{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-72033", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.901Z", "datePublished": "2026-08-15T05:51:55.102Z", "dateUpdated": "2026-08-17T05:39:36.089Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:39:36.089Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\norangefs: keep the readdir entry size 64-bit in fill_from_part()\n\nfill_from_part() computes the size of a directory entry in size_t but\nstores it in a __u32. An entry length near U32_MAX wraps it to a small\nvalue, bypasses the bounds check, and is then used to index the entry,\nreading far past the directory part -- an out-of-bounds read that oopses\nthe kernel.\n\nCompute the size as a u64 so it cannot truncate; the bounds check then\nrejects the entry. The trailer is supplied by the userspace client." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - fill_from_part() parses readdir trailer bytes relayed by pvfs2-client-core from an OrangeFS/PVFS server over the cluster network; a malicious or compromised server can supply crafted directory-entry lengths that reach the kernel during getdents on HPC client nodes without local shell access.\nAC:L - An entry length near U32_MAX makes padlen truncate to a small __u32, reliably bypassing the bounds check and forcing the subsequent s[*len] probe; the attacker fully controls the trailer fields and no race, heap layout, or timing condition beyond readdir is required.\nPR:N - A remote malicious OrangeFS/PVFS metadata server needs no account, capabilities, or namespaces on victim HPC compute nodes; once clients mount the filesystem, any process with directory read access can trigger parsing of attacker-supplied trailer bytes.\nUI:N - No victim interaction is required beyond normal automated directory scans (cron, parallel job launchers, monitoring); the attacker does not need a user to mount the filesystem or click anything—only pre-existing cluster mounts to the compromised server.\nS:U - The out-of-bounds read and resulting kernel oops occur entirely within the victim client's kernel address space during VFS readdir processing; there is no inherent crossing of VM, container, IOMMU, or sandbox security boundaries.\nC:H - The integer truncation lets the kernel index gigabytes past the vzalloc readdir part buffer via s[*len], an unbounded out-of-bounds read over adjacent kernel memory before the fault; per CNA guidance OOB reads of this class are rated High.\nI:H - The bounds bypass is a memory-corruption class flaw that can reach beyond the allocated directory part into adjacent kernel heap; even though the immediate access is a read, CNA guidance rates such unchecked OOB probes as High integrity impact due to exploit chaining potential.\nA:H - The maintainer confirmed the out-of-bounds read oopses the kernel; the inflated index can touch unmapped pages far outside the PART_SIZE-limited trailer buffer, causing a kernel fault, panic, or node crash on HPC clients during routine readdir." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/orangefs/dir.c" ], "versions": [ { "version": "480e3e532e31666a18520a7964bb4095d7a16b9a", "lessThan": "1679780f482feeb82acb5995587d4fb1d1fe82fd", "status": "affected", "versionType": "git" }, { "version": "480e3e532e31666a18520a7964bb4095d7a16b9a", "lessThan": "a72bbb43689591c9d36e3bb45c2d4e688cf92682", "status": "affected", "versionType": "git" }, { "version": "480e3e532e31666a18520a7964bb4095d7a16b9a", "lessThan": "36723b28e3293047f087f4501f1ef4ead418dd84", "status": "affected", "versionType": "git" }, { "version": "480e3e532e31666a18520a7964bb4095d7a16b9a", "lessThan": "07c05601a9a8e5d4481b2a4a16dc0e3c5bc63ad9", "status": "affected", "versionType": "git" }, { "version": "480e3e532e31666a18520a7964bb4095d7a16b9a", "lessThan": "fdf06a1b66ff39664b01c6bb6a2aa98d81e8ebe1", "status": "affected", "versionType": "git" }, { "version": "480e3e532e31666a18520a7964bb4095d7a16b9a", "lessThan": "82fc886e244c76fadf05ef1958aaf8815478ccde", "status": "affected", "versionType": "git" }, { "version": "480e3e532e31666a18520a7964bb4095d7a16b9a", "lessThan": "e3d325c0bdb7bc5d1b4cc8d8441d79794cd03729", "status": "affected", "versionType": "git" }, { "version": "480e3e532e31666a18520a7964bb4095d7a16b9a", "lessThan": "18227a6bc98bd0ba96ed3ce9d5b28776a5a28dfc", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/orangefs/dir.c" ], "versions": [ { "version": "4.12", "status": "affected" }, { "version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "4.12", "versionEndExcluding": "5.10.261" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/1679780f482feeb82acb5995587d4fb1d1fe82fd" }, { "url": "https://git.kernel.org/stable/c/a72bbb43689591c9d36e3bb45c2d4e688cf92682" }, { "url": "https://git.kernel.org/stable/c/36723b28e3293047f087f4501f1ef4ead418dd84" }, { "url": "https://git.kernel.org/stable/c/07c05601a9a8e5d4481b2a4a16dc0e3c5bc63ad9" }, { "url": "https://git.kernel.org/stable/c/fdf06a1b66ff39664b01c6bb6a2aa98d81e8ebe1" }, { "url": "https://git.kernel.org/stable/c/82fc886e244c76fadf05ef1958aaf8815478ccde" }, { "url": "https://git.kernel.org/stable/c/e3d325c0bdb7bc5d1b4cc8d8441d79794cd03729" }, { "url": "https://git.kernel.org/stable/c/18227a6bc98bd0ba96ed3ce9d5b28776a5a28dfc" } ], "title": "orangefs: keep the readdir entry size 64-bit in fill_from_part()", "x_generator": { "engine": "bippy-1.2.0" } } } }