CVE-2024-56557

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No remote or adjacent network data reaches this code, and no physical access to the board is required.\nAC:L - The attacker fully controls the trigger \u2014 enabling five or more scan elements on an ad7908/ad7918/ad7928 and starting the buffer deterministically overflows `tx_buf` and `ring_xfer` on the first attempt, with no race to win and no state the attacker cannot set.\nPR:L - Nothing on the path checks any capability; only sysfs file permissions gate it, and on the embedded/industrial/Android systems where these SPI ADCs are deployed the IIO nodes are routinely handed to a non-root sensor or data-acquisition user or group by udev/ueventd rules. This matches the established scoring of the other IIO triggered-buffer CVEs reachable through the same interface.\nUI:N - The attacker performs the entire sequence \u2014 enabling scan elements, attaching a trigger, enabling the buffer \u2014 from their own process, and no other user needs to act.\nS:U - The corruption is confined to kernel heap memory managed by the same kernel that contains the flaw, with no crossing of a hypervisor, IOMMU, or other security-authority boundary.\nC:H - The overflow overwrites `spi_message`/`spi_transfer` fields, so `spi_sync()` walks a corrupted transfer list and honors `tx_buf`/`rx_buf`/`len` values taken from smashed memory, and the resulting heap corruption is a general primitive that can be groomed into arbitrary kernel-memory disclosure.\nI:H - This is an out-of-bounds heap write of hundreds of bytes past `ring_xfer[4]`, including pointer values, that also clobbers `ring_msg.transfers.prev` mid-construction so `list_add_tail()` writes kernel pointers through an attacker-influenced address \u2014 a classic corruption-to-control-flow path.\nA:H - The clobbered `spi_message` list is immediately traversed by `spi_sync()` in `ad7923_trigger_handler()`, dereferencing wild `transfer_list` links, and the write past the end of the `iio_priv()` allocation corrupts adjacent slab state \u2014 a repeatable kernel oops or panic."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iio/adc/ad7923.c"], "versions": [{"version": "851644a60d200c9a294de5a5594004bcf13d34c7", "lessThan": "6e4d236d9c4b38571c394d3ab6e85dfb71c33ed3", "status": "affected", "versionType": "git"}, {"version": "851644a60d200c9a294de5a5594004bcf13d34c7", "lessThan": "00663d3e000c31d0d49ef86a809f5c107c2d09cd", "status": "affected", "versionType": "git"}, {"version": "851644a60d200c9a294de5a5594004bcf13d34c7", "lessThan": "e5cac32721997cb8bcb208a29f4598b3faf46338", "status": "affected", "versionType": "git"}, {"version": "851644a60d200c9a294de5a5594004bcf13d34c7", "lessThan": "218ecc35949129171ca39bcc0d407c8dc4cd0bbc", "status": "affected", "versionType": "git"}, {"version": "851644a60d200c9a294de5a5594004bcf13d34c7", "lessThan": "3a4187ec454e19903fd15f6e1825a4b84e59a4cd", "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/iio/adc/ad7923.c"], "versions": [{"version": "5.6", "status": "affected"}, {"version": "0", "lessThan": "5.6", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.120", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.64", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.4", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13", "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": "5.6", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.1.120"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.6.64"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.12.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6e4d236d9c4b38571c394d3ab6e85dfb71c33ed3"}, {"url": "https://git.kernel.org/stable/c/00663d3e000c31d0d49ef86a809f5c107c2d09cd"}, {"url": "https://git.kernel.org/stable/c/e5cac32721997cb8bcb208a29f4598b3faf46338"}, {"url": "https://git.kernel.org/stable/c/218ecc35949129171ca39bcc0d407c8dc4cd0bbc"}, {"url": "https://git.kernel.org/stable/c/3a4187ec454e19903fd15f6e1825a4b84e59a4cd"}], "title": "iio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2024-56557", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-02-18T16:03:56.635182Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-120", "description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-18T16:06:09.556Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:49:26.305Z"}}]}}

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No remote or adjacent network data reaches this code, and no physical access to the board is required.\nAC:L - The attacker fully controls the trigger \u2014 enabling five or more scan elements on an ad7908/ad7918/ad7928 and starting the buffer deterministically overflows `tx_buf` and `ring_xfer` on the first attempt, with no race to win and no state the attacker cannot set.\nPR:L - Nothing on the path checks any capability; only sysfs file permissions gate it, and on the embedded/industrial/Android systems where these SPI ADCs are deployed the IIO nodes are routinely handed to a non-root sensor or data-acquisition user or group by udev/ueventd rules. This matches the established scoring of the other IIO triggered-buffer CVEs reachable through the same interface.\nUI:N - The attacker performs the entire sequence \u2014 enabling scan elements, attaching a trigger, enabling the buffer \u2014 from their own process, and no other user needs to act.\nS:U - The corruption is confined to kernel heap memory managed by the same kernel that contains the flaw, with no crossing of a hypervisor, IOMMU, or other security-authority boundary.\nC:H - The overflow overwrites `spi_message`/`spi_transfer` fields, so `spi_sync()` walks a corrupted transfer list and honors `tx_buf`/`rx_buf`/`len` values taken from smashed memory, and the resulting heap corruption is a general primitive that can be groomed into arbitrary kernel-memory disclosure.\nI:H - This is an out-of-bounds heap write of hundreds of bytes past `ring_xfer[4]`, including pointer values, that also clobbers `ring_msg.transfers.prev` mid-construction so `list_add_tail()` writes kernel pointers through an attacker-influenced address \u2014 a classic corruption-to-control-flow path.\nA:H - The clobbered `spi_message` list is immediately traversed by `spi_sync()` in `ad7923_trigger_handler()`, dereferencing wild `transfer_list` links, and the write past the end of the `iio_priv()` allocation corrupts adjacent slab state \u2014 a repeatable kernel oops or panic."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "851644a60d200c9a294de5a5594004bcf13d34c7", "lessThan": "6e4d236d9c4b38571c394d3ab6e85dfb71c33ed3", "versionType": "git"}, {"status": "affected", "version": "851644a60d200c9a294de5a5594004bcf13d34c7", "lessThan": "00663d3e000c31d0d49ef86a809f5c107c2d09cd", "versionType": "git"}, {"status": "affected", "version": "851644a60d200c9a294de5a5594004bcf13d34c7", "lessThan": "e5cac32721997cb8bcb208a29f4598b3faf46338", "versionType": "git"}, {"status": "affected", "version": "851644a60d200c9a294de5a5594004bcf13d34c7", "lessThan": "218ecc35949129171ca39bcc0d407c8dc4cd0bbc", "versionType": "git"}, {"status": "affected", "version": "851644a60d200c9a294de5a5594004bcf13d34c7", "lessThan": "3a4187ec454e19903fd15f6e1825a4b84e59a4cd", "versionType": "git"}], "programFiles": ["drivers/iio/adc/ad7923.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.6"}, {"status": "unaffected", "version": "0", "lessThan": "5.6", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.203", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.120", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.64", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.4", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.13", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/iio/adc/ad7923.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/6e4d236d9c4b38571c394d3ab6e85dfb71c33ed3"}, {"url": "https://git.kernel.org/stable/c/00663d3e000c31d0d49ef86a809f5c107c2d09cd"}, {"url": "https://git.kernel.org/stable/c/e5cac32721997cb8bcb208a29f4598b3faf46338"}, {"url": "https://git.kernel.org/stable/c/218ecc35949129171ca39bcc0d407c8dc4cd0bbc"}, {"url": "https://git.kernel.org/stable/c/3a4187ec454e19903fd15f6e1825a4b84e59a4cd"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer\n\nThe AD7923 was updated to support devices with 8 channels, but the size\nof tx_buf and ring_xfer was not increased accordingly, leading to a\npotential buffer overflow in ad7923_update_scan_mode()."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.203", "versionStartIncluding": "5.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.120", "versionStartIncluding": "5.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.64", "versionStartIncluding": "5.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.4", "versionStartIncluding": "5.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.13", "versionStartIncluding": "5.6"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:45:05.174Z"}}}, "cveMetadata": {"cveId": "CVE-2024-56557", "state": "PUBLISHED", "dateUpdated": "2026-08-05T11:45:05.174Z", "dateReserved": "2024-12-27T14:03:05.992Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-12-27T14:23:03.251Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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overflow in ad7923_update_scan_mode()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iio: adc: ad7923: Se corrige el desbordamiento de b\u00fafer para tx_buf y ring_xfer El AD7923 se actualiz\u00f3 para soportar dispositivos con 8 canales, pero el tama\u00f1o de tx_buf y ring_xfer no se increment\u00f3 en consecuencia, lo que provoc\u00f3 un posible desbordamiento de b\u00fafer en ad7923_update_scan_mode()."}], "id": "CVE-2024-56557", "lastModified": "2026-08-04T11:22:10.727", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-56557", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-02-18T16:03:56.635182Z", "version": "2.0.3"}}]}, "published": "2024-12-27T15:15:14.520", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": 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"134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: iio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer", "id": "2334466", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2334466"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\niio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer\nThe AD7923 was updated to support devices with 8 channels, but the size\nof tx_buf and ring_xfer was not increased accordingly, leading to a\npotential buffer overflow in ad7923_update_scan_mode()."], "name": "CVE-2024-56557", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-12-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-56557\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-56557\nhttps://lore.kernel.org/linux-cve-announce/2024122711-CVE-2024-56557-7440@gregkh/T"], "threat_severity": "Moderate"}

{}