CVE-2026-43494

HIGH

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().

CVSS v3.1 Score

7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Published: 5/21/2026Modified: 10/19/2026

Related Intelligence (1)

CRITICALApt

Impact of Linux Kernel vulnerabilities on B&R products

<p><a href="https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-174-06.json"><strong>View CSAF</strong></a></p> <h2>Summary</h2> <p><strong>B&amp;R is aware of publicly reported vulnerabilities affecting the Linux kernel versions shipped with the products listed as affected in the advisory. Successful local exploitation of these vulnerabilities could allow an attacker to

CVE-2026-31431CVE-2026-43284
CISA Advisories

References (13)

https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113Patchhttps://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353Patchhttps://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479Patchhttps://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51Patchhttps://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799Patchhttps://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721faPatchhttps://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6Patchhttps://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4Patchhttps://github.com/v12-security/pocs/tree/main/pintheftExploitThird Party Advisoryhttp://www.openwall.com/lists/oss-security/2026/05/21/2Mailing Listhttps://access.redhat.com/security/cve/CVE-2026-43494https://bugzilla.redhat.com/show_bug.cgi?id=2480434https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43494.json