CVE-2024-50074

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2024-50074", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.940Z", "datePublished": "2024-10-29T00:50:16.263Z", "dateUpdated": "2026-08-05T11:41:24.682Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:41:24.682Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nparport: Proper fix for array out-of-bounds access\n\nThe recent fix for array out-of-bounds accesses replaced sprintf()\ncalls blindly with snprintf(). However, since snprintf() returns the\nwould-be-printed size, not the actually output size, the length\ncalculation can still go over the given limit.\n\nUse scnprintf() instead of snprintf(), which returns the actually\noutput letters, for addressing the potential out-of-bounds access\nproperly."}], "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 reached by a plain read() syscall on /proc/sys/dev/parport/parportN/autoprobe (and siblings), which requires local access to the system. No network or physical interaction with the machine is needed by the attacker at exploit time on a host that already has a parallel-port peripheral attached.\nAC:L - Once a parport peripheral with a device ID exceeding the 256-byte stack buffer is present \u2014 a common configuration, since real IEEE 1284 device IDs frequently run 300+ bytes and can be up to 1024 \u2014 the attacker triggers the overflow deterministically and repeatedly by simply reading the file with a large count. There is no race, no memory-layout guessing, and no per-attempt effort.\nPR:L - The sysctl entries are registered with .mode = 0444 and sysctl_perm() enforces nothing beyond that, so any unprivileged local account can read them. No capability, no root, and no user-namespace trickery is required.\nUI:N - The attacker performs the read themselves; no victim action, mount, or file-open by another user is needed.\nS:U - The corruption and the disclosure are confined to the kernel's own stack within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - memcpy(result, buffer, len) with len > sizeof(buffer) copies hundreds of bytes of adjacent kernel stack into the sysctl output buffer, which is then copied straight to userspace \u2014 a direct kernel stack memory disclosure exposing stack canaries, saved registers, and kernel pointers usable to defeat KASLR.\nI:H - In do_autoprobe(), sizeof(buffer) - len underflows to a huge size_t once len exceeds 256, giving an unbounded write of peripheral-controlled string data past the end of a 256-byte stack buffer \u2014 overwriting saved registers and the return address, which is exploitable for control-flow hijacking.\nA:H - Stack corruption in these handlers triggers __stack_chk_fail() and a non-syncing kernel panic, as demonstrated in the original bug report's backtrace; an unprivileged user can induce it at will."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/parport/procfs.c"], "versions": [{"version": "166a0bddcc27de41fe13f861c8348e8e53e988c8", "lessThan": "8aadef73ba3b325704ed5cfc4696a25c350182cf", "status": "affected", "versionType": "git"}, {"version": "47b3dce100778001cd76f7e9188944b5cb27a76d", "lessThan": "b0641e53e6cb937487b6cfb15772374f0ba149b3", "status": "affected", "versionType": "git"}, {"version": "a44f88f7576bc1916d8d6293f5c62fbe7cbe03e0", "lessThan": "1826b6d69bbb7f9ae8711827facbb2ad7f8d0aaa", "status": "affected", "versionType": "git"}, {"version": "c719b393374d3763e64900ee19aaed767d5a08d6", "lessThan": "440311903231c6e6c9bcf8acb6a2885a422e00bc", "status": 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However, since snprintf() returns the\nwould-be-printed size, not the actually output size, the length\ncalculation can still go over the given limit.\n\nUse scnprintf() instead of snprintf(), which returns the actually\noutput letters, for addressing the potential out-of-bounds access\nproperly."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: parport: Soluci\u00f3n adecuada para el acceso fuera de los l\u00edmites a matrices La soluci\u00f3n reciente para los accesos fuera de los l\u00edmites a matrices reemplaz\u00f3 las llamadas sprintf() ciegamente con snprintf(). Sin embargo, dado que snprintf() devuelve el tama\u00f1o que se imprimir\u00e1, no el tama\u00f1o de salida real, el c\u00e1lculo de la longitud a\u00fan puede superar el l\u00edmite dado. Utilice scnprintf() en lugar de snprintf(), que devuelve las letras de salida reales, para abordar el posible acceso fuera de los l\u00edmites correctamente."}], "id": "CVE-2024-50074", "lastModified": "2026-08-04T11:21:15.143", "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"}]}, "published": "2024-10-29T01:15:04.540", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/02ac3a9ef3a18b58d8f3ea2b6e46de657bf6c4f9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1826b6d69bbb7f9ae8711827facbb2ad7f8d0aaa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2a8b26a09c8e3ea03da1ef3cd0ef6b96e559fba6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/440311903231c6e6c9bcf8acb6a2885a422e00bc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/66029078fee00646e2e9dbb8f41ff7819f8e7569"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8aadef73ba3b325704ed5cfc4696a25c350182cf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b0641e53e6cb937487b6cfb15772374f0ba149b3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fca048f222ce9dcbde5708ba2bf81d85a4a27952"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2025:6966", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:6966", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}], "bugzilla": {"description": "kernel: parport: Proper fix for array out-of-bounds access", "id": "2322310", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2322310"}, "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": "verified"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nparport: Proper fix for array out-of-bounds access\nThe recent fix for array out-of-bounds accesses replaced sprintf()\ncalls blindly with snprintf(). However, since snprintf() returns the\nwould-be-printed size, not the actually output size, the length\ncalculation can still go over the given limit.\nUse scnprintf() instead of snprintf(), which returns the actually\noutput letters, for addressing the potential out-of-bounds access\nproperly.", "An out-of-bounds array access memory flaw was found in the Linux kernel. When snprintf() returns the would-be-printed size, not the actual output size, the length\ncalculation can still go over the given limit and cause an overflow, resulting in loss of availability of the system."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2024-50074", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50074\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50074\nhttps://lore.kernel.org/linux-cve-announce/2024102935-CVE-2024-50074-d44d@gregkh/T"], "statement": "This vulnerability cannot be exploited to cause more than a denial of service, which is why the CVSS has been rated as such by Red Hat.", "threat_severity": "Moderate"}

{}