248 lines
12 KiB
JSON
248 lines
12 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-2021-47048",
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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": "2024-02-27T18:42:55.970Z",
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"datePublished": "2024-02-28T08:13:51.551Z",
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"dateUpdated": "2026-08-05T08:45:43.114Z"
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},
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"dateUpdated": "2026-08-05T08:45:43.114Z"
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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\nspi: spi-zynqmp-gqspi: fix use-after-free in zynqmp_qspi_exec_op\n\nWhen handling op->addr, it is using the buffer \"tmpbuf\" which has been\nfreed. This will trigger a use-after-free KASAN warning. Let's use\ntemporary variables to store op->addr.val and op->cmd.opcode to fix\nthis issue."
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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 vulnerable code is in the Xilinx ZynqMP GQSPI controller's spi-mem exec_op path, reached only via local syscalls that perform SPI NOR/MTD flash operations (e.g., reading /dev/mtd* or files on a SPI-NOR-backed filesystem), not via network packets or physical plug-in buses.\nAC:L - Any SPI memory operation with both a command and address (the common case for flash reads/writes/erases) reliably frees tmpbuf then immediately reuses xqspi->txbuf pointing at that freed buffer; no race or attacker-uncontrollable condition is required.\nPR:L - On realistic ZynqMP embedded deployments, QSPI flash is commonly mounted or otherwise readable by unprivileged local users (SPI-NOR-backed filesystems, relaxed /dev/mtd permissions), so basic user privileges suffice to trigger exec_op without requiring real root.\nUI:N - The attacker triggers the UAF solely through their own flash/filesystem accesses; no separate victim action is needed.\nS:U - This is standard kernel memory corruption within the host kernel's security authority and does not cross a VM, IOMMU, or other security boundary.\nC:H - Use-after-free of the kmalloc'd tmpbuf allows reclaim and control of the freed object contents, which per kernel CVSS guidance enables arbitrary information disclosure.\nI:H - The UAF writes attacker-influenced address bytes into freed slab memory that is subsequently consumed by filltxfifo, enabling heap corruption and potential control-flow hijacking primitives.\nA:H - Use-after-free in this kernel driver path can cause kernel oops/panic or otherwise crash the system when the freed buffer is corrupted or reused."
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}
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]
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}
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],
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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/spi/spi-zynqmp-gqspi.c"
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],
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{
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"drivers/spi/spi-zynqmp-gqspi.c"
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],
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"versions": [
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{
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"version": "5.10",
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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": "5.10",
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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": "5.10.37",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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},
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{
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"version": "5.11.21",
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"lessThanOrEqual": "5.11.*",
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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": "5.12.4",
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"lessThanOrEqual": "5.12.*",
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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": "5.13",
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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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"title": "spi: spi-zynqmp-gqspi: fix use-after-free in zynqmp_qspi_exec_op",
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"id": "CVE-2021-47048",
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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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