CVE-2026-43494— net/rds: reset op_nents when zerocopy page pin fails
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I. Basic Information for CVE-2026-43494
Vulnerability Information
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Vulnerability Title
net/rds: reset op_nents when zerocopy page pin fails
Source: NVD (National Vulnerability Database)
Vulnerability 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().
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-43494
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Patch · 1
Same Patch Batch · Linux · 2026-05-21 · 8 CVEs total
| CVE-2026-43502 | net/rds: handle zerocopy send cleanup before the message is queued | |
| CVE-2026-43501 | ipv6: rpl: reserve mac_len headroom when recompressed SRH grows | |
| CVE-2026-43498 | accel/ivpu: Disallow re-exporting imported GEM objects | |
| CVE-2026-43499 | rtmutex: Use waiter::task instead of current in remove_waiter() | |
| CVE-2026-43497 | fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-after-free | |
| CVE-2026-43496 | net/sched: sch_red: Replace direct dequeue call with peek and qdisc_dequeue_peeked | |
| CVE-2026-43495 | net: wwan: t7xx: validate port_count against message length in t7xx_port_enum_msg_handler |
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects - CVE-2026-43499
rtmutex: Use waiter::task instead of current in remove_waite - CVE-2026-43497
fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-aft
Same vendor: Linux
- CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects - CVE-2026-43499
rtmutex: Use waiter::task instead of current in remove_waite - CVE-2026-43497
fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-aft
V. Comments for CVE-2026-43494
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