{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47048", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-27T18:42:55.970Z", "datePublished": "2024-02-28T08:13:51.551Z", "dateUpdated": "2026-08-05T08:45:43.114Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:45:43.114Z" }, "descriptions": [ { "lang": "en", "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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/spi/spi-zynqmp-gqspi.c" ], "versions": [ { "version": "1c26372e5aa9e53391a1f8fe0dc7cd93a7e5ba9e", "lessThan": "1231279389b5e638bc3b66b9741c94077aed4b5a", "status": "affected", "versionType": "git" }, { "version": "1c26372e5aa9e53391a1f8fe0dc7cd93a7e5ba9e", "lessThan": "d67e0d6bd92ebbb0294e7062bbf5cdc773764e62", "status": "affected", "versionType": "git" }, { "version": "1c26372e5aa9e53391a1f8fe0dc7cd93a7e5ba9e", "lessThan": "23269ac9f123eca3aea7682d3345c02e71ed696c", "status": "affected", "versionType": "git" }, { "version": "1c26372e5aa9e53391a1f8fe0dc7cd93a7e5ba9e", "lessThan": "a2c5bedb2d55dd27c642c7b9fb6886d7ad7bdb58", "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/spi/spi-zynqmp-gqspi.c" ], "versions": [ { "version": "5.10", "status": "affected" }, { "version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.37", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.11.21", "lessThanOrEqual": "5.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.12.4", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.13", "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": "5.10", "versionEndExcluding": "5.10.37" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.11.21" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.12.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/1231279389b5e638bc3b66b9741c94077aed4b5a" }, { "url": "https://git.kernel.org/stable/c/d67e0d6bd92ebbb0294e7062bbf5cdc773764e62" }, { "url": "https://git.kernel.org/stable/c/23269ac9f123eca3aea7682d3345c02e71ed696c" }, { "url": "https://git.kernel.org/stable/c/a2c5bedb2d55dd27c642c7b9fb6886d7ad7bdb58" } ], "title": "spi: spi-zynqmp-gqspi: fix use-after-free in zynqmp_qspi_exec_op", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.431Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/1231279389b5e638bc3b66b9741c94077aed4b5a", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/d67e0d6bd92ebbb0294e7062bbf5cdc773764e62", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/23269ac9f123eca3aea7682d3345c02e71ed696c", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/a2c5bedb2d55dd27c642c7b9fb6886d7ad7bdb58", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2021-47048", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T15:57:41.551730Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:55.958Z" } } ] } }