{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-50165", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.962Z", "datePublished": "2024-11-07T09:31:41.923Z", "dateUpdated": "2026-08-05T11:42:13.725Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:42:13.725Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Preserve param->string when parsing mount options\n\nIn bpf_parse_param(), keep the value of param->string intact so it can\nbe freed later. Otherwise, the kmalloc area pointed to by param->string\nwill be leaked as shown below:\n\nunreferenced object 0xffff888118c46d20 (size 8):\n comm \"new_name\", pid 12109, jiffies 4295580214\n hex dump (first 8 bytes):\n 61 6e 79 00 38 c9 5c 7e any.8.\\~\n backtrace (crc e1b7f876):\n [<00000000c6848ac7>] kmemleak_alloc+0x4b/0x80\n [<00000000de9f7d00>] __kmalloc_node_track_caller_noprof+0x36e/0x4a0\n [<000000003e29b886>] memdup_user+0x32/0xa0\n [<0000000007248326>] strndup_user+0x46/0x60\n [<0000000035b3dd29>] __x64_sys_fsconfig+0x368/0x3d0\n [<0000000018657927>] x64_sys_call+0xff/0x9f0\n [<00000000c0cabc95>] do_syscall_64+0x3b/0xc0\n [<000000002f331597>] entry_SYSCALL_64_after_hwframe+0x4b/0x53" } ], "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 bug is reached through the fsopen(2)/fsconfig(2) syscall pair (or mount(2) with monolithic options) against the bpf filesystem, requiring local system access. There is no remote or adjacent-network path to bpffs mount-option parsing.\nAC:L - A single deterministic fsconfig() call with delegate_cmds=\"x:any\" reliably triggers the interior-pointer kfree(), and a trivial loop reliably drives the unbounded leak; no race, timing window, or uncontrollable precondition is involved. CONFIG_BPF_SYSCALL/bpffs is enabled in essentially all distribution kernels.\nPR:L - bpf_fs_type is FS_USERNS_MOUNT and fsopen() only requires ns_capable(mnt_ns->user_ns, CAP_SYS_ADMIN), so any unprivileged user can reach bpf_parse_param() via unshare -Urm. The CAP_SYS_ADMIN check on delegation options executes only after the buggy strsep loop, so it provides no protection.\nUI:N - The attacker performs the entire sequence — create a user/mount namespace, fsopen the bpf filesystem, issue fsconfig — with no action by any other user. No victim must mount anything or open any file.\nS:U - The corruption and resource exhaustion occur in the kernel slab allocator of the same host, within the same security authority. No VM, IOMMU, or hypervisor boundary is crossed.\nC:H - Freeing an interior pointer inserts a misaligned address into the SLUB freelist, so a subsequent allocation returns a chunk overlapping adjacent live objects — a type-confusion/aliasing primitive that lets the attacker read kernel data belonging to other allocations. Per kernel scoring guidance, slab corruption of this class is treated as a full confidentiality compromise.\nI:H - The same misaligned kfree() causes set_freepointer() to write a heap pointer out of bounds of the freed chunk and hands out overlapping allocations, giving an attacker-usable write primitive over adjacent slab objects. Heap freelist corruption of this kind is the standard basis for privilege escalation.\nA:H - Slab freelist corruption produces kernel panics/oopses (and is caught immediately as an invalid free on KASAN/SLUB_DEBUG builds), and the leak variant lets an unprivileged user drain kernel memory in an unbounded loop until OOM. Either path yields a full denial of service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/bpf/inode.c" ], "versions": [ { "version": "6c1752e0b6ca8c7021d6da3926738d8d88f601a9", "lessThan": "5d7a0a426540319327309035509cb768a2f5c2c4", "status": "affected", "versionType": "git" }, { "version": "6c1752e0b6ca8c7021d6da3926738d8d88f601a9", "lessThan": "1f97c03f43fadc407de5b5cb01c07755053e1c22", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/bpf/inode.c" ], "versions": [ { "version": "6.9", "status": "affected" }, { "version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.6", "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": "6.9", "versionEndExcluding": "6.11.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/5d7a0a426540319327309035509cb768a2f5c2c4" }, { "url": "https://git.kernel.org/stable/c/1f97c03f43fadc407de5b5cb01c07755053e1c22" } ], "title": "bpf: Preserve param->string when parsing mount options", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-50165", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T20:20:04.347964Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-401", "description": "CWE-401 Missing Release of Memory after Effective Lifetime" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:27:11.791Z" } } ] } }