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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-43502

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

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: net/rds: handle zerocopy send cleanup before the message is queued A zerocopy send can fail after user pages have been pinned but before the message is attached to the sending socket. The purge path currently infers zerocopy state from rm->m_rs, so an unqueued message can be cleaned up as if it owned normal payload pages. However, zerocopy ownership is really determined by the presence of op_mmp_znotifier, regardless of whether the message has reached the socket queue. Capture op_mmp_znotifier up front in rds_message_purge() and use it as the cleanup discriminator. If the message is already associated with a socket, keep the existing completion path. Otherwise, drop the pinned page accounting directly and release the notifier before putting the payload pages. This keeps early send failure cleanup consistent with the zerocopy lifetime rules without changing the normal queued completion path.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < e9aefdc5c53fe9aed108c14e3d155710a1bb14c9affected
  • 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 46662f7dc59475995609bf3e9d27eb36f4acf26faffected
  • 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 1e262db7675e27f42c3f3f47d6011855f4454f24affected
  • 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 21d70744e6d3bbf9293aa1ee6fba7c53ad75275eaffected
  • 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 3abc8983b2bae3f487f77d9da5527d7d6b210d46affected
  • 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 14ef6fd18db2494098b21e0471bf27a1d8e9993eaffected
  • 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 0f5c185fc79a59ee9991234dd6d2a3e5afa6e75baffected
  • 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 to < 44b550d88b267320459d518c0743a241ab2108faaffected

Linux Linux

Default version status: affected

  • 4.17affected
  • 0 to < 4.17unaffected
  • 5.10.258 to ≤ 5.10.*unaffected
  • 5.15.209 to ≤ 5.15.*unaffected
  • 6.1.175 to ≤ 6.1.*unaffected
  • 6.6.140 to ≤ 6.6.*unaffected
  • 6.12.88 to ≤ 6.12.*unaffected
  • 6.18.30 to ≤ 6.18.*unaffected
  • 7.0.7 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References