{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38408", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.013Z", "datePublished": "2025-07-25T13:20:13.253Z", "dateUpdated": "2026-08-05T12:01:39.572Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:01:39.572Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngenirq/irq_sim: Initialize work context pointers properly\n\nInitialize `ops` member's pointers properly by using kzalloc() instead of\nkmalloc() when allocating the simulation work context. Otherwise the\npointers contain random content leading to invalid dereferencing." } ], "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 vulnerable code is reached through a local ioctl on the GPIO character device (/dev/gpiochipN) exposed by the gpio-mockup simulator, or via the local iio-dummy device; there is no network-facing path to irq_sim.\nAC:L - A single GPIO_V2_GET_LINE_IOCTL with an edge-detect flag deterministically drives request_threaded_irq() into irq_sim_request_resources(), which unconditionally tests and calls the uninitialized ops pointer on every request; the attacker can additionally groom the kmalloc-96 slab to shape the stale contents.\nPR:L - An unprivileged local account with access to the GPIO chardev — routinely granted via the \"gpio\" group udev rule on embedded, IoT and automation systems — can request an edge-triggered line and reach the wild call; no root or capability is required for the triggering ioctl.\nUI:N - The attacker triggers the faulty indirect call entirely through their own ioctl/close sequence; no action by another user or administrator is needed.\nS:U - The uninitialized function-pointer call executes in kernel context on the same host and does not cross a virtualization, IOMMU, or sandbox authority boundary.\nC:H - Branching to an attacker-groomable stale heap value is a direct control-flow hijack primitive that can be leveraged into arbitrary kernel memory disclosure; the call also leaks the state of recycled slab memory into control flow.\nI:H - Calling through an uninitialized function pointer whose backing slab object can be sprayed with attacker-controlled data yields instruction-pointer control and hence arbitrary kernel code execution and memory modification.\nA:H - Even without successful grooming, the indirect branch to stale garbage causes an immediate kernel oops or CFI panic, and it can be triggered repeatedly." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/irq/irq_sim.c" ], "versions": [ { "version": "337cbeb2c13eb4cab84f576fd402d7ae4ed31ae1", "lessThan": "186df821de0f34490ed5fc0861243748b2483861", "status": "affected", "versionType": "git" }, { "version": "337cbeb2c13eb4cab84f576fd402d7ae4ed31ae1", "lessThan": "c71aa4bb528ae6f8fd7577a0a39e5a03c60b04fb", "status": "affected", "versionType": "git" }, { "version": "337cbeb2c13eb4cab84f576fd402d7ae4ed31ae1", "lessThan": "ec3656a8cb428d763def32bc2fa695f94be23629", "status": "affected", "versionType": "git" }, { "version": "337cbeb2c13eb4cab84f576fd402d7ae4ed31ae1", "lessThan": "19bd7597858dd15802c1d99fcc38e528f469080a", "status": "affected", "versionType": "git" }, { "version": "337cbeb2c13eb4cab84f576fd402d7ae4ed31ae1", "lessThan": "7f73d1def72532bac4d55ea8838f457a6bed955c", "status": "affected", "versionType": "git" }, { "version": "337cbeb2c13eb4cab84f576fd402d7ae4ed31ae1", "lessThan": "8a2277a3c9e4cc5398f80821afe7ecbe9bdf2819", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/irq/irq_sim.c" ], "versions": [ { "version": "5.8", "status": "affected" }, { "version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.199", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.162", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.120", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.37", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.6", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16", "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": "5.8", "versionEndExcluding": "5.15.199" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.1.162" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.6.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.12.37" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.15.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.16" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/186df821de0f34490ed5fc0861243748b2483861" }, { "url": "https://git.kernel.org/stable/c/c71aa4bb528ae6f8fd7577a0a39e5a03c60b04fb" }, { "url": "https://git.kernel.org/stable/c/ec3656a8cb428d763def32bc2fa695f94be23629" }, { "url": "https://git.kernel.org/stable/c/19bd7597858dd15802c1d99fcc38e528f469080a" }, { "url": "https://git.kernel.org/stable/c/7f73d1def72532bac4d55ea8838f457a6bed955c" }, { "url": "https://git.kernel.org/stable/c/8a2277a3c9e4cc5398f80821afe7ecbe9bdf2819" } ], "title": "genirq/irq_sim: Initialize work context pointers properly", "x_generator": { "engine": "bippy-1.2.0" } } } }