344 lines
18 KiB
JSON
344 lines
18 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-64361",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-07-19T15:36:31.783Z",
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"datePublished": "2026-07-25T08:50:17.345Z",
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"dateUpdated": "2026-08-17T04:54:07.849Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-17T04:54:07.849Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhfs/hfsplus: fix u32 overflow in check_and_correct_requested_length\n\ncheck_and_correct_requested_length() compares (off + len) against\nnode_size using u32 arithmetic. When the caller passes a large len\nvalue (e.g. from an underflowed subtraction in hfs_brec_remove()),\noff + len can wrap past 2^32 and produce a small result, causing the\nbounds check to pass when it should fail.\n\nFor example, with off=14 and len=0xFFFFFFF2 (underflowed from\ndata_off - keyoffset - size in hfs_brec_remove), off + len wraps to 6,\nwhich is less than a typical node_size of 512, so the check passes and\nthe subsequent memmove reads ~4GB past the node buffer.\n\nFix this by widening the addition to u64 before comparing against\nnode_size. This prevents the u32 wrap while keeping the logic\nstraightforward."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable HFS/HFS+ B-tree operations are reachable through local filesystem syscalls such as removexattr() and rename() after a crafted volume is mounted. No network protocol directly supplies the malformed B-tree metadata.\nAC:L - A crafted B-tree deterministically produces the length underflow and u32 addition wrap; no race or condition outside the attacker's control is required.\nPR:L - Although mounting HFS/HFS+ requires init-namespace CAP_SYS_ADMIN, an unprivileged user with ordinary write access to a file on an already mounted crafted volume can trigger the flaw through user.* xattr removal or permitted rename operations.\nUI:N - The attacker can invoke the triggering filesystem syscall directly once the crafted volume is mounted; no action by another user is required.\nS:U - The corruption occurs in the kernel while processing filesystem metadata and does not cross a separate virtualization, IOMMU, or other security authority boundary.\nC:H - The wrapped near-4-GiB copy performs out-of-bounds reads and, in HFS+, can walk beyond the node's page-pointer array, providing a defensible path to broad kernel-memory disclosure.\nI:H - The affected move, copy, clear, and write paths can write beyond the B-tree node buffer; the huge memmove is therefore exploitable memory corruption rather than a read-only crash.\nA:H - The enormous out-of-bounds memory operation can reliably cause a kernel oops or panic and can corrupt large regions of kernel memory, producing complete system unavailability."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/hfs/bnode.c",
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"fs/hfsplus/hfsplus_fs.h"
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],
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"versions": [
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{
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"version": "67ecc81f6492275c9c54280532f558483c99c90e",
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"lessThan": "c8dd112173c02adf539fe2ad34a45f5e0068780d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a1a60e79502279f996e55052f50cc14919020475",
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"lessThan": "fc9d1447ca3cdc78d2e4ace1ce1f3a7c77ca08b1",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "fe2891a9c43ab87d1a210d61e6438ca6936e2f62",
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"lessThan": "671c3fcc2ad31c1311ea6414382a2d95104ae1b9",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "384a66b89f9540a9a8cb0f48807697dfabaece4c",
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"lessThan": "b6a481642ea1977be2f84dc08c5affd742c177e7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "efc095b35b23297e419c2ab4fc1ed1a8f0781a29",
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"lessThan": "7399c3baee7bb622a92f0b895cd4d3009a693f2b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a431930c9bac518bf99d6b1da526a7f37ddee8d8",
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"lessThan": "607217f7ad419b53926f71e3f75001813bbc08ad",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a431930c9bac518bf99d6b1da526a7f37ddee8d8",
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"lessThan": "c25d3c931a63e762fcaa9cb125b901c53b62403f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a431930c9bac518bf99d6b1da526a7f37ddee8d8",
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"lessThan": "966cb76fb2857a4242cab6ea2ea17acf818a3da7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "e7d2dc2421e821e4045775e6dc226378328de6f6",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "fc7f732984ec91f30be3e574e0644066d07f2b78",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "eec522fd0d28106b14a59ab2d658605febe4a3bb",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5.10.241",
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"lessThan": "5.10.261",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.15.190",
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"lessThan": "5.15.212",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.1.149",
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"lessThan": "6.1.178",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.6.103",
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"lessThan": "6.6.145",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.12.43",
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"lessThan": "6.12.97",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.4.297",
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"lessThan": "5.5",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.15.11",
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"lessThan": "6.16",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.16.2",
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"lessThan": "6.17",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/hfs/bnode.c",
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"fs/hfsplus/hfsplus_fs.h"
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],
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"versions": [
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{
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"version": "6.17",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.17",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.261",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.212",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.178",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.145",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.97",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.40",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.4",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.10.241",
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"versionEndExcluding": "5.10.261"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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]
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/c8dd112173c02adf539fe2ad34a45f5e0068780d"
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},
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{
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"url": "https://git.kernel.org/stable/c/fc9d1447ca3cdc78d2e4ace1ce1f3a7c77ca08b1"
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},
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{
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"url": "https://git.kernel.org/stable/c/671c3fcc2ad31c1311ea6414382a2d95104ae1b9"
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},
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{
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"url": "https://git.kernel.org/stable/c/b6a481642ea1977be2f84dc08c5affd742c177e7"
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},
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{
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"url": "https://git.kernel.org/stable/c/7399c3baee7bb622a92f0b895cd4d3009a693f2b"
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},
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{
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"url": "https://git.kernel.org/stable/c/607217f7ad419b53926f71e3f75001813bbc08ad"
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},
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{
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"url": "https://git.kernel.org/stable/c/c25d3c931a63e762fcaa9cb125b901c53b62403f"
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},
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{
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"url": "https://git.kernel.org/stable/c/966cb76fb2857a4242cab6ea2ea17acf818a3da7"
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}
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],
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"title": "hfs/hfsplus: fix u32 overflow in check_and_correct_requested_length",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |