FKIE_CVE-2026-72048
Vulnerability from fkie_nvd - Published: 2026-08-15 06:21 - Updated: 2026-08-17 06:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
ieee802154: ca8210: fix cas_ctl leak on spi_async failure
ca8210_spi_transfer() allocates cas_ctl with kzalloc_obj(GFP_ATOMIC)
and relies entirely on the SPI completion callback
ca8210_spi_transfer_complete() to free it.
The spi_async() API only invokes the completion callback on successful
submission. On failure it returns a negative error code without ever
queuing the callback, which leaves cas_ctl and its embedded spi_message
and spi_transfer orphaned. Every kfree(cas_ctl) in the driver is
inside the completion callback, so there is no other reclamation path.
ca8210_spi_transfer() is called from ca8210_spi_exchange(), the
interrupt handler ca8210_interrupt_handler(), and from the retry path
inside the completion callback itself. The exchange and interrupt
handler paths loop on -EBUSY, so under sustained SPI bus contention
every retry iteration leaks a fresh cas_ctl (~600 bytes per
occurrence).
Fix it by freeing cas_ctl on the spi_async() error path. While here,
correct the misleading error string: the function calls spi_async(),
not spi_sync().
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/ieee802154/ca8210.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "460c5cd51e4d7d15b317f178f42cfcb666c0fe91",
"status": "affected",
"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
"versionType": "git"
},
{
"lessThan": "b07aea90dbc6e188c74c100af64b77b9482ffc65",
"status": "affected",
"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
"versionType": "git"
},
{
"lessThan": "fe90605b651573d30be8293ff5be40e3d7023117",
"status": "affected",
"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
"versionType": "git"
},
{
"lessThan": "b9071dc7889bef42590e04fbf3e56cc65e1e5e6e",
"status": "affected",
"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
"versionType": "git"
},
{
"lessThan": "d4a397fe803c2d157f6ebb068b802ef75fbf109e",
"status": "affected",
"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
"versionType": "git"
},
{
"lessThan": "cb5cca1d2a908ddd5e357971de0f2009617b8d6a",
"status": "affected",
"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
"versionType": "git"
},
{
"lessThan": "7e3630fbb6aabb844bbf35746dee0bf3894100c7",
"status": "affected",
"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
"versionType": "git"
},
{
"lessThan": "e09390e439bd7cca30dd10893b1f64802961667a",
"status": "affected",
"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/ieee802154/ca8210.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"lessThan": "4.12",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: ca8210: fix cas_ctl leak on spi_async failure\n\nca8210_spi_transfer() allocates cas_ctl with kzalloc_obj(GFP_ATOMIC)\nand relies entirely on the SPI completion callback\nca8210_spi_transfer_complete() to free it.\n\nThe spi_async() API only invokes the completion callback on successful\nsubmission. On failure it returns a negative error code without ever\nqueuing the callback, which leaves cas_ctl and its embedded spi_message\nand spi_transfer orphaned. Every kfree(cas_ctl) in the driver is\ninside the completion callback, so there is no other reclamation path.\n\nca8210_spi_transfer() is called from ca8210_spi_exchange(), the\ninterrupt handler ca8210_interrupt_handler(), and from the retry path\ninside the completion callback itself. The exchange and interrupt\nhandler paths loop on -EBUSY, so under sustained SPI bus contention\nevery retry iteration leaks a fresh cas_ctl (~600 bytes per\noccurrence).\n\nFix it by freeing cas_ctl on the spi_async() error path. While here,\ncorrect the misleading error string: the function calls spi_async(),\nnot spi_sync()."
}
],
"id": "CVE-2026-72048",
"lastModified": "2026-08-17T06:18:02.860",
"metrics": {},
"published": "2026-08-15T06:21:14.050",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/460c5cd51e4d7d15b317f178f42cfcb666c0fe91"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/7e3630fbb6aabb844bbf35746dee0bf3894100c7"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b07aea90dbc6e188c74c100af64b77b9482ffc65"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b9071dc7889bef42590e04fbf3e56cc65e1e5e6e"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/cb5cca1d2a908ddd5e357971de0f2009617b8d6a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/d4a397fe803c2d157f6ebb068b802ef75fbf109e"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/e09390e439bd7cca30dd10893b1f64802961667a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/fe90605b651573d30be8293ff5be40e3d7023117"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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