CVE-2026-43494: net/rds: reset op_nents when zerocopy page pin fails
- Is it exploited?
Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .
VulnCheck KEV lists it since . It cites 1 public report, the first from .
- How likely is exploitation in the next 30 days?
- 0.4%
Up from 0.2% on .
EPSS score, percentile 35.4 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- 7.8 High
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- 4.17
Unaffected before 4.17; 5.10.258; 5.15.209; 6.1.175; 6.6.141; 6.12.91; and 3 more
Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
net/rds: reset op_nents when zerocopy page pin fails
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: CVE List, as of . About the data.
What to do
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (2 products)
| Status | Versions |
|---|---|
| Affected | from 0cebaccef3ac to before c6e51512a784 |
| Affected | from 0cebaccef3ac to before 03014551938a |
| Affected | from 0cebaccef3ac to before d84ce1786ce4 |
| Affected | from 0cebaccef3ac to before 9115669faedc |
| Affected | from 0cebaccef3ac to before 0bbbff00a15b |
| Affected | from 0cebaccef3ac to before 640e37f58f99 |
| Affected | from 0cebaccef3ac to before 290e833d1acb |
| Affected | from 0cebaccef3ac to before e17492979319 |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Affected | 4.17 |
| Unaffected | before 4.17 |
| Unaffected | 5.10.258 |
| Unaffected | 5.15.209 |
| Unaffected | 6.1.175 |
| Unaffected | 6.6.141 |
| Unaffected | 6.12.91 |
| Unaffected | 6.18.33 |
| Unaffected | 7.0.10 |
| Unaffected | 7.1 |
Versions not listed are: affected.
Versions the record lists as unaffected: 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10, 7.1.
Source: CVE List, as of . About the data.
Weakness
CWE-415
- CWE-415: Double Free
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| CVE record last updated |
References
9
Known exploited Linux vulnerabilities
- CVE-2026-46300: Linux Kernel Missing Initialization of a Variable Vulnerability
- CVE-2025-39682: Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
- CVE-2025-39964: Linux Kernel Race Condition Vulnerability
- CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability
- CVE-2026-53362: Linux Kernel Unspecified Vulnerability