FKIE_CVE-2026-72489
Vulnerability from fkie_nvd - Published: 2026-08-15 06:22 - Updated: 2026-08-17 06:19
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
staging: nvec: fix use-after-free in nvec_rx_completed()
In nvec_rx_completed(), when an incomplete RX transfer is detected,
nvec_msg_free() is called to return the message back to the pool by
clearing its 'used' atomic flag. Immediately after this, the code
accesses nvec->rx->data[0] to check the message type.
Since nvec_msg_free() marks the pool slot as available via atomic_set(),
any concurrent or subsequent call to nvec_msg_alloc() could claim that
same slot and overwrite its data[] array. Reading nvec->rx->data[0] after
freeing the message is therefore a use-after-free.
Fix this by saving the message type byte before calling nvec_msg_free(),
then using the saved value for the battery quirk check.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/staging/nvec/nvec.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "6b2ea886ebdae44a2394029844a4e78f58e1587d",
"status": "affected",
"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
"versionType": "git"
},
{
"lessThan": "a37625c7b688fcf68a54263528eccbabfd7fa17a",
"status": "affected",
"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
"versionType": "git"
},
{
"lessThan": "9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89",
"status": "affected",
"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
"versionType": "git"
},
{
"lessThan": "08626fcfe12308ca3f8b22c538ba7dee0b2dce7a",
"status": "affected",
"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
"versionType": "git"
},
{
"lessThan": "f19a5bc059051143c489dd6f79a0f9c3bfd13aea",
"status": "affected",
"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
"versionType": "git"
},
{
"lessThan": "bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90",
"status": "affected",
"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
"versionType": "git"
},
{
"lessThan": "5de04caa46b635e180cecbd164e333eca535db94",
"status": "affected",
"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
"versionType": "git"
},
{
"lessThan": "26813881181deb3a32fbb59eadb2599cbe8423f6",
"status": "affected",
"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/staging/nvec/nvec.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.2"
},
{
"lessThan": "3.2",
"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\nstaging: nvec: fix use-after-free in nvec_rx_completed()\n\nIn nvec_rx_completed(), when an incomplete RX transfer is detected,\nnvec_msg_free() is called to return the message back to the pool by\nclearing its \u0027used\u0027 atomic flag. Immediately after this, the code\naccesses nvec-\u003erx-\u003edata[0] to check the message type.\n\nSince nvec_msg_free() marks the pool slot as available via atomic_set(),\nany concurrent or subsequent call to nvec_msg_alloc() could claim that\nsame slot and overwrite its data[] array. Reading nvec-\u003erx-\u003edata[0] after\nfreeing the message is therefore a use-after-free.\n\nFix this by saving the message type byte before calling nvec_msg_free(),\nthen using the saved value for the battery quirk check."
}
],
"id": "CVE-2026-72489",
"lastModified": "2026-08-17T06:19:17.150",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.5,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
]
},
"published": "2026-08-15T06:22:23.190",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/08626fcfe12308ca3f8b22c538ba7dee0b2dce7a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/26813881181deb3a32fbb59eadb2599cbe8423f6"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/5de04caa46b635e180cecbd164e333eca535db94"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/6b2ea886ebdae44a2394029844a4e78f58e1587d"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/a37625c7b688fcf68a54263528eccbabfd7fa17a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/f19a5bc059051143c489dd6f79a0f9c3bfd13aea"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
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Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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