In the Linux kernel, the following vulnerability has been resolved:
net: systemport: Add global locking for descriptor lifecycle
The descriptor list is a shared resource across all of the transmit queues, and the locking mechanism used today only protects concurrency across a given transmit queue between the transmit and reclaiming. This creates an opportunity for the SYSTEMPORT hardware to work on corrupted descriptors if we have multiple producers at once which is the case when using multiple transmit queues.
This was particularly noticeable when using multiple flows/transmit queues and it showed up in interesting ways in that UDP packets would get a correct UDP header checksum being calculated over an incorrect packet length. Similarly TCP packets would get an equally correct checksum computed by the hardware over an incorrect packet length.
The SYSTEMPORT hardware maintains an internal descriptor list that it re-arranges when the driver produces a new descriptor anytime it writes to the WRITE_PORT_{HI,LO} registers, there is however some delay in the hardware to re-organize its descriptors and it is possible that concurrent TX queues eventually break this internal allocation scheme to the point where the length/status part of the descriptor gets used for an incorrect data buffer.
The fix is to impose a global serialization for all TX queues in the short section where we are writing to the WRITE_PORT_{HI,LO} registers which solves the corruption even with multiple concurrent TX queues being used.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 30, 2024 | Jun 19, 2024 |
| Suse | — | Upgrade kernel-rtUpgrade kernel-obs-buildUpgrade ocfs2-kmp-azureUpgrade kselftests-kmp-rtUpgrade kernel-azureUpgrade kernel-rt-extraUpgrade reiserfs-kmp-azureUpgrade kernel-docsUpgrade kernel-rt_debug-develUpgrade dlm-kmp-azureUpgrade kernel-rt-optionalUpgrade kernel-source-rtUpgrade kernel-rt-vdsoUpgrade dlm-kmp-rtUpgrade kernel-defaultUpgrade kernel-azure-develUpgrade gfs2-kmp-azureUpgrade kernel-rt_debug-livepatch-develUpgrade reiserfs-kmp-rtUpgrade kernel-rt-livepatchUpgrade kselftests-kmp-azureUpgrade cluster-md-kmp-rtUpgrade kernel-default-baseUpgrade kernel-rt-livepatch-develUpgrade kernel-azure-optionalUpgrade kernel-rt_debugUpgrade kernel-azure-baseUpgrade kernel-syms-azureUpgrade kernel-azure-livepatch-develUpgrade kernel-devel-rtUpgrade kernel-azure-vdsoUpgrade kernel-devel-azureUpgrade cluster-md-kmp-azureUpgrade kernel-symsUpgrade kernel-macrosUpgrade kernel-default-manUpgrade kernel-rt_debug-vdsoUpgrade kernel-syms-rtUpgrade kernel-sourceUpgrade kernel-azure-extraUpgrade ocfs2-kmp-rtUpgrade gfs2-kmp-rtUpgrade kernel-source-azureUpgrade kernel-default-extraUpgrade kernel-rt-develUpgrade kernel-default-develUpgrade kernel-devel | Aug 9, 2024 | Jun 19, 2024 |
| Ubuntu | — | Upgrade linux-image-generic-lts-xenialUpgrade linux-image-lowlatencyUpgrade linux-image-fipsUpgrade linux-image-4.4.0-1143-awsUpgrade linux-image-genericUpgrade linux-image-virtual-lts-xenialUpgrade linux-image-4.4.0-268-lowlatencyUpgrade linux-image-virtualUpgrade linux-image-4.4.0-1144-kvmUpgrade linux-image-4.4.0-1113-fipsUpgrade linux-image-4.4.0-268-genericUpgrade linux-image-4.4.0-1181-awsUpgrade linux-image-kvmUpgrade linux-image-awsUpgrade linux-image-lowlatency-lts-xenial | Nov 19, 2024 | Jun 19, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Jun 19, 2024 |
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