CVE-2025-38653

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There is no network-facing path to proc_reg_open().\nAC:L - The attacker fully controls their side of the race and can spin unbounded threads on open(), while widening the lookup-to-open window with memory pressure since proc_get_inode() allocates GFP_KERNEL; on Android/embedded targets the module-teardown side is also reachable by toggling user-facing device state (WiFi/BT/camera), so the race can be provoked at will.\nPR:L - Any unprivileged local user can open a world-readable module-created /proc entry (e.g. /proc/net/*, /proc/scsi/*, /proc/driver/*); the unguarded dereference happens before any capability or use_pde() gate.\nUI:N - The attacker's own open() performs the faulty dereference; no victim needs to open a file, mount a filesystem, or otherwise interact.\nS:U - The use-after-free occurs in kernel memory and its impact stays within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a use-after-free read of freed module memory through a dangling pde->proc_ops pointer, and freed-region contents that an attacker can groom (by triggering module loads that recycle the region) are consumed by the kernel and leak back through the resulting FMODE_LSEEK state.\nI:H - Use-after-free of a function-pointer table entry means kernel control-flow-relevant data is read from memory whose contents an attacker may influence via heap/module-region grooming, and such UAF conditions are treated as exploitable for corruption of kernel state.\nA:H - The dereference targets vmalloc-backed module memory that is unmapped on free, producing the same kernel page-fault oops documented in the companion fix 654b33ada4ab; the crash can be retriggered on every module unload."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3f61631d47f115b83c935d0039f95cb68b0c8ab7", "lessThan": "c35b0feb80b48720dfbbf4e33759c7be3faaebb6", "versionType": "git"}, {"status": "affected", "version": "3f61631d47f115b83c935d0039f95cb68b0c8ab7", "lessThan": "33c778ea0bd0fa62ff590497e72562ff90f82b13", "versionType": "git"}, {"status": "affected", "version": "3f61631d47f115b83c935d0039f95cb68b0c8ab7", "lessThan": "fc1072d934f687e1221d685cf1a49a5068318f34", "versionType": "git"}, {"status": "affected", "version": "3f61631d47f115b83c935d0039f95cb68b0c8ab7", "lessThan": "d136502e04d8853a9aecb335d07bbefd7a1519a8", "versionType": "git"}, {"status": "affected", "version": "3f61631d47f115b83c935d0039f95cb68b0c8ab7", "lessThan": "1fccbfbae1dd36198dc47feac696563244ad81d3", "versionType": "git"}, {"status": "affected", "version": "3f61631d47f115b83c935d0039f95cb68b0c8ab7", "lessThan": "ff7ec8dc1b646296f8d94c39339e8d3833d16c05", "versionType": "git"}], "programFiles": ["fs/proc/generic.c", "fs/proc/inode.c", "fs/proc/internal.h", "include/linux/proc_fs.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"status": "unaffected", "version": "0", "lessThan": "6.0", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.148", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.102", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.42", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.15.10", "versionType": "semver", "lessThanOrEqual": "6.15.*"}, {"status": "unaffected", "version": "6.16.1", "versionType": "semver", "lessThanOrEqual": "6.16.*"}, {"status": "unaffected", "version": "6.17", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/proc/generic.c", "fs/proc/inode.c", "fs/proc/internal.h", "include/linux/proc_fs.h"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/c35b0feb80b48720dfbbf4e33759c7be3faaebb6"}, {"url": "https://git.kernel.org/stable/c/33c778ea0bd0fa62ff590497e72562ff90f82b13"}, {"url": "https://git.kernel.org/stable/c/fc1072d934f687e1221d685cf1a49a5068318f34"}, {"url": "https://git.kernel.org/stable/c/d136502e04d8853a9aecb335d07bbefd7a1519a8"}, {"url": "https://git.kernel.org/stable/c/1fccbfbae1dd36198dc47feac696563244ad81d3"}, {"url": "https://git.kernel.org/stable/c/ff7ec8dc1b646296f8d94c39339e8d3833d16c05"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nproc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al\n\nCheck pde->proc_ops->proc_lseek directly may cause UAF in rmmod scenario. \nIt's a gap in proc_reg_open() after commit 654b33ada4ab(\"proc: fix UAF in\nproc_get_inode()\"). 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Followed by AI Viro's suggestion, fix it in same\nmanner."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: proc: usar el mismo tratamiento para verificar proc_lseek que para proc_read_iter, etc. Verificar pde->proc_ops->proc_lseek directamente puede causar UAF en el escenario rmmod. Se trata de una falla en proc_reg_open() despu\u00e9s del commit 654b33ada4ab(\"proc: fix UAF in proc_get_inode()\"). Siguiendo la sugerencia de AI Viro, se debe corregir de la misma manera."}], "id": "CVE-2025-38653", "lastModified": "2026-10-15T22:18:48.283", "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": 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": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-38653", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T21:52:33.974693Z", "version": "2.0.3"}}]}, "published": "2025-08-22T16:15:40.200", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1fccbfbae1dd36198dc47feac696563244ad81d3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/33c778ea0bd0fa62ff590497e72562ff90f82b13"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c35b0feb80b48720dfbbf4e33759c7be3faaebb6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d136502e04d8853a9aecb335d07bbefd7a1519a8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fc1072d934f687e1221d685cf1a49a5068318f34"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ff7ec8dc1b646296f8d94c39339e8d3833d16c05"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al", "id": "2390372", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2390372"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nproc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al\nCheck pde->proc_ops->proc_lseek directly may cause UAF in rmmod scenario. \nIt's a gap in proc_reg_open() after commit 654b33ada4ab(\"proc: fix UAF in\nproc_get_inode()\"). Followed by AI Viro's suggestion, fix it in same\nmanner."], "name": "CVE-2025-38653", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-08-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38653\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38653\nhttps://lore.kernel.org/linux-cve-announce/2025082238-CVE-2025-38653-35ba@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-08-23T10:55:10.643808+00:00", "updated": "2025-08-23T10:55:10.643920+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}