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CVE-2026-43494 Details

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.x Severity and Vector Strings:

CNA: redhat-SADPCVSS-B:7 HIGHVector:CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://access.redhat.com/security/cve/CVE-2026-43494	redhat-SADP
https://bugzilla.redhat.com/show_bug.cgi?id=2480434	redhat-SADP
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43494.json	redhat-SADP
https://github.com/v12-security/pocs/tree/main/pintheft	kernel.org	ExploitThird Party Advisory
https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113	kernel.org	Patch
https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353	kernel.org	Patch
https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479	kernel.org	Patch
https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51	kernel.org	Patch
https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799	kernel.org	Patch
https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa	kernel.org	Patch
https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6	kernel.org	Patch
https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4	kernel.org	Patch
http://www.openwall.com/lists/oss-security/2026/05/21/2	CVE	Mailing List

see all 13 references

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information to Classify Weakness	[email protected]
CWE-1341	Multiple Releases of Same Resource or Handle	redhat-SADP

Affected Products

Product	Versions
linux linux kernel	>= 4.17, < 5.10.258 >= 5.11, < 5.15.209 >= 5.16, < 6.1.175 >= 6.2, < 6.6.141 >= 6.7, < 6.12.91
CPE cpe:2.3:o:linux:linux_kernel:::::::: cpe:2.3:o:linux:linux_kernel:7.1:rc1:::::: cpe:2.3:o:linux:linux_kernel:7.1:rc2:::::: cpe:2.3:o:linux:linux_kernel:7.1:rc3:::::: Remediation No remediation found in references.

Change History

11 change records found show changes

Date	Action	Recorded By
Jul 23, 2026	CVE Translated	[email protected]
Jul 15, 2026	CVE Modified	redhat-SADP
Jun 30, 2026	CVE Modified	redhat-SADP
Jun 26, 2026	Initial Analysis	[email protected]
Jun 17, 2026	CVE Modified	kernel.org
Jun 12, 2026	CVE Modified	kernel.org
Jun 1, 2026	CVE Modified	kernel.org
May 30, 2026	CVE Modified	kernel.org
May 23, 2026	CVE Modified	kernel.org
May 21, 2026	CVE Modified	CVE
May 21, 2026	New CVE Received	kernel.org