01 Record

CVE-2026-43502

net/rds: handle zerocopy send cleanup before the message is queued

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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02 Description

net/rds: handle zerocopy send cleanup before the message is queued

03 Exploitation and scoring

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.32% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 25.2% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-15.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-05-21 12:17Z5 MO AGO

Last updated

2026-10-15 01:19Z14 DAYS AGO

Reserved

2026-05-01

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-401Missing Release of Memory after Effective LifetimeVariant

Data version

5.2

Document digest

b669accc89cb10f5917e714df061162e2d2c48d8110677dffa2cf0cd5fdfc4da

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < e9aefdc5c53fe9aed108c14e3d155710a1bb14c9, 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 46662f7dc59475995609bf3e9d27eb36f4acf26f, 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 1e262db7675e27f42c3f3f47d6011855f4454f24, 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 21d70744e6d3bbf9293aa1ee6fba7c53ad75275e, 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 3abc8983b2bae3f487f77d9da5527d7d6b210d46, 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 14ef6fd18db2494098b21e0471bf27a1d8e9993e, 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 0f5c185fc79a59ee9991234dd6d2a3e5afa6e75b, 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 44b550d88b267320459d518c0743a241ab2108fa, 4.17—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/e9aefdc5c53fe9aed108c14e3d155710a1bb14c9
git.kernel.orghttps://git.kernel.org/stable/c/46662f7dc59475995609bf3e9d27eb36f4acf26f
git.kernel.orghttps://git.kernel.org/stable/c/1e262db7675e27f42c3f3f47d6011855f4454f24
git.kernel.orghttps://git.kernel.org/stable/c/21d70744e6d3bbf9293aa1ee6fba7c53ad75275e
git.kernel.orghttps://git.kernel.org/stable/c/3abc8983b2bae3f487f77d9da5527d7d6b210d46
git.kernel.orghttps://git.kernel.org/stable/c/14ef6fd18db2494098b21e0471bf27a1d8e9993e
git.kernel.orghttps://git.kernel.org/stable/c/0f5c185fc79a59ee9991234dd6d2a3e5afa6e75b
git.kernel.orghttps://git.kernel.org/stable/c/44b550d88b267320459d518c0743a241ab2108fa
github.comhttps://github.com/NebuSec/CyberMeowfia/tree/main/security-research/Linux-CVE-2026-43502-openSUSE-6.4.0-150600exploit
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-784472.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.176-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.88-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 7.0.7-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.