xsk: honor XDP_TX_METADATA in zero-copy path
In the Linux kernel, the following vulnerability has been resolved: xsk: honor XDP_TX_METADATA in zero-copy path The zero-copy path reads TX metadata whenever the UMEM has metadata space, even if the descriptor does not set XDP_TX_METADATA. Pass descriptor options through the metadata helpers and ignore metadata unless the option is set. This does not fix the existing per-WQE metadata handling for mlx5 MPWQEs. Only the descriptor that starts a session passes through xsk_tx_metadata_request() and configures offload state shared by the batch. Metadata on descriptors joining an open session is therefore not validated and does not configure its requested offloads. In addition, a non-NULL metadata pointer from such a descriptor is treated as a timestamp completion request even when XDP_TXMD_FLAGS_TIMESTAMP is not set, so its metadata union can be overwritten with an unrequested timestamp. Fixing mixed metadata states within one MPWQE requires a separate change.
CVE-2026-90086
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-2026-90086
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": "48eb03dd26304c24f03bdbb9382e89c8564e71df",
"lessThan": "8ba0d143e471c85f8a116707c0b42bf046b0a7b3",
"versionType": "git"
},
{
"status": "affected",
"version": "48eb03dd26304c24f03bdbb9382e89c8564e71df",
"lessThan": "53a5b262d706b572840cbe8feae392538077ee19",
"versionType": "git"
},
{
"status": "affected",
"version": "48eb03dd26304c24f03bdbb9382e89c8564e71df",
"lessThan": "bf9387488d6394845076928c6ca5315ce5d84f54",
"versionType": "git"
},
{
"status": "affected",
"version": "48eb03dd26304c24f03bdbb9382e89c8564e71df",
"lessThan": "a6e4b9a6deb9362ef7a0706c70d674e92fe1411a",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/intel/igc/igc_main.c",
"drivers/net/ethernet/mellanox/mlx5/core/en/xsk/tx.c",
"drivers/net/ethernet/stmicro/stmmac/stmmac_main.c",
"include/net/libeth/xsk.h",
"include/net/xdp_sock_drv.h",
"include/net/xsk_buff_pool.h",
"net/xdp/xsk_buff_pool.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/intel/igc/igc_main.c",
"drivers/net/ethernet/mellanox/mlx5/core/en/xsk/tx.c",
"drivers/net/ethernet/stmicro/stmmac/stmmac_main.c",
"include/net/libeth/xsk.h",
"include/net/xdp_sock_drv.h",
"include/net/xsk_buff_pool.h",
"net/xdp/xsk_buff_pool.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90086
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48598 · Revision 1
- Added to Heist Feed
- Publisher date