{ "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 — a common configuration, since real IEEE 1284 device IDs frequently run 300+ bytes and can be up to 1024 — 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 — 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 — 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": "affected", "versionType": "git" }, { "version": "7f4da759092a1a6ce35fb085182d02de8cc4cc84", "lessThan": "fca048f222ce9dcbde5708ba2bf81d85a4a27952", "status": "affected", "versionType": "git" }, { "version": "b579ea3516c371ecf59d073772bc45dfd28c8a0e", "lessThan": "66029078fee00646e2e9dbb8f41ff7819f8e7569", "status": "affected", "versionType": "git" }, { "version": "ab11dac93d2d568d151b1918d7b84c2d02bacbd5", "lessThan": "2a8b26a09c8e3ea03da1ef3cd0ef6b96e559fba6", "status": "affected", "versionType": "git" }, { "version": "ab11dac93d2d568d151b1918d7b84c2d02bacbd5", "lessThan": "02ac3a9ef3a18b58d8f3ea2b6e46de657bf6c4f9", "status": "affected", "versionType": "git" }, { "version": "7789a1d6792af410aa9b39a1eb237ed24fa2170a", "status": "affected", "versionType": "git" }, { "version": "4.19.320", "lessThan": "4.19.323", "status": "affected", "versionType": "semver" }, { "version": "5.4.282", "lessThan": "5.4.285", "status": "affected", "versionType": "semver" }, { "version": "5.10.224", "lessThan": "5.10.228", "status": "affected", "versionType": "semver" }, { "version": "5.15.165", "lessThan": "5.15.169", "status": "affected", "versionType": "semver" }, { "version": "6.1.103", "lessThan": "6.1.114", "status": "affected", "versionType": "semver" }, { "version": "6.6.44", "lessThan": "6.6.58", "status": "affected", "versionType": "semver" }, { "version": "6.10.3", "lessThan": "6.11", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/parport/procfs.c" ], "versions": [ { "version": "6.11", "status": "affected" }, { "version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.323", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.285", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.228", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.169", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.114", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.58", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.5", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "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": "4.19.320", "versionEndExcluding": "4.19.323" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.282", "versionEndExcluding": "5.4.285" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.224", "versionEndExcluding": "5.10.228" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.165", "versionEndExcluding": "5.15.169" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.103", "versionEndExcluding": "6.1.114" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.44", "versionEndExcluding": "6.6.58" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.11.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/8aadef73ba3b325704ed5cfc4696a25c350182cf" }, { "url": "https://git.kernel.org/stable/c/b0641e53e6cb937487b6cfb15772374f0ba149b3" }, { "url": "https://git.kernel.org/stable/c/1826b6d69bbb7f9ae8711827facbb2ad7f8d0aaa" }, { "url": "https://git.kernel.org/stable/c/440311903231c6e6c9bcf8acb6a2885a422e00bc" }, { "url": "https://git.kernel.org/stable/c/fca048f222ce9dcbde5708ba2bf81d85a4a27952" }, { "url": "https://git.kernel.org/stable/c/66029078fee00646e2e9dbb8f41ff7819f8e7569" }, { "url": "https://git.kernel.org/stable/c/2a8b26a09c8e3ea03da1ef3cd0ef6b96e559fba6" }, { "url": "https://git.kernel.org/stable/c/02ac3a9ef3a18b58d8f3ea2b6e46de657bf6c4f9" } ], "title": "parport: Proper fix for array out-of-bounds access", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:25:09.766Z" } } ] } }