CVE-2026-74623 (GCVE-0-2026-74623)
Vulnerability from cvelistv5
Published
2026-08-22 15:32
Modified
2026-08-23 12:47
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: atlantic: free stranded TX buffers on ring deinit
aq_vec_deinit() drains the TX rings with a single aq_ring_tx_clean()
call, which frees at most AQ_CFG_TX_CLEAN_BUDGET (256) descriptors and
stops at hw_head, which no longer moves once aq_vec_stop() has stopped
the hardware and NAPI. Completed descriptors beyond the budget and
everything still posted in [hw_head, sw_tail) keep their skb or
xdp_frame when the interface goes down: aq_vec_ring_free() then frees
the buffer ring and the references are lost for good.
Today this is a silent memory leak on every interface down under
TX/XDP_TX load. With the conversion of the RX path to page_pool posted
for net-next it becomes much more visible: XDP_TX frames carry fragment
references on the RX ring's page_pool, so a single stranded frame keeps
the pool's inflight count above zero forever. page_pool_destroy() then
never completes, the pool is leaked together with its pages, and
"page_pool_release_retry() stalled pool shutdown" is warned every 60
seconds from that point on, on every ifdown, XDP detach or ring resize
under XDP_TX load.
Bring back aq_ring_tx_deinit() as it was before the removal and use it
for teardown again, with one extension: TX rings can hold xdp_frames
nowadays, so release those too. They are returned with
xdp_return_frame() since this runs in process context.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 Version: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 Version: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 Version: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 Version: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 Version: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 Version: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 Version: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/aquantia/atlantic/aq_ring.c",
"drivers/net/ethernet/aquantia/atlantic/aq_ring.h",
"drivers/net/ethernet/aquantia/atlantic/aq_vec.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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]
},
{
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"product": "Linux",
"programFiles": [
"drivers/net/ethernet/aquantia/atlantic/aq_ring.c",
"drivers/net/ethernet/aquantia/atlantic/aq_ring.h",
"drivers/net/ethernet/aquantia/atlantic/aq_vec.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.11"
},
{
"lessThan": "4.11",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.266",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.217",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.152",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.104",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.45",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.9",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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{
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{
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: atlantic: free stranded TX buffers on ring deinit\n\naq_vec_deinit() drains the TX rings with a single aq_ring_tx_clean()\ncall, which frees at most AQ_CFG_TX_CLEAN_BUDGET (256) descriptors and\nstops at hw_head, which no longer moves once aq_vec_stop() has stopped\nthe hardware and NAPI. Completed descriptors beyond the budget and\neverything still posted in [hw_head, sw_tail) keep their skb or\nxdp_frame when the interface goes down: aq_vec_ring_free() then frees\nthe buffer ring and the references are lost for good.\n\nToday this is a silent memory leak on every interface down under\nTX/XDP_TX load. With the conversion of the RX path to page_pool posted\nfor net-next it becomes much more visible: XDP_TX frames carry fragment\nreferences on the RX ring\u0027s page_pool, so a single stranded frame keeps\nthe pool\u0027s inflight count above zero forever. page_pool_destroy() then\nnever completes, the pool is leaked together with its pages, and\n\"page_pool_release_retry() stalled pool shutdown\" is warned every 60\nseconds from that point on, on every ifdown, XDP detach or ring resize\nunder XDP_TX load.\n\nBring back aq_ring_tx_deinit() as it was before the removal and use it\nfor teardown again, with one extension: TX rings can hold xdp_frames\nnowadays, so release those too. They are returned with\nxdp_return_frame() since this runs in process context."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-23T12:47:48.573Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/a14ceebd13bf857bfca052bc5a6bd49e737912be"
},
{
"url": "https://git.kernel.org/stable/c/4f1c20873f70b4b22ef86dc38dad1fda8e169bcd"
},
{
"url": "https://git.kernel.org/stable/c/307d80193b4a4a75b8dc4e0d3162be3755abbed7"
},
{
"url": "https://git.kernel.org/stable/c/7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c"
},
{
"url": "https://git.kernel.org/stable/c/3447641d361dcc5511841d986ad4d849b2900d9b"
},
{
"url": "https://git.kernel.org/stable/c/b13202d401e1a20fec89b0cda733dcbaf279f79d"
},
{
"url": "https://git.kernel.org/stable/c/dd633280de7fdfd60dc4fcf63d04e2ad95b43269"
},
{
"url": "https://git.kernel.org/stable/c/452636ea5410a96e02ebaaf80b21e3620b98e0dd"
}
],
"title": "net: atlantic: free stranded TX buffers on ring deinit",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-74623",
"datePublished": "2026-08-22T15:32:06.467Z",
"dateReserved": "2026-08-15T05:44:03.921Z",
"dateUpdated": "2026-08-23T12:47:48.573Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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