CVE-2026-43494 (GCVE-0-2026-43494)
Vulnerability from cvelistv5 – Published: 2026-05-21 10:49 – Updated: 2026-06-30 12:08
VLAI
EPSS
VEX
Title
net/rds: reset op_nents when zerocopy page pin fails
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().
Severity
CWE
- CWE-1341 - Multiple Releases of Same Resource or Handle
Assigner
References
13 references
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 , < c6e51512a784c4a7b86e1a044988696e3b3721fa
(git)
Affected: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 , < 03014551938a0887fa55f18ce49b70158a9c0113 (git) Affected: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 , < d84ce1786ce40fdd3dd98db47aec5527817e1ef6 (git) Affected: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 , < 9115669faedccdda100428e2d26fd0aac8c50799 (git) Affected: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 , < 0bbbff00a15b1df2cac9014d6cf4b6890f473353 (git) Affected: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 , < 640e37f58f991546a87540d067279c2c1fa9fe51 (git) Affected: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 , < 290e833d1acb1093bc121fcdc97f5e6161157479 (git) Affected: 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 , < e174929793195e0cd6a4adb0cad731b39f9019b4 (git) |
|
| Linux | Linux |
Affected:
4.17
Unaffected: 0 , < 4.17 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6 |
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9 |
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Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/05/21/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]},{\"url\":\"https://access.redhat.com/security/cve/CVE-2026-43494\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2480434\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43494.json\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"}]}}",
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-06-30T03:58:33+00:00",
"cve": "CVE-2026-43494",
"id": "CVE-2026-43494",
"initial_release_date": "2026-05-21T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: net/rds: reset op_nents when zerocopy page pin fails",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43494.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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