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vuln-cve/data/2026/81xxx/CVE-2026-81008.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-81008",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-08-26T14:34:25.812Z",
"datePublished": "2026-09-11T19:42:59.405Z",
"dateUpdated": "2026-10-19T08:46:33.532Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-10-19T08:46:33.532Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ninterconnect: Fix use after free in icc_get() and of_icc_get_by_index()\n\nIn of_icc_get_by_index() and icc_get(), if the dynamic allocation for\npath->name fails via kasprintf(), the error handling path directly\ncalls kfree(path) to free the path object and returns an error.\n\nHowever, prior to this point, path_find() calls path_init(), which\nalready links the path's requests into the req_list of the respective\ninterconnect nodes via hlist_add_head(). Directly invoking kfree(path)\nleaves dangling pointers in the hlist. A subsequent call to icc_get()\nor icc_set_bw() will traverse or modify these corrupted lists, triggering\na slab use afterfree.\n\nKASAN report showing the vulnerability when reproducing via debugfs:\n\n BUG: KASAN: slab-use-after-free in path_find+0x6f8/0xcfc\n Write of size 8 at addr fff000000d43f748 by task sh/1\n ...\n Call trace:\n kasan_report+0xac/0xfc\n path_find+0x6f8/0xcfc\n icc_get+0x148/0x380\n icc_get_set+0xf8/0x2d0\n ...\n Freed by task 1:\n kfree+0x1a0/0x4a4\n icc_get+0x2cc/0x380\n icc_get_set+0xf8/0x2d0\n\nFix this by replacing kfree(path) with the proper teardown function,\nicc_put(path), which safely removes the requests from the req_list using\nhlist_del() and drops the provider usage references before freeing the\nmemory.\n\nAdditionally, in icc_get(), ensure that the icc_lock mutex is released\nprior to calling icc_put(path) to avoid a deadlock, as icc_put()\ninternally acquires the same lock."
}
],
"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 interconnect core is an on-chip SoC bandwidth API. of_icc_get_by_index() runs from local consumer-driver probe (Qualcomm GPU, venus/camera, UFS, USB, OPP on Android/embedded) and icc_get() from the optional debugfs test client; no network or adjacent protocol handler reaches this code.\nAC:L - Once kasprintf() fails after path_init() has linked path->reqs into node req_lists, the dangling hlist pointers persist and the next icc_set_bw()/path_find() is a deterministic UAF, not a race. A local attacker can force the GFP_KERNEL name allocation to fail with memory pressure and retry via driver rebind, module load, or deferred probe.\nPR:L - After the error path plants dangling req_list entries, an ordinary local/Android user triggers the UAF through icc_set_bw() via V4L2, DRM render nodes, or block I/O on already-probed consumers that share interconnect nodes. of_icc_get() itself runs from consumer probe/rebind whose privilege gating is ambiguous, so Low applies.\nUI:N - The attacker induces memory pressure and device activity (or a rebind/probe) from their own process. No separate victim action such as mounting a filesystem or opening a file is required.\nS:U - The UAF corrupts kernel heap objects and interconnect provider state in the host kernel. This is standard kernel privilege escalation and does not cross a VM, IOMMU, or sandbox security boundary.\nC:H - This is a slab use-after-free of struct icc_path whose embedded icc_req hlist nodes remain on node->req_list. aggregate_requests() and the interconnect debugfs summary read enabled/tag/avg_bw/peak_bw and r->dev from the freed object, so heap reuse yields an arbitrary kernel read primitive.\nI:H - path_find() hlist_add_head() performs an 8-byte write through the dangling first pointer into freed memory, and a sprayed next pointer hijacks later list walks. apply_constraints() then programs attacker-controlled bandwidth into interconnect hardware, giving a UAF write/control-flow primitive.\nA:H - Walking LIST_POISON or a dangling req_node in aggregate_requests() or path_find() oopses or panics the kernel. Any use-after-free is High availability impact even when not fully turned into code execution."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/interconnect/core.c"
],
"versions": [
{
"version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
"lessThan": "03c3af594dea9196cf6ca70d914b42aa8c873c35",
"status": "affected",
"versionType": "git"
},
{
"version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
"lessThan": "d4d73decdb9a44a248b1cbd04ed6f334df544d9c",
"status": "affected",
"versionType": "git"
},
{
"version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
"lessThan": "9a671125d4228357e5b929733c4593d27a273749",
"status": "affected",
"versionType": "git"
},
{
"version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
"lessThan": "fedea72e8f312fe7d0c6cb19353e61d2d5643b11",
"status": "affected",
"versionType": "git"
},
{
"version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
"lessThan": "a4e9aa7907ade87d1d96853d14e05dcf682f8363",
"status": "affected",
"versionType": "git"
},
{
"version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
"lessThan": "db8147c5d5ad2cfa21c2be566f95981b41b05de6",
"status": "affected",
"versionType": "git"
},
{
"version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
"lessThan": "d715d19cfcfe99f361adb05cefc143a95d400b87",
"status": "affected",
"versionType": "git"
},
{
"version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
"lessThan": "25c7e242aca084fdc1098248194032317dca625d",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/interconnect/core.c"
],
"versions": [
{
"version": "5.6",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.6",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.270",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.221",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.188",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.157",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.109",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.50",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.2.4",
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.3",
"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": "5.6",
"versionEndExcluding": "5.10.270"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
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},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "6.6.157"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "6.12.109"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "6.18.50"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "7.2.4"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "7.3"
}
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}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/03c3af594dea9196cf6ca70d914b42aa8c873c35"
},
{
"url": "https://git.kernel.org/stable/c/d4d73decdb9a44a248b1cbd04ed6f334df544d9c"
},
{
"url": "https://git.kernel.org/stable/c/9a671125d4228357e5b929733c4593d27a273749"
},
{
"url": "https://git.kernel.org/stable/c/fedea72e8f312fe7d0c6cb19353e61d2d5643b11"
},
{
"url": "https://git.kernel.org/stable/c/a4e9aa7907ade87d1d96853d14e05dcf682f8363"
},
{
"url": "https://git.kernel.org/stable/c/db8147c5d5ad2cfa21c2be566f95981b41b05de6"
},
{
"url": "https://git.kernel.org/stable/c/d715d19cfcfe99f361adb05cefc143a95d400b87"
},
{
"url": "https://git.kernel.org/stable/c/25c7e242aca084fdc1098248194032317dca625d"
}
],
"title": "interconnect: Fix use after free in icc_get() and of_icc_get_by_index()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
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