CVE-2026-43494High· 7.8▾ MidnightPoC availableIn 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(), …
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 42.9 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
7 GitHub repos (last check)
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().
Linux >= 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < c6e51512a784c4a7b86e1a044988696e3b3721faLinux >= 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < 03014551938a0887fa55f18ce49b70158a9c0113Linux >= 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < d84ce1786ce40fdd3dd98db47aec5527817e1ef6Linux >= 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < 9115669faedccdda100428e2d26fd0aac8c50799Linux >= 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < 0bbbff00a15b1df2cac9014d6cf4b6890f473353Linux >= 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < 640e37f58f991546a87540d067279c2c1fa9fe51Linux >= 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < 290e833d1acb1093bc121fcdc97f5e6161157479Linux >= 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 < e174929793195e0cd6a4adb0cad731b39f9019b4Linux 4.17Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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