{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-53148", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-11-19T17:17:24.998Z", "datePublished": "2024-12-24T11:28:48.619Z", "dateUpdated": "2026-08-05T11:44:10.150Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:44:10.150Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: Flush partial mappings in error case\n\nIf some remap_pfn_range() calls succeeded before one failed, we still have\nbuffer pages mapped into the userspace page tables when we drop the buffer\nreference with comedi_buf_map_put(bm). The userspace mappings are only\ncleaned up later in the mmap error path.\n\nFix it by explicitly flushing all mappings in our VMA on the error path.\n\nSee commit 79a61cc3fc04 (\"mm: avoid leaving partial pfn mappings around in\nerror case\")." } ], "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 vulnerability is reached only via mmap(2) on a local comedi character device node (/dev/comediN); there is no network or physical-bus interface involved.\nAC:L - The attacker controls both sides of the condition — inducing the partial remap_pfn_range failure via memory pressure and racing a concurrent buffer free (BUFCONFIG/detach) — so per the UAF/attacker-controlled-race guidance this is Low.\nPR:L - Once a driver is attached (a common one-time privileged setup), an unprivileged local user with access to the device node can allocate a buffer and mmap it without any capability; the vulnerable comedi_mmap and buffer-resize paths have no CAP check.\nUI:N - The attacker performs the open, buffer allocation, and mmap entirely on their own; no victim action is required.\nS:U - The corruption stays within the kernel's own security authority (kernel-managed memory); no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The dangling userspace PTEs point at physical pages that are freed and reallocated to arbitrary kernel or other-process uses, giving the attacker a read primitive over reused memory.\nI:H - The stale mappings are writable (PAGE_SHARED), so userspace can write into freed/reallocated physical pages — an arbitrary write primitive suitable for privilege escalation.\nA:H - Dangling PTEs to reused physical pages readily corrupt kernel memory, causing oopses/panics and system instability." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/comedi/comedi_fops.c" ], "versions": [ { "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4", "lessThan": "57f048c2d205b85e34282a9b0b0ae177e84c2f44", "status": "affected", "versionType": "git" }, { "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4", "lessThan": "b9322408d83accc8b96322bc7356593206288c56", "status": "affected", "versionType": "git" }, { "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4", "lessThan": "8797b7712de704dc231f9e821d8eb3b9aeb3a032", "status": "affected", "versionType": "git" }, { "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4", "lessThan": "16c507df509113c037cdc0ba642b9ab3389bd26c", "status": "affected", "versionType": "git" }, { "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4", "lessThan": "9b07fb464eb69a752406e78e62ab3a60bfa7b00d", "status": "affected", "versionType": "git" }, { "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4", "lessThan": "c6963a06ce5c61d3238751ada04ee1569663a828", "status": "affected", "versionType": "git" }, { "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4", "lessThan": "297f14fbb81895f4ccdb0ad25d196786d6461e00", "status": "affected", "versionType": "git" }, { "version": "ed9eccbe8970f6eedc1b978c157caf1251a896d4", "lessThan": "ce8f9fb651fac95dd41f69afe54d935420b945bd", "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/comedi/comedi_fops.c" ], "versions": [ { "version": "2.6.29", "status": "affected" }, { "version": "0", "lessThan": "2.6.29", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.287", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.231", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.174", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.120", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.64", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.11", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.2", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13", "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": "2.6.29", "versionEndExcluding": "5.4.287" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "5.10.231" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "5.15.174" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "6.1.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "6.6.64" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "6.11.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "6.12.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.29", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/57f048c2d205b85e34282a9b0b0ae177e84c2f44" }, { "url": "https://git.kernel.org/stable/c/b9322408d83accc8b96322bc7356593206288c56" }, { "url": "https://git.kernel.org/stable/c/8797b7712de704dc231f9e821d8eb3b9aeb3a032" }, { "url": "https://git.kernel.org/stable/c/16c507df509113c037cdc0ba642b9ab3389bd26c" }, { "url": "https://git.kernel.org/stable/c/9b07fb464eb69a752406e78e62ab3a60bfa7b00d" }, { "url": "https://git.kernel.org/stable/c/c6963a06ce5c61d3238751ada04ee1569663a828" }, { "url": "https://git.kernel.org/stable/c/297f14fbb81895f4ccdb0ad25d196786d6461e00" }, { "url": "https://git.kernel.org/stable/c/ce8f9fb651fac95dd41f69afe54d935420b945bd" } ], "title": "comedi: Flush partial mappings in error case", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:46:32.627Z" } } ] } }