Linux Kernel up to 7.1.4 xprtrdma rpcrdma_xprt_connect null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.96

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 6.1.177/6.6.144/6.12.96/6.18.39/7.1.4. Impacted is the function rpcrdma_xprt_connect of the component xprtrdma. The manipulation results in null pointer dereference. This vulnerability is cataloged as CVE-2026-72467. The attack must be initiated from a local position. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.1.177/6.6.144/6.12.96/6.18.39/7.1.4. Affected is the function rpcrdma_xprt_connect of the component xprtrdma. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: xprtrdma: Check frwr_wp_create() during connect frwr_wp_create() creates the singleton Memory Region used to encode padding for Write chunks whose payload length is not XDR-aligned. Its failure paths return a negative errno and leave ep->re_write_pad_mr set to NULL. rpcrdma_xprt_connect() currently ignores that return value. If frwr_wp_create() fails after the rest of the connection setup succeeds, xprt_rdma_connect_worker() treats the connection attempt as successful and sets XPRT_CONNECTED. A later NFS/RDMA read with a non-4-byte-aligned receive page length reaches rpcrdma_encode_write_list(), passes the NULL write-pad MR to encode_rdma_segment(), and dereferences it. This is locally triggerable on an NFS/RDMA client after a connect or reconnect hits a local MR allocation, DMA-map, MR-map, or post-send failure; a remote peer alone cannot force the local MR setup failure. Check the return value and fail the connect as -ENOTCONN, matching the adjacent setup failures. This keeps XPRT_CONNECTED clear and lets the normal reconnect path retry.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-72467 since 08/09/2026. The exploitability is told to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available.

Upgrading to version 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5 or 7.2-rc1 eliminates this vulnerability. Applying the patch 3b252fe1778b2cdd68283146455929801bc2abd7/dd798b76a3481e392820c3ae86ed4592858c6b0f/6b7be4f3feae322f1c2c40a3bdc99db93574a49e/7471e66373a4444a57ef2192f8c4081202c54f45/ef3b79edf14b6bfb0d21a26ccb0463f9cf82c6a9/0f13fc7c7d2e0427517e63c739277a4cd338b0c5 is able to eliminate this problem.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.178/6.6.145/6.12.97/6.18.40/7.1.5/7.2-rc1
Patch: 3b252fe1778b2cdd68283146455929801bc2abd7/dd798b76a3481e392820c3ae86ed4592858c6b0f/6b7be4f3feae322f1c2c40a3bdc99db93574a49e/7471e66373a4444a57ef2192f8c4081202c54f45/ef3b79edf14b6bfb0d21a26ccb0463f9cf82c6a9/0f13fc7c7d2e0427517e63c739277a4cd338b0c5

Timelineinfo

08/09/2026 CVE reserved
08/15/2026 +6 days Advisory disclosed
08/15/2026 +0 days VulDB entry created
08/15/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-72467 (🔒)
GCVE (CVE): GCVE-0-2026-72467
GCVE (VulDB): GCVE-100-391044

Entryinfo

Created: 08/15/2026 17:15
Changes: 08/15/2026 17:15 (59)
Complete: 🔍
Cache ID: 216::103

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