276 lines
14 KiB
JSON
276 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-56557",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-12-27T14:03:05.992Z",
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"datePublished": "2024-12-27T14:23:03.251Z",
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"dateUpdated": "2026-08-05T11:45:05.174Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:45:05.174Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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()."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The overflow is reached only through local sysfs writes on the IIO device (`scan_elements/in_voltageN_en` then `buffer/enable`), which drive `iio_enable_buffers()` into `ad7923_update_scan_mode()`. 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 — 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 — enabling scan elements, attaching a trigger, enabling the buffer — 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 — 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 — a repeatable kernel oops or panic."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/iio/adc/ad7923.c"
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],
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"versions": [
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{
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"version": "851644a60d200c9a294de5a5594004bcf13d34c7",
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"lessThan": "6e4d236d9c4b38571c394d3ab6e85dfb71c33ed3",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "851644a60d200c9a294de5a5594004bcf13d34c7",
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"lessThan": "00663d3e000c31d0d49ef86a809f5c107c2d09cd",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "851644a60d200c9a294de5a5594004bcf13d34c7",
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"lessThan": "e5cac32721997cb8bcb208a29f4598b3faf46338",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "851644a60d200c9a294de5a5594004bcf13d34c7",
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"lessThan": "218ecc35949129171ca39bcc0d407c8dc4cd0bbc",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "851644a60d200c9a294de5a5594004bcf13d34c7",
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"lessThan": "3a4187ec454e19903fd15f6e1825a4b84e59a4cd",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/iio/adc/ad7923.c"
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],
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"versions": [
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{
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"version": "5.6",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.6",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.203",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.120",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.64",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.4",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.13",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.6",
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"versionEndExcluding": "5.15.203"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.6",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.6",
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"versionEndExcluding": "6.12.4"
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.6",
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"versionEndExcluding": "6.13"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/6e4d236d9c4b38571c394d3ab6e85dfb71c33ed3"
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},
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{
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"url": "https://git.kernel.org/stable/c/00663d3e000c31d0d49ef86a809f5c107c2d09cd"
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},
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{
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"url": "https://git.kernel.org/stable/c/e5cac32721997cb8bcb208a29f4598b3faf46338"
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},
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{
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"url": "https://git.kernel.org/stable/c/218ecc35949129171ca39bcc0d407c8dc4cd0bbc"
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},
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{
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"url": "https://git.kernel.org/stable/c/3a4187ec454e19903fd15f6e1825a4b84e59a4cd"
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}
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],
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"title": "iio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 5.5,
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "NONE"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2024-56557",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2025-02-18T16:03:56.635182Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-120",
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"description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2025-02-18T16:06:09.556Z"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T20:49:26.305Z"
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}
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}
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]
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}
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} |