491dab347f648e661da96dc0febadd9daec3 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 4.8 < 5.10.258 | 5.10.258 |
| linux | linux_kernel | >= 5.11 < 5.15.209 | 5.15.209 |
| linux | linux_kernel | >= 5.16 < 6.1.175 | 6.1.175 |
| linux | linux_kernel | >= 6.13 < 6.18.27 | 6.18.27 |
| linux | linux_kernel | >= 6.19 < 7.0.4 | 7.0.4 |
| linux | linux_kernel | >= 6.2 < 6.6.140 | 6.6.140 |
| linux | linux_kernel | >= 6.7 < 6.12.86 | 6.12.86 |
| ubuntu | linux | — | — |
| ubuntu | linux-aws | — | — |
| ubuntu | linux-aws-5.15 | — | — |
| ubuntu | linux-aws-6.8 | — | — |
| ubuntu | linux-aws-fips | — | — |
| ubuntu | linux-azure | — | — |
| ubuntu | linux-azure-4.15 | — | — |
| ubuntu | linux-azure-5.15 | — | — |
CVSS provenance
nvdv3.19.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
vendor_ubuntu8.8HIGH
vendor_redhat7.0MEDIUM
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
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- Cryptographic API;
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- ARM64 architecture;
- MIPS architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- ATM drivers;
- RNBD block device driver;
- Ublk userspace block driver;
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- TPM device driver;
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- x86 platform drivers;
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RxRPC networking subsystem when processing paged fragments. A local
attacker could use this to escalate privileges, or possibly escape a
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A local attacker could use this to escalate privileges, or possibly escape
a container. (CVE-2026-31431)
It was discovered that the Linux kernel did not properly handle shared page
fragments during socket buffer operations, collectively known as Dirty
Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the
RxRPC networking subsystem when processing paged fragments. A local
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This update corrects flaws in the following subsystems:
- ARM64 architecture;
- MIPS architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- ATM drivers;
- RNBD block device driver;
- Ublk userspace block driver;
- Bus devices;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Clocksource drivers;
- CPU idle management framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Hardwar
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CVE-2025-68214 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- RISC-V architecture;
- Cryptographic API;
- InfiniBand drivers;
- IOMMU subsystem;
- Network drivers;
- STMicroelectronics network drivers;
- NVME drivers;
- x86 platform drivers;
- SCSI subsystem;
- SPI subsystem;
- TCM subsystem;
- USB over IP driver;
- File systems infrastructure;
- HFS+ file system;
- Network file system (NFS) server daemon;
- SMB network file system;
- IPv6 networking;
- Tracing infrastructure;
- Timer subsystem;
- B.A.T.M.A.N. meshing protocol;
- Bluetooth subsystem;
- Ethernet bridge;
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CVE-2026-46042 [LOW] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- Rados block device (RBD) driver;
- Compressed RAM block device driver;
- Character device driver;
- TPM device driver;
- Hardware crypto device drivers;
- EDAC drivers;
- GPU drivers;
- Greybus drivers;
- HID
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CVE-2026-43226 Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- MIPS architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- ATM drivers;
- RNBD block device driver;
- Ublk userspace block driver;
- Bus devices;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Clocksource drivers;
- CPU idle management framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Hardware monitoring dr
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Title: Linux kernel (OEM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- DMA engine subsystem;
- InfiniBand drivers;
- STMicroelectronics network drivers;
- Network drivers;
- NVME drivers;
- SCSI subsystem;
- USB over IP driver;
- File systems infrastructure;
- Ext4 file system;
- Network file system (NFS) server daemon;
- SMB network file system;
- Kernel thread helper (kthread);
- IPv6 networking;
- Tracing infrastructure;
- Kernel exit() syscall;
- Scatterlist API;
- B.A.T.M.A.N. meshi
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Linux kernel vulnerabilities
vendor_ubuntu·2026-07-01·CVSS 7.1
CVE-2026-43304 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- Block layer subsystem;
- Cryptographic API;
- DMA engine subsystem;
- InfiniBand drivers;
- STMicroelectronics network drivers;
- Network drivers;
- NVME drivers;
- SCSI subsystem;
- USB over IP driver;
- File systems infrastructure;
- Ext4 file system;
- Network file system (NFS) server daemon;
- SMB network file system;
- Kernel thread helper (kthread);
- IPv6 networking;
- Tracing infrastructure;
- Kernel exit() syscall;
- Scatterlist API;
- B.A.T.M.A.N. meshing protocol;
- Ethernet br
Ubuntu
Linux kernel (OEM) vulnerabilities
vendor_ubuntu·2026-07-01·CVSS 8.8
CVE-2026-46042 [HIGH] Linux kernel (OEM) vulnerabilities
Title: Linux kernel (OEM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that the Linux kernel did not properly handle shared page
fragments during socket buffer operations, collectively known as Dirty
Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the
RxRPC networking subsystem when processing paged fragments. A local
attacker could use this to escalate privileges, or possibly escape a
container. (CVE-2026-43284, CVE-2026-43500, CVE-2026-45998, CVE-2026-46000)
It was discovered that a logic flaw existed in the XFRM ESP-in-TCP
subsystem in the Linux kernel when handling socket buffer fragments. This
flaw is known as Fragnesia. A local attacker could use this to escalate
privileges, or possibly escape a container. (C
Red Hat
kernel: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
vendor_redhat·2026-05-27·CVSS 7.0
CVE-2026-46043 [MEDIUM] CWE-191 kernel: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
kernel: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
A flaw was found in the Linux kernel's RDMA/rxe component. The `rxe_rcv()` function does not adequately validate the BTH pad and ICRC fields of incoming packets before calculating the payload size. A remote attacker could exploit this by sending a specially crafted short packet or a packet with a forged BTH pad. This could lead to an integer underflow, potentially causing unexpected behavior or a denial of service in the receive path.
Package: kernel (Red Hat Enterprise Linux 10) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Affected
Package: kernel (Red Hat Enterprise Linux 8) -
VulDB
Linux Kernel up to 6.6.139/6.12.85/6.18.26/7.0.3 rxe payload_size privilege escalation (Nessus ID 321065)
vuldb·2026-06-14·CVSS 9.1
CVE-2026-46043 [CRITICAL] Linux Kernel up to 6.6.139/6.12.85/6.18.26/7.0.3 rxe payload_size privilege escalation (Nessus ID 321065)
A vulnerability has been found in Linux Kernel up to 6.6.139/6.12.85/6.18.26/7.0.3 and classified as critical. Impacted is the function payload_size of the component rxe. Performing a manipulation results in privilege escalation.
This vulnerability is reported as CVE-2026-46043. The attacker must have access to the local network to execute the attack. No exploit exists.
The affected component should be upgraded.
GHSA
GHSA-ww3w-m544-ppj6: In the Linux kernel, the following vulnerability has been resolved:
RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
rxe_rcv() curre
ghsa_unreviewed·2026-05-27
CVE-2026-46043 GHSA-ww3w-m544-ppj6: In the Linux kernel, the following vulnerability has been resolved:
RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
rxe_rcv() curre
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 use
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/2c0d71ef12f46c57d37bc571f3f2797db7eb50cchttps://git.kernel.org/stable/c/2fd4f8b749309a61c3f3f88ee8891d94f79e1240https://git.kernel.org/stable/c/5fedefec757192dcaad29a664ac332c7601be144https://git.kernel.org/stable/c/7244491dab347f648e661da96dc0febadd9daec3https://git.kernel.org/stable/c/9b924f3a26b21330a837cfe72e819b6393bbeeaahttps://git.kernel.org/stable/c/c4376c672c3648d5bdc31dfffc329d07164f93c4https://git.kernel.org/stable/c/e8ee0e792d475b1067c199ef0af1b6221fa6f43dhttps://git.kernel.org/stable/c/f83519a4c122c9c7a850a2197648a9ff4c67c520
2026-05-27
Published