Kernel crash via uninitialized transport arguments
Published Aug 15, 2026 · Updated Aug 15, 2026
Uninitialized data use in Linux sunrpc allows local users to crash the kernel or copy sensitive stack data into a transport via a sysfs write. In rpc_sysfs_xprt_switch_add_xprt_store(), a stack-allocated xprt_create_args object leaves srcaddr, bc_xps, and flags uninitialized before transport setup consumes them. Exploitation requires root or CAP_DAC_OVERRIDE access to the add_xprt attribute on a writable /sys; hardened builds that zero stack variables are not affected.
Summary
What happened
Uninitialized data use in Linux sunrpc allows local users to crash the kernel or copy sensitive stack data into a transport via a sysfs write. In rpc_sysfs_xprt_switch_add_xprt_store(), a stack-allocated xprt_create_args object leaves srcaddr, bc_xps, and flags uninitialized before transport setup consumes them. Exploitation requires root or CAP_DAC_OVERRIDE access to the add_xprt attribute on a writable /sys; hardened builds that zero stack variables are not affected.
The record
- CVE
- CVE-2026-72150
- Published
- Aug 15, 2026
- Updated
- Aug 15, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-824, T1499
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Aug 15, 2026CVE publishedPublication date reported by the CVE source.
- Aug 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <6.18.40
- Affected versionversion=0 <7.1.5
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <17d90b68c3a3d7d7e95b49e1fe9381a723f637a8
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7d3ce3bd23c062a7c1c6d372d1b08e48b9e17cc3
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <933654508b2bc36e2c3c086c0365e2403fb2141f
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo