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Echo: linux: security update to 6.1.176-1

high Tenable Self-Hosted Container Security Plugin ID 461043

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Reject unknown opcodes
 before ICRC processing Even after applying commit 7244491dab34 ("RDMA/rxe: Validate pad and ICRC before
 payload_size() in rxe_rcv"), a single unauthenticated UDP packet can still trigger panic. That patch
 handled payload_size() underflow only for valid opcodes with short packets, not for packets carrying an
 unknown opcode. The unknown-opcode OOB read described below predates that commit and reaches back to the
 initial Soft RoCE driver. The check added there reads pkt->paylen < header_size(pkt) + bth_pad(pkt) +
 RXE_ICRC_SIZE where header_size(pkt) expands to rxe_opcode[pkt->opcode].length. The rxe_opcode[] array has
 256 entries but is only populated for defined IB opcodes; any other entry (for example opcode 0xff) is
 zero-initialized, so length == 0 and the check degenerates to pkt->paylen < 0 + bth_pad(pkt) +
 RXE_ICRC_SIZE which does not constrain pkt->paylen enough. rxe_icrc_hdr() then computes
 rxe_opcode[pkt->opcode].length - RXE_BTH_BYTES which underflows when length == 0 and passes a huge value
 to rxe_crc32(), causing an out-of-bounds read of the skb payload. Reproduced on v7.0-rc7 with that fix
 applied, QEMU/KVM with CONFIG_RDMA_RXE=y and CONFIG_KASAN=y, after rdma link add rxe0 type rxe netdev eth0
 A single 48-byte UDP packet to port 4791 with BTH opcode=0xff and QPN=IB_MULTICAST_QPN triggers: BUG:
 KASAN: slab-out-of-bounds in crc32_le+0x115/0x170 Read of size 1 at addr ... The buggy address is located
 0 bytes to the right of allocated 704-byte region Call Trace: crc32_le+0x115/0x170
 rxe_icrc_hdr.isra.0+0x226/0x300 rxe_icrc_check+0x13f/0x3a0 rxe_rcv+0x6e1/0x16e0
 rxe_udp_encap_recv+0x20a/0x320 udp_queue_rcv_one_skb+0x7ed/0x12c0 Subsequent packets with the same shape
 fault on unmapped memory and panic the kernel. The trigger requires only module load and "rdma link add";
 no QP, no connection, and no authentication. Fix this by rejecting packets whose opcode has no
 rxe_opcode[] entry, detected via the zero mask or zero length, before any length arithmetic runs.
 (CVE-2026-46133)

Solution

Update the linux library and its related packages to version 6.1.176-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-46133

Plugin Details

Severity: High

ID: 461043

Version: Revision 1.2

Type: Local

Published: 10/2/2026

Updated: 10/5/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.77

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-46133

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/28/2026

Vulnerability Publication Date: 5/28/2026

Reference Information

CVE: CVE-2026-46133