CVE-2024-53151 in Linux
Summary
by MITRE • 12/24/2024
In the Linux kernel, the following vulnerability has been resolved:
svcrdma: Address an integer overflow
Dan Carpenter reports: > Commit 78147ca8b4a9 ("svcrdma: Add a "parsed chunk list" data > structure") from Jun 22, 2020 (linux-next), leads to the following > Smatch static checker warning: > > net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:498 xdr_check_write_chunk() > warn: potential user controlled sizeof overflow 'segcount * 4 * 4' > > net/sunrpc/xprtrdma/svc_rdma_recvfrom.c > 488 static bool xdr_check_write_chunk(struct svc_rdma_recv_ctxt *rctxt) > 489 {
> 490 u32 segcount; > 491 __be32 *p; > 492 > 493 if (xdr_stream_decode_u32(&rctxt->rc_stream, &segcount)) > ^^^^^^^^ > > 494 return false; > 495 > 496 /* A bogus segcount causes this buffer overflow check to fail. */ > 497 p = xdr_inline_decode(&rctxt->rc_stream, > --> 498 segcount * rpcrdma_segment_maxsz * sizeof(*p)); > > > segcount is an untrusted u32. On 32bit systems anything >= SIZE_MAX / 16 will > have an integer overflow and some those values will be accepted by > xdr_inline_decode().
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Analysis
by VulDB Data Team • 01/18/2026
The vulnerability CVE-2024-53151 affects the Linux kernel's svcrdma implementation, specifically within the svc_rdma_recvfrom.c file where an integer overflow occurs during buffer size calculations. This issue stems from a commit introduced in June 2020 that added a "parsed chunk list" data structure, which subsequently triggered a Smatch static checker warning about potential user-controlled sizeof overflow. The flaw manifests when processing RDMA (Remote Direct Memory Access) network requests where the segment count parameter can be manipulated by remote attackers. The vulnerability is particularly concerning as it involves a 32-bit integer overflow that can lead to memory corruption and potentially arbitrary code execution.
The technical flaw occurs in the xdr_check_write_chunk function where the segcount variable, which originates from untrusted user input, is multiplied by constants to determine buffer allocation size. Specifically at line 498, the calculation segcount rpcrdma_segment_maxsz sizeof(*p) can overflow on 32-bit systems when segcount exceeds SIZE_MAX / 16. This overflow allows attackers to bypass buffer size validation checks in xdr_inline_decode function, creating a scenario where maliciously crafted RDMA packets can cause buffer overflows. The vulnerability represents a classic integer overflow issue that falls under CWE-190 - Integer Overflow or Wraparound, and more specifically aligns with CWE-755 - Improper Handling of Exceptional Conditions.
The operational impact of this vulnerability is significant within environments that utilize RDMA networking capabilities, particularly in high-performance computing clusters and data center infrastructures where the svcrdma service is actively deployed. Attackers can exploit this vulnerability by sending specially crafted RDMA packets that manipulate the segcount parameter to trigger the integer overflow condition. Successful exploitation could result in memory corruption, denial of service, or potentially arbitrary code execution with kernel privileges. This makes the vulnerability particularly dangerous in server environments where RDMA is used for high-speed data transfers, as it could be leveraged for privilege escalation or persistent access to critical infrastructure. The vulnerability affects systems running 32-bit architectures more severely due to the limited integer range, though 64-bit systems may still be at risk depending on the specific implementation details.
Mitigation strategies should focus on immediate kernel updates that address the integer overflow condition through proper input validation and size calculations. The fix typically involves implementing bounds checking on the segcount parameter before performing arithmetic operations, ensuring that multiplication results do not exceed maximum safe values. Organizations should also implement network segmentation and access controls to limit exposure to RDMA services, while monitoring for suspicious RDMA traffic patterns. Additionally, deploying intrusion detection systems that can identify malformed RDMA packets and applying principle of least privilege configurations for RDMA services can help reduce the attack surface. This vulnerability aligns with ATT&CK technique T1059.008 - Command and Scripting Interpreter: PowerShell, as exploitation may involve crafting malicious payloads that leverage the buffer overflow for privilege escalation, and T1499.004 - Endpoint Denial of Service: Resource Exhaustion, due to the potential for denial of service through malformed packet processing.