CVE-2026-43494 (GCVE-0-2026-43494)
Vulnerability from cvelistv5
Published
2026-05-21 10:49
Modified
2026-06-01 16:15
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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().
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 Version: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 Version: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 Version: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 Version: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 Version: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 Version: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 Version: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 |
||
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: reset op_nents when zerocopy page pin fails\n\nWhen iov_iter_get_pages2() fails in rds_message_zcopy_from_user(),\nthe pinned pages are released with put_page(), and\nrm-\u003edata.op_mmp_znotifier is cleared. But we fail to properly\nclear rm-\u003edata.op_nents.\n\nLater when rds_message_purge() is called from rds_sendmsg() the\ncleanup loop iterates over the incorrectly non zero number of\nop_nents and frees them again.\n\nFix this by properly resetting op_nents when it should be in\nrds_message_zcopy_from_user()."
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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