{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-31576", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.119Z", "datePublished": "2026-04-24T14:42:08.188Z", "dateUpdated": "2026-06-14T17:42:00.110Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-14T17:42:00.110Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: hackrf: fix to not free memory after the device is registered in hackrf_probe()\n\nIn hackrf driver, the following race condition occurs:\n```\n\t\tCPU0\t\t\t\t\t\tCPU1\nhackrf_probe()\n kzalloc(); // alloc hackrf_dev\n ....\n v4l2_device_register();\n ....\n\t\t\t\t\t\tfd = sys_open(\"/path/to/dev\"); // open hackrf fd\n\t\t\t\t\t\t....\n v4l2_device_unregister();\n ....\n kfree(); // free hackrf_dev\n ....\n\t\t\t\t\t\tsys_ioctl(fd, ...);\n\t\t\t\t\t\t v4l2_ioctl();\n\t\t\t\t\t\t video_is_registered() // UAF!!\n\t\t\t\t\t\t....\n\t\t\t\t\t\tsys_close(fd);\n\t\t\t\t\t\t v4l2_release() // UAF!!\n\t\t\t\t\t\t hackrf_video_release()\n\t\t\t\t\t\t kfree(); // DFB!!\n```\n\nWhen a V4L2 or video device is unregistered, the device node is removed so\nnew open() calls are blocked.\n\nHowever, file descriptors that are already open-and any in-flight I/O-do\nnot terminate immediately; they remain valid until the last reference is\ndropped and the driver's release() is invoked.\n\nTherefore, freeing device memory on the error path after hackrf_probe()\nhas registered dev it will lead to a race to use-after-free vuln, since\nthose already-open handles haven't been released yet.\n\nAnd since release() free memory too, race to use-after-free and\ndouble-free vuln occur.\n\nTo prevent this, if device is registered from probe(), it should be\nmodified to free memory only through release() rather than calling\nkfree() directly." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/usb/hackrf/hackrf.c" ], "versions": [ { "version": "8bc4a9ed85046c214458c9e82aea75d2f46cfffd", "lessThan": "87b9685cca91ed715c39ba544715832d26a7f4b4", "status": "affected", "versionType": "git" }, { "version": "8bc4a9ed85046c214458c9e82aea75d2f46cfffd", "lessThan": "131ec9046e1c8af101aebdaec4e8095e05f3312b", "status": "affected", "versionType": "git" }, { "version": "8bc4a9ed85046c214458c9e82aea75d2f46cfffd", "lessThan": "67fd62e3efdc9dce01f76d95a745212f4feb38e6", "status": "affected", "versionType": "git" }, { "version": "8bc4a9ed85046c214458c9e82aea75d2f46cfffd", "lessThan": "45cbaf5c7cdc5386d86377f0daf94a17a007fed0", "status": "affected", "versionType": "git" }, { "version": "8bc4a9ed85046c214458c9e82aea75d2f46cfffd", "lessThan": "98a0a81ce78020c2522e0046f49d200de9778cb9", "status": "affected", "versionType": "git" }, { "version": "8bc4a9ed85046c214458c9e82aea75d2f46cfffd", "lessThan": "07e9e674b6146b1f6fc41b1f54b8968bf2802824", "status": "affected", "versionType": "git" }, { "version": "8bc4a9ed85046c214458c9e82aea75d2f46cfffd", "lessThan": "2145c71a8044362e82e9923f001ba2aeb771b848", "status": "affected", "versionType": "git" }, { "version": "8bc4a9ed85046c214458c9e82aea75d2f46cfffd", "lessThan": "fcd1d70792a35c8a97414fe429f48311e41269c2", "status": "affected", "versionType": "git" }, { "version": "8bc4a9ed85046c214458c9e82aea75d2f46cfffd", "lessThan": "3b7da2b4d0fe014eff181ed37e3bf832eb8ed258", "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/media/usb/hackrf/hackrf.c" ], "versions": [ { "version": "4.4", "status": "affected" }, { "version": "0", "lessThan": "4.4", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.136", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.83", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.24", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.14", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.1", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "4.4", "versionEndExcluding": "5.10.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.6.136" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.12.83" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.18.24" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.19.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "7.0.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/87b9685cca91ed715c39ba544715832d26a7f4b4" }, { "url": "https://git.kernel.org/stable/c/131ec9046e1c8af101aebdaec4e8095e05f3312b" }, { "url": "https://git.kernel.org/stable/c/67fd62e3efdc9dce01f76d95a745212f4feb38e6" }, { "url": "https://git.kernel.org/stable/c/45cbaf5c7cdc5386d86377f0daf94a17a007fed0" }, { "url": "https://git.kernel.org/stable/c/98a0a81ce78020c2522e0046f49d200de9778cb9" }, { "url": "https://git.kernel.org/stable/c/07e9e674b6146b1f6fc41b1f54b8968bf2802824" }, { "url": "https://git.kernel.org/stable/c/2145c71a8044362e82e9923f001ba2aeb771b848" }, { "url": "https://git.kernel.org/stable/c/fcd1d70792a35c8a97414fe429f48311e41269c2" }, { "url": "https://git.kernel.org/stable/c/3b7da2b4d0fe014eff181ed37e3bf832eb8ed258" } ], "title": "media: hackrf: fix to not free memory after the device is registered in hackrf_probe()", "x_generator": { "engine": "bippy-1.2.0" } } } }