221 lines
12 KiB
JSON
221 lines
12 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2022-49464",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2025-02-26T02:08:31.577Z",
|
|
"datePublished": "2025-02-26T02:13:10.321Z",
|
|
"dateUpdated": "2026-08-05T08:55:16.048Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T08:55:16.048Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix buffer copy overflow of ztailpacking feature\n\nI got some KASAN report as below:\n\n[ 46.959738] ==================================================================\n[ 46.960430] BUG: KASAN: use-after-free in z_erofs_shifted_transform+0x2bd/0x370\n[ 46.960430] Read of size 4074 at addr ffff8880300c2f8e by task fssum/188\n...\n[ 46.960430] Call Trace:\n[ 46.960430] <TASK>\n[ 46.960430] dump_stack_lvl+0x41/0x5e\n[ 46.960430] print_report.cold+0xb2/0x6b7\n[ 46.960430] ? z_erofs_shifted_transform+0x2bd/0x370\n[ 46.960430] kasan_report+0x8a/0x140\n[ 46.960430] ? z_erofs_shifted_transform+0x2bd/0x370\n[ 46.960430] kasan_check_range+0x14d/0x1d0\n[ 46.960430] memcpy+0x20/0x60\n[ 46.960430] z_erofs_shifted_transform+0x2bd/0x370\n[ 46.960430] z_erofs_decompress_pcluster+0xaae/0x1080\n\nThe root cause is that the tail pcluster won't be a complete filesystem\nblock anymore. So if ztailpacking is used, the second part of an\nuncompressed tail pcluster may not be ``rq->pageofs_out``."
|
|
}
|
|
],
|
|
"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 only via the local EROFS compressed read path (read/mmap/readahead → z_erofs_decompress_pcluster → z_erofs_shifted_transform) after a local block/file-backed mount; erofs has FS_REQUIRES_DEV and no network-protocol entry into the decompressor.\nAC:L - An image with ztailpacking and an uncompressed (SHIFTED) tail pcluster that is not a full filesystem block but spans two pages deterministically uses pageofs_out instead of lefthalf, so the oversized memcpy/memmove fires on ordinary reads with no race or attacker-uncontrollable condition.\nPR:L - Mounting erofs is not userns-capable, but on the worst-case deployment (already-mounted Android/embedded system images, or automounted/composefs/APEX images) any unprivileged local user with read access triggers decompression with no further capability check.\nUI:N - On typical EROFS deployments the filesystem is already mounted, and the attacker triggers the overflow entirely with their own reads; automounters and container/APEX image runtimes similarly mount attacker-supplied images without a separate interactive victim step.\nS:U - The OOB/UAF copy and resulting kernel memory corruption stay within the host kernel's security authority; no VM escape, IOMMU bypass, or other cross-boundary impact occurs.\nC:H - KASAN reports a use-after-free/out-of-bounds read of thousands of bytes that memcpy copies from adjacent/freed kernel memory into the file's page cache, which userspace can then read—an arbitrary kernel-memory disclosure per OOB-read/UAF guidance.\nI:H - The same overflow is a buffer copy overflow (oversized memcpy into the output page and memmove that can write past the inline source page when pageofs_in+pageofs_out exceeds PAGE_SIZE), and UAF/OOB write class corruption enables control-flow hijacking per kernel guidance.\nA:H - The demonstrated KASAN use-after-free/out-of-bounds access can oops or panic the kernel even when not fully exploited, which is Availability High under kernel CVSS guidance."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"fs/erofs/decompressor.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "ab749badf9f41f32509cd103391b81ea7e684b76",
|
|
"lessThan": "4d53a625f29074e7b8236c2c0e0922edb7608df9",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "ab749badf9f41f32509cd103391b81ea7e684b76",
|
|
"lessThan": "6b59e1907f58cf877c563dcf013159eb9f994b64",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "ab749badf9f41f32509cd103391b81ea7e684b76",
|
|
"lessThan": "dcbe6803fffd387f72b48c2373b5f5ed12a5804b",
|
|
"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/erofs/decompressor.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "5.17",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "5.17",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.17.14",
|
|
"lessThanOrEqual": "5.17.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.18.3",
|
|
"lessThanOrEqual": "5.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.19",
|
|
"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": "5.17",
|
|
"versionEndExcluding": "5.17.14"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.17",
|
|
"versionEndExcluding": "5.18.3"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.17",
|
|
"versionEndExcluding": "5.19"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/4d53a625f29074e7b8236c2c0e0922edb7608df9"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/6b59e1907f58cf877c563dcf013159eb9f994b64"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/dcbe6803fffd387f72b48c2373b5f5ed12a5804b"
|
|
}
|
|
],
|
|
"title": "erofs: fix buffer copy overflow of ztailpacking feature",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"scope": "UNCHANGED",
|
|
"version": "3.1",
|
|
"baseScore": 7.8,
|
|
"attackVector": "LOCAL",
|
|
"baseSeverity": "HIGH",
|
|
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
|
|
"integrityImpact": "HIGH",
|
|
"userInteraction": "NONE",
|
|
"attackComplexity": "LOW",
|
|
"availabilityImpact": "HIGH",
|
|
"privilegesRequired": "LOW",
|
|
"confidentialityImpact": "HIGH"
|
|
}
|
|
},
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2022-49464",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "total"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2025-02-27T18:16:06.988946Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"type": "CWE",
|
|
"cweId": "CWE-416",
|
|
"description": "CWE-416 Use After Free"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2025-02-27T18:22:32.836Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |