net/mlx5e: Fix DMA FIFO desync on error CQE SQ recovery
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix DMA FIFO desync on error CQE SQ recovery In case of a TX error CQE, a recovery flow is triggered, mlx5e_reset_txqsq_cc_pc() resets dma_fifo_cc to 0 but not dma_fifo_pc, desyncing the DMA FIFO producer and consumer. After recovery, the producer pushes new DMA entries at the old dma_fifo_pc, while the consumer reads from position 0. This causes us to unmap stale DMA addresses from before the recovery. The DMA FIFO is a purely software construct with no HW counterpart. At the point of reset, all WQEs have been flushed so dma_fifo_cc is already equal to dma_fifo_pc. There is no need to reset either counter, similar to how skb_fifo pc/cc are untouched. Remove the 'dma_fifo_cc = 0' reset. This fixes the following WARNING: WARNING: CPU: 0 PID: 0 at drivers/iommu/dma-iommu.c:1240 iommu_dma_unmap_page+0x79/0x90 Modules linked in: mlx5_vdpa vringh vdpa bonding mlx5_ib mlx5_vfio_pci ipip mlx5_fwctl tunnel4 mlx5_core ib_ipoib geneve ip6_gre ip_gre gre nf_tables ip6_tunnel rdma_ucm ib_uverbs ib_umad vfio_pci vfio_pci_core act_mirred act_skbedit act_vlan vhost_net vhost tap ip6table_mangle ip6table_nat ip6table_filter ip6_tables iptable_mangle cls_matchall nfnetlink_cttimeout act_gact cls_flower sch_ingress vhost_iotlb iptable_raw tunnel6 vfio_iommu_type1 vfio openvswitch nsh rpcsec_gss_krb5 auth_rpcgss oid_registry xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink iptable_nat nf_nat xt_addrtype br_n
CVE-2026-43466
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-43466
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261",
"lessThan": "821f85d619f7f22cda7b9d7de89cf5eeb1d11544",
"versionType": "git"
},
{
"status": "affected",
"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261",
"lessThan": "6eb68ecc5acc3b319986566c595990b8a7265b23",
"versionType": "git"
},
{
"status": "affected",
"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261",
"lessThan": "6f41f7812bfa7f991b732a4b45c5c52fc4be3b4e",
"versionType": "git"
},
{
"status": "affected",
"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261",
"lessThan": "383b37c04a4827ba60b2bafc1a6cdfd995aed58f",
"versionType": "git"
},
{
"status": "affected",
"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261",
"lessThan": "9c5ee9b981ee050b73fdf3f4a2464d6f1a8e10a8",
"versionType": "git"
},
{
"status": "affected",
"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261",
"lessThan": "ce1b19dd0684eeb68a124c11085bd611260b36d9",
"versionType": "git"
},
{
"status": "affected",
"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261",
"lessThan": "829efcccfa8f69db5dc8332961295587d218cee6",
"versionType": "git"
},
{
"status": "affected",
"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261",
"lessThan": "1633111d69053512d099658d4a05fc736fab36b0",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.253",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.167",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.130",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.78",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.19",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.9",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-43466
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40081 · Revision 1
- Added to Heist Feed
- Publisher date