{ "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", "versionEndExcluding": "5.15.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "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" } ] } ] } ], "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" } } } }