CVE-2026-43494

Advisory lineage Upstream: 0 Downstream: 74
Awaiting Analysis
Published: 21 May 2026, 10:49
Last modified:15 Jul 2026, 00:55

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.27% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

21 May 2026, 10:49
Published
Vulnerability first disclosed
15 Jul 2026, 00:55
Last Modified
Vulnerability information updated

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().

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.27%• Percentile: 19%

Techniques & Countermeasures

  • CWE-1341•Multiple Releases of Same Resource or Handle

    The product attempts to close or release a resource or handle more than once, without any successful open between the close operations.

Affected Systems

  • linux•linux

    ≥ 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3, < c6e51512a784c4a7b86e1a044988696e3b3721fa | ≥ 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3, < 03014551938a0887fa55f18ce49b70158a9c0113 | ≥ 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3, < d84ce1786ce40fdd3dd98db47aec5527817e1ef6 | ≥ 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3, < 9115669faedccdda100428e2d26fd0aac8c50799 | ≥ 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3, < 0bbbff00a15b1df2cac9014d6cf4b6890f473353 | ≥ 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3, < 640e37f58f991546a87540d067279c2c1fa9fe51 | ≥ 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3, < 290e833d1acb1093bc121fcdc97f5e6161157479 | ≥ 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3, < e174929793195e0cd6a4adb0cad731b39f9019b4 | 4.17

References (13)