CVE-2026-72489

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72489", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.936Z", "datePublished": "2026-08-15T05:57:24.948Z", "dateUpdated": "2026-08-17T05:44:51.131Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:44:51.131Z"}, "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 'used' atomic flag. Immediately after this, the code\naccesses nvec->rx->data[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->rx->data[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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The flaw is hit in the I2C slave IRQ handler when the embedded controller ends an RX transfer early; on affected Tegra20 PAZ00 netbooks a local actor can reach it by stressing EC traffic via kernel battery polling and userspace sysfs/input subdrivers (LED, keyboard) that call nvec_write_async().\nAC:L - This is a use-after-free where nvec_msg_free() returns the RX pool slot and the handler immediately re-reads nvec->rx->data[0]; on SMP an attacker can provoke incomplete NVEC_BAT responses while concurrent I2C IRQs call nvec_msg_alloc(), controlling both sides of the slot-reuse race.\nPR:N - No elevated privileges are needed because the nvec-power delayed worker automatically issues NVEC_BAT requests every five seconds at boot, and documented incomplete EC battery responses can reach the vulnerable IRQ path before any user authentication or special capabilities.\nUI:N - Exploitation does not require victim interaction; kernel background battery and AC polling plus EC-initiated incomplete transfers can invoke nvec_rx_completed() without the user mounting filesystems, opening files, or performing other deliberate actions.\nS:U - Impact is confined to kernel memory and privileges on the same Tegra SoC running the driver; this is not a VM escape, hypervisor breakout, or other cross-security-authority boundary violation.\nC:H - Reading nvec->rx->data[0] after nvec_msg_free() is a use-after-free on a msg_pool slot where concurrent nvec_msg_alloc() can overwrite data[], yielding attacker-influenced kernel memory reads and potential disclosure of pointers or adjacent structure contents.\nI:H - Use-after-free on reusable nvec_msg pool entries can be leveraged for controlled reuse of freed message buffers, enabling heap-style corruption primitives that may lead to arbitrary kernel memory writes and privilege escalation or code execution.\nA:H - The post-free read can mis-handle ec_transfer completion and corrupt IRQ-time state; use-after-free in hardirq context can kernel oops or panic the system, consistent with the original battery-quirk crash this code path was introduced to mitigate."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/staging/nvec/nvec.c"], "versions": [{"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721", "lessThan": "6b2ea886ebdae44a2394029844a4e78f58e1587d", "status": "affected", "versionType": "git"}, {"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721", "lessThan": "a37625c7b688fcf68a54263528eccbabfd7fa17a", "status": "affected", "versionType": "git"}, {"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721", "lessThan": "9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89", "status": "affected", "versionType": "git"}, {"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721", "lessThan": "08626fcfe12308ca3f8b22c538ba7dee0b2dce7a", "status": "affected", "versionType": "git"}, {"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721", "lessThan": "f19a5bc059051143c489dd6f79a0f9c3bfd13aea", "status": "affected", "versionType": "git"}, {"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721", "lessThan": "bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90", "status": "affected", "versionType": "git"}, {"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721", "lessThan": "5de04caa46b635e180cecbd164e333eca535db94", "status": "affected", "versionType": "git"}, {"version": "d6bdcf2e1019351cbc176e963b7756766bdd8721", "lessThan": "26813881181deb3a32fbb59eadb2599cbe8423f6", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/staging/nvec/nvec.c"], "versions": [{"version": "3.2", "status": "affected"}, {"version": "0", "lessThan": "3.2", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6b2ea886ebdae44a2394029844a4e78f58e1587d"}, {"url": "https://git.kernel.org/stable/c/a37625c7b688fcf68a54263528eccbabfd7fa17a"}, {"url": "https://git.kernel.org/stable/c/9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89"}, {"url": "https://git.kernel.org/stable/c/08626fcfe12308ca3f8b22c538ba7dee0b2dce7a"}, {"url": "https://git.kernel.org/stable/c/f19a5bc059051143c489dd6f79a0f9c3bfd13aea"}, {"url": "https://git.kernel.org/stable/c/bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90"}, {"url": "https://git.kernel.org/stable/c/5de04caa46b635e180cecbd164e333eca535db94"}, {"url": "https://git.kernel.org/stable/c/26813881181deb3a32fbb59eadb2599cbe8423f6"}], "title": "staging: nvec: fix use-after-free in nvec_rx_completed()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"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 'used' atomic flag. Immediately after this, the code\naccesses nvec->rx->data[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->rx->data[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"}

{"bugzilla": {"description": "kernel: staging: nvec: fix use-after-free in nvec_rx_completed()", "id": "2516528", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516528"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nstaging: nvec: fix use-after-free in nvec_rx_completed()\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 'used' atomic flag. Immediately after this, the code\naccesses nvec->rx->data[0] to check the message type.\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->rx->data[0] after\nfreeing the message is therefore a use-after-free.\nFix this by saving the message type byte before calling nvec_msg_free(),\nthen using the saved value for the battery quirk check.", "A flaw was found in the Linux kernel's `nvec` driver. An incomplete receive (RX) transfer in the `nvec_rx_completed()` function can lead to a use-after-free vulnerability. This occurs because memory is freed and then immediately accessed, allowing a concurrent memory allocation to overwrite the freed data. An attacker could potentially exploit this to cause memory corruption, leading to a denial of service or possibly privilege escalation."], "name": "CVE-2026-72489", "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72489\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72489\nhttps://lore.kernel.org/linux-cve-announce/2026081538-CVE-2026-72489-64a2@gregkh/T"], "threat_severity": "Moderate"}

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