CVE-2025-22049

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-22049", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-29T08:45:45.811Z", "datePublished": "2025-04-16T14:12:08.317Z", "dateUpdated": "2026-08-05T11:56:21.806Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:56:21.806Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: Increase ARCH_DMA_MINALIGN up to 16\n\nARCH_DMA_MINALIGN is 1 by default, but some LoongArch-specific devices\n(such as APBDMA) require 16 bytes alignment. When the data buffer length\nis too small, the hardware may make an error writing cacheline. Thus, it\nis dangerous to allocate a small memory buffer for DMA. It's always safe\nto define ARCH_DMA_MINALIGN as L1_CACHE_BYTES but unnecessary (kmalloc()\nneed small memory objects). Therefore, just increase it to 16."}], "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 path is entered by triggering a DMA transaction on an APBDMA-backed peripheral (I2S/PCM device node, APB slave I/O) from a local syscall/ioctl; no network protocol handler or remote peer data reaches this code. The APBDMA controller drives no network device, so remote or adjacent reach is not defensible.\nAC:L - There is no race and no condition outside the attacker's control \u2014 the 16-byte hardware write granule versus the 8-byte `KMALLOC_MIN_SIZE` mismatch is deterministic on every affected transfer, and the attacker can repeat the I/O arbitrarily while heap-spraying to control which slab object sits adjacent to the undersized `kmalloc-8` buffer.\nPR:L - An unprivileged local account suffices \u2014 opening the sound/APB peripheral device node and starting a transfer requires no capability check, and on the embedded Loongson-2K systems where APBDMA is present these nodes are routinely accessible to ordinary users. No real root in the initial namespace is needed.\nUI:N - The attacker initiates the DMA transfer directly through their own file descriptor; no victim must mount a filesystem, open a file, or take any other action.\nS:U - The APBDMA engine is programmed by trusted in-kernel driver code and the resulting overrun lands in the kernel's own slab heap, so the corruption stays within the kernel's security authority \u2014 no IOMMU, hypervisor, or sandbox boundary is crossed.\nC:H - In the memory\u2192device direction the 16-byte granule reads past the end of the undersized `kmalloc()` object and transmits adjacent kernel heap contents out to the peripheral, and the resulting heap corruption is a general primitive that can be leveraged to disclose kernel memory.\nI:H - In the device\u2192memory direction the hardware writes up to 15 bytes beyond the allocated object, overwriting neighbouring slab objects with device-supplied data \u2014 an out-of-bounds heap write that, combined with groomable `kmalloc-8` neighbours, is exploitable for control-flow-relevant corruption.\nA:H - Silent corruption of adjacent slab objects \u2014 including list pointers and object headers of unrelated allocations \u2014 reliably leads to slab corruption reports, oopses, and kernel panics, and nothing (no bounce buffer, since LoongArch devices are treated as coherent) prevents it from recurring on every transfer."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/loongarch/include/asm/cache.h"], "versions": [{"version": "fa96b57c149061f71a70bd6582d995f6424fbbf4", "lessThan": "f39af67f03b564b763b06e44cb960c10a382d54a", "status": "affected", "versionType": "git"}, {"version": "fa96b57c149061f71a70bd6582d995f6424fbbf4", "lessThan": "279ec25c2df49fba1cd9488f2ddd045d9cb2112e", "status": "affected", "versionType": "git"}, {"version": "fa96b57c149061f71a70bd6582d995f6424fbbf4", "lessThan": "1d0def2d1658666ec1f32c9495df60e7411e3c82", "status": "affected", "versionType": "git"}, {"version": "fa96b57c149061f71a70bd6582d995f6424fbbf4", "lessThan": "bfff341cac7c650e6ca8d10503725992f5564d0f", "status": "affected", "versionType": "git"}, {"version": "fa96b57c149061f71a70bd6582d995f6424fbbf4", "lessThan": "8b82aea3666f8f2c78f86148d78aea99c46e0f82", "status": "affected", "versionType": "git"}, {"version": "fa96b57c149061f71a70bd6582d995f6424fbbf4", "lessThan": "4103cfe9dcb88010ae4911d3ff417457d1b6a720", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/loongarch/include/asm/cache.h"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.134", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.87", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.23", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13.11", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.14.2", "lessThanOrEqual": "6.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15", "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": "5.19", "versionEndExcluding": "6.1.134"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.6.87"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.12.23"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.13.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.14.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.15"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f39af67f03b564b763b06e44cb960c10a382d54a"}, {"url": "https://git.kernel.org/stable/c/279ec25c2df49fba1cd9488f2ddd045d9cb2112e"}, {"url": "https://git.kernel.org/stable/c/1d0def2d1658666ec1f32c9495df60e7411e3c82"}, {"url": "https://git.kernel.org/stable/c/bfff341cac7c650e6ca8d10503725992f5564d0f"}, {"url": "https://git.kernel.org/stable/c/8b82aea3666f8f2c78f86148d78aea99c46e0f82"}, {"url": "https://git.kernel.org/stable/c/4103cfe9dcb88010ae4911d3ff417457d1b6a720"}], "title": "LoongArch: Increase ARCH_DMA_MINALIGN up to 16", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T19:41:31.511Z"}}]}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/loongarch/include/asm/cache.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f39af67f03b564b763b06e44cb960c10a382d54a", "status": "affected", "version": "fa96b57c149061f71a70bd6582d995f6424fbbf4", "versionType": "git"}, {"lessThan": "279ec25c2df49fba1cd9488f2ddd045d9cb2112e", "status": "affected", "version": "fa96b57c149061f71a70bd6582d995f6424fbbf4", "versionType": "git"}, {"lessThan": "1d0def2d1658666ec1f32c9495df60e7411e3c82", "status": "affected", "version": "fa96b57c149061f71a70bd6582d995f6424fbbf4", "versionType": "git"}, {"lessThan": "bfff341cac7c650e6ca8d10503725992f5564d0f", "status": "affected", "version": "fa96b57c149061f71a70bd6582d995f6424fbbf4", "versionType": "git"}, {"lessThan": "8b82aea3666f8f2c78f86148d78aea99c46e0f82", "status": "affected", "version": "fa96b57c149061f71a70bd6582d995f6424fbbf4", "versionType": "git"}, {"lessThan": "4103cfe9dcb88010ae4911d3ff417457d1b6a720", "status": "affected", "version": "fa96b57c149061f71a70bd6582d995f6424fbbf4", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/loongarch/include/asm/cache.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.19"}, {"lessThan": "5.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.134", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.87", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.23", "versionType": "semver"}, {"lessThanOrEqual": "6.13.*", "status": "unaffected", "version": "6.13.11", "versionType": "semver"}, {"lessThanOrEqual": "6.14.*", "status": "unaffected", "version": "6.14.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.15", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B3FC3F9D-5145-4B27-B400-EC6E6B85FC9C", "versionEndExcluding": "6.1.134", "versionStartIncluding": "5.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "EFF24260-49B1-4251-9477-C564CFDAD25B", "versionEndExcluding": "6.6.87", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "26CAB76D-F00F-43CE-BEAD-7097F8FB1D6C", "versionEndExcluding": "6.12.23", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E7E864B0-8C00-4679-BA55-659B4C9C3AD3", "versionEndExcluding": "6.13.11", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FADAE5D8-4808-442C-B218-77B2CE8780A0", "versionEndExcluding": "6.14.2", "versionStartIncluding": "6.14", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: Increase ARCH_DMA_MINALIGN up to 16\n\nARCH_DMA_MINALIGN is 1 by default, but some LoongArch-specific devices\n(such as APBDMA) require 16 bytes alignment. When the data buffer length\nis too small, the hardware may make an error writing cacheline. Thus, it\nis dangerous to allocate a small memory buffer for DMA. It's always safe\nto define ARCH_DMA_MINALIGN as L1_CACHE_BYTES but unnecessary (kmalloc()\nneed small memory objects). Therefore, just increase it to 16."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: LoongArch: Aumentar ARCH_DMA_MINALIGN hasta 16. ARCH_DMA_MINALIGN es 1 por defecto, pero algunos dispositivos espec\u00edficos de LoongArch (como APBDMA) requieren una alineaci\u00f3n de 16 bytes. Cuando la longitud del b\u00fafer de datos es demasiado peque\u00f1a, el hardware puede cometer un error al escribir la l\u00ednea de cach\u00e9. Por lo tanto, es peligroso asignar un b\u00fafer de memoria peque\u00f1o para DMA. Siempre es seguro definir ARCH_DMA_MINALIGN como L1_CACHE_BYTES, pero no es necesario (kmalloc() requiere objetos de memoria peque\u00f1os). Por lo tanto, simplemente aum\u00e9ntelo a 16."}], "id": "CVE-2025-22049", "lastModified": "2026-07-30T06:22:08.990", "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": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-04-16T15:15:58.320", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1d0def2d1658666ec1f32c9495df60e7411e3c82"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/279ec25c2df49fba1cd9488f2ddd045d9cb2112e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4103cfe9dcb88010ae4911d3ff417457d1b6a720"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8b82aea3666f8f2c78f86148d78aea99c46e0f82"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bfff341cac7c650e6ca8d10503725992f5564d0f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f39af67f03b564b763b06e44cb960c10a382d54a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: LoongArch: Increase ARCH_DMA_MINALIGN up to 16", "id": "2360258", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2360258"}, "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:\nLoongArch: Increase ARCH_DMA_MINALIGN up to 16\nARCH_DMA_MINALIGN is 1 by default, but some LoongArch-specific devices\n(such as APBDMA) require 16 bytes alignment. When the data buffer length\nis too small, the hardware may make an error writing cacheline. Thus, it\nis dangerous to allocate a small memory buffer for DMA. It's always safe\nto define ARCH_DMA_MINALIGN as L1_CACHE_BYTES but unnecessary (kmalloc()\nneed small memory objects). Therefore, just increase it to 16."], "name": "CVE-2025-22049", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "2025-04-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-22049\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-22049\nhttps://lore.kernel.org/linux-cve-announce/2025041602-CVE-2025-22049-4f6b@gregkh/T"], "threat_severity": "Low"}

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