159 lines
8.9 KiB
JSON
159 lines
8.9 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-43166",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-05-01T14:12:55.990Z",
|
|
"datePublished": "2026-05-06T11:27:43.242Z",
|
|
"dateUpdated": "2026-08-05T12:26:16.817Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T12:26:16.817Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix interlaced plain identification for encoded extents\n\nOnly plain data whose start position and on-disk physical length are\nboth aligned to the block size should be classified as interlaced\nplain extents. Otherwise, it must be treated as shifted plain extents.\n\nThis issue was found by syzbot using a crafted compressed image\ncontaining plain extents with unaligned physical lengths, which can\ncause OOB read in z_erofs_transform_plain()."
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
|
|
"baseScore": 7.1,
|
|
"baseSeverity": "HIGH"
|
|
},
|
|
"scenarios": [
|
|
{
|
|
"lang": "en",
|
|
"value": "AV:L - The vulnerable path is reached by local VFS operations on a crafted EROFS image: mount the image and read/open a compressed file so EROFS performs readahead/decompression. There is no direct network, adjacent, or physical protocol entry point in EROFS itself.\nAC:L - The trigger is deterministic malformed extent metadata with an aligned physical start and unaligned encoded length; syzbot reproduced it with a crafted image and ordinary mount/open/read activity. No attacker-uncontrolled race or fragile timing condition is required.\nPR:N - An attacker can craft and supply the malicious EROFS image without privileges; the privileged filesystem mount/read can be performed by an interacting victim or image-processing environment. EROFS is not marked FS_USERNS_MOUNT, so a purely self-triggered local mount would require CAP_SYS_ADMIN, but the higher-severity defensible scenario is malicious media/image handling.\nUI:R - Exploitation requires some user or system action to mount or otherwise process the crafted EROFS image and read/open the affected file. The vulnerable code is not reached passively before the image is mounted/read.\nS:U - The bug is in kernel filesystem parsing/decompression and affects the same kernel security authority. It does not cross a hypervisor, VM, IOMMU, or sandbox boundary by itself.\nC:H - The bug causes a slab/out-of-bounds read of up to a page-sized copy in z_erofs_transform_plain(), and the copied bytes are placed into output/page-cache data readable through the file path. This can disclose kernel memory and is not limited to a few fixed bytes.\nI:N - The faulty operation is an out-of-bounds read from the input page mapping followed by copying into the file output page; it does not write out of bounds or corrupt kernel control data. No direct integrity modification primitive is evident.\nA:H - syzbot demonstrated a KASAN slab-out-of-bounds/use-after-free read in this path, and such kernel memory-safety faults can produce an oops/panic on hardened or faulting configurations. The crafted image can retrigger the fault through repeated reads."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"fs/erofs/zmap.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "1d191b4ca51d73699cb127386b95ac152af2b930",
|
|
"lessThan": "9d5a97bc71ed5783687705c708454c4453aa91d1",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "1d191b4ca51d73699cb127386b95ac152af2b930",
|
|
"lessThan": "d3790f26d38606f020212486359b84632c19d08b",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "1d191b4ca51d73699cb127386b95ac152af2b930",
|
|
"lessThan": "4a2d046e4b13202a6301a993961f5b30ae4d7119",
|
|
"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/zmap.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "6.15",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "6.15",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.16",
|
|
"lessThanOrEqual": "6.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.19.6",
|
|
"lessThanOrEqual": "6.19.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.0",
|
|
"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": "6.15",
|
|
"versionEndExcluding": "6.18.16"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.15",
|
|
"versionEndExcluding": "6.19.6"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.15",
|
|
"versionEndExcluding": "7.0"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/9d5a97bc71ed5783687705c708454c4453aa91d1"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/d3790f26d38606f020212486359b84632c19d08b"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/4a2d046e4b13202a6301a993961f5b30ae4d7119"
|
|
}
|
|
],
|
|
"title": "erofs: fix interlaced plain identification for encoded extents",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
}
|
|
}
|
|
} |