CVE-2026-74623
Full vulnerability record from the local CVENow database.
Description
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.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-08-22 16:16:35.157000
Last modified
2026-11-06 17:19:52
View original CVE JSON
{
"id": "CVE-2026-74623",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-08-22T16:16:35.157",
"lastModified": "2026-11-06T17:19:52.000",
"vulnStatus": "Received",
"cveTags": [],
"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's page_pool, so a single stranded frame keeps\nthe pool's 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."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: atlantic: liberar búferes TX varados en la desinicialización del anillo\n\naq_vec_deinit() vacía los anillos TX con una única llamada a aq_ring_tx_clean(), que libera como máximo AQ_CFG_TX_CLEAN_BUDGET (256) descriptores y se detiene en hw_head, que ya no se mueve una vez que aq_vec_stop() ha detenido el hardware y NAPI. Los descriptores completados más allá del presupuesto y todo lo que aún está publicado en [hw_head, sw_tail) conservan su skb o xdp_frame cuando la interfaz se desactiva: aq_vec_ring_free() luego libera el anillo de búferes y las referencias se pierden para siempre.\n\nHoy esto es una fuga de memoria silenciosa en cada desactivación de interfaz bajo carga de TX/XDP_TX. Con la conversión de la ruta RX a page_pool publicada para net-next se vuelve mucho más visible: los frames XDP_TX llevan referencias de fragmentos en el page_pool del anillo RX, por lo que un único frame varado mantiene el contador 'inflight' del pool por encima de cero para siempre. page_pool_destroy() entonces nunca se completa, el pool se fuga junto con sus páginas, y se advierte 'page_pool_release_retry() stalled pool shutdown' cada 60 segundos a partir de ese momento, en cada ifdown, desvinculación de XDP o redimensionamiento de anillo bajo carga de XDP_TX.\n\nRecuperar aq_ring_tx_deinit() como estaba antes de su eliminación y usarlo para el desmantelamiento de nuevo, con una extensión: los anillos TX pueden contener xdp_frames hoy en día, así que liberar esos también. Se devuelven con xdp_return_frame() ya que esto se ejecuta en contexto de proceso."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"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",
"versions": [
{
"version": "eb36bedf28be6d986bdbcfa375bab08ffa45efd8",
"lessThan": "a14ceebd13bf857bfca052bc5a6bd49e737912be",
"versionType": "git",
"status": "affected"
},
{
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"lessThan": "4f1c20873f70b4b22ef86dc38dad1fda8e169bcd",
"versionType": "git",
"status": "affected"
},
{
"version": "eb36bedf28be6d986bdbcfa375bab08ffa45efd8",
"lessThan": "307d80193b4a4a75b8dc4e0d3162be3755abbed7",
"versionType": "git",
"status": "affected"
},
{
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{
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"versionType": "git",
"status": "affected"
},
{
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"versionType": "git",
"status": "affected"
},
{
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"status": "affected"
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{
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"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"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",
"versions": [
{
"version": "4.11",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.11",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.266",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.217",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.183",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.152",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.104",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.45",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.1.9",
"lessThanOrEqual": "7.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-06T17:00:13.192542Z",
"id": "CVE-2026-74623",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"references": [
{
"url": "https://git.kernel.org/stable/c/307d80193b4a4a75b8dc4e0d3162be3755abbed7",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
"url": "https://git.kernel.org/stable/c/4f1c20873f70b4b22ef86dc38dad1fda8e169bcd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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}