CVE-2026-43494
net/rds: reset op_nents when zerocopy page pin fails
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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().
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 21, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < c6e51512a784c4a7b86e1a044988696e3b3721fa 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < 03014551938a0887fa55f18ce49b70158a9c0113 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < d84ce1786ce40fdd3dd98db47aec5527817e1ef6 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < 9115669faedccdda100428e2d26fd0aac8c50799 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < 0bbbff00a15b1df2cac9014d6cf4b6890f473353 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < 640e37f58f991546a87540d067279c2c1fa9fe51 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < 290e833d1acb1093bc121fcdc97f5e6161157479 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < e174929793195e0cd6a4adb0cad731b39f9019b4
Linux / Linux
4.17
References
git.kernel.org: https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa git.kernel.org: https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113 git.kernel.org: https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6 git.kernel.org: https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799 git.kernel.org: https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353 git.kernel.org: https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51 git.kernel.org: https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479 git.kernel.org: https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4 github.com: https://github.com/v12-security/pocs/tree/main/pintheft openwall.com: http://www.openwall.com/lists/oss-security/2026/05/21/2 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-43494 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2480434 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43494.json