CVE-2026-43494

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 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 35% of CVEs (scores of 2026-10-25)

CWEs

CWE-415, CWE-1341

Published

2026-05-21

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113
• https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353
• https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479
• https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51
• https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799

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