CVE-2026-43494
Last modified
CVE-2026-43494 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: net/rds: reset op_nents when zerocopy page pin fails When iov_iter_get_pages2() fails in rds_message_zcopy_from_user(), the pinned pages are released with put_page(), and rm->data.op_mmp_znotifier is cleared. But we fail to properly clear rm->data.op_nents. Later when rds_message_purge() is called from rds_sendmsg() the cleanup loop iterates over the incorrectly non zero number of op_nents and frees them again. Fix this by properly resetting op_nents when it should be in rds_message_zcopy_from_user().. EPSS estimates a 0.27% chance of exploitation in the next 30 days.
Description
In the Linux kernel, the following vulnerability has been resolved: net/rds: reset op_nents when zerocopy page pin fails When iov_iter_get_pages2() fails in rds_message_zcopy_from_user(), the pinned pages are released with put_page(), and rm->data.op_mmp_znotifier is cleared. But we fail to properly clear rm->data.op_nents. Later when rds_message_purge() is called from rds_sendmsg() the cleanup loop iterates over the incorrectly non zero number of op_nents and frees them again. Fix this by properly resetting op_nents when it should be in rds_message_zcopy_from_user().
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | >= 4.17, < 5.10.258 | — |
| Linux | Linux Kernel | >= 5.11, < 5.15.209 | — |
| Linux | Linux Kernel | >= 5.16, < 6.1.175 | — |
| Linux | Linux Kernel | >= 6.2, < 6.6.141 | — |
| Linux | Linux Kernel | >= 6.7, < 6.12.91 | — |
| Linux | Linux Kernel | >= 6.13, < 6.18.33 | — |
| Linux | Linux Kernel | >= 6.19, < 7.0.10 | — |
| Linux | Linux Kernel | 7.1 | Rc1 |
References
- https://github.com/v12-security/pocs/tree/main/pintheftExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-43494?
How severe is CVE-2026-43494?
How do I fix CVE-2026-43494?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-43489In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-4349A vulnerability was determined in Duende IdentityServer4 up …6.3
- CVE-2026-43490In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-43491In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-43492In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-43493In the Linux kernel, the following vulnerability has been re…9.8
- CVE-2026-43495In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-43496In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-43497In the Linux kernel, the following vulnerability has been re…7.3
- CVE-2026-43498In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2026-43499In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2026-4350The Perfmatters plugin for WordPress is vulnerable to arbitr…8.1
Are you affected by CVE-2026-43494?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST