{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-31578", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31578", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-04-24T14:42:09.519Z", "updatedAt": "2026-06-14T17:42:03.244Z", "importedAt": "2026-10-24T01:58:02.025Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "media: as102: fix to not free memory after the device is registered in as102_usb_probe()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: as102: fix to not free memory after the device is registered in as102_usb_probe()\n\nIn as102_usb driver, the following race condition occurs:\n```\n\t\tCPU0\t\t\t\t\t\tCPU1\nas102_usb_probe()\n kzalloc(); // alloc as102_dev_t\n ....\n usb_register_dev();\n\t\t\t\t\t\tfd = sys_open(\"/path/to/dev\"); // open as102 fd\n\t\t\t\t\t\t....\n usb_deregister_dev();\n ....\n kfree(); // free as102_dev_t\n ....\n\t\t\t\t\t\tsys_close(fd);\n\t\t\t\t\t\t as102_release() // UAF!!\n\t\t\t\t\t\t as102_usb_release()\n\t\t\t\t\t\t kfree(); // DFB!!\n```\n\nWhen a USB character device registered with usb_register_dev() is later\nunregistered (via usb_deregister_dev() or disconnect), the device node is\nremoved so new open() calls fail. However, file descriptors that are\nalready open do not go away immediately: they remain valid until the last\nreference is dropped and the driver's .release() is invoked.\n\nIn as102, as102_usb_probe() calls usb_register_dev() and then, on an\nerror path, does usb_deregister_dev() and frees as102_dev_t right away.\nIf userspace raced a successful open() before the deregistration, that\nopen FD will later hit as102_release() --> as102_usb_release() and access\nor free as102_dev_t again, occur a race to use-after-free and\ndouble-free vuln.\n\nThe fix is to never kfree(as102_dev_t) directly once usb_register_dev()\nhas succeeded. After deregistration, defer freeing memory to .release().\n\nIn other words, let release() perform the last kfree when the final open\nFD is closed.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "cd19f7d3e39b3160595d56bb3e3a2bf4f7f4669c", "status": "affected", "versionType": "git", "lessThan": "0d36653a3a821e5a974798adb347b3ea09332914" }, { "version": "cd19f7d3e39b3160595d56bb3e3a2bf4f7f4669c", "status": "affected", "versionType": "git", "lessThan": "25d500cf391e384356a612b85cf60b353ad3cd0c" }, { "version": "cd19f7d3e39b3160595d56bb3e3a2bf4f7f4669c", "status": "affected", "versionType": "git", "lessThan": "07ceb444c8f627cf863864d4274b5a77769725ed" }, { "version": "cd19f7d3e39b3160595d56bb3e3a2bf4f7f4669c", "status": "affected", "versionType": "git", "lessThan": "cb8092038e95dc1113a68e63762de40fff61ba71" }, { "version": "cd19f7d3e39b3160595d56bb3e3a2bf4f7f4669c", "status": "affected", "versionType": "git", "lessThan": "582fbecb3756330006fe1950762412a68c2cacd2" }, { "version": "cd19f7d3e39b3160595d56bb3e3a2bf4f7f4669c", "status": "affected", "versionType": "git", "lessThan": "09e9206008b887aa553733bd915d73131071a086" }, { "version": "cd19f7d3e39b3160595d56bb3e3a2bf4f7f4669c", "status": "affected", "versionType": "git", "lessThan": "2eeae47a438694408189138048a786be99954032" }, { "version": "cd19f7d3e39b3160595d56bb3e3a2bf4f7f4669c", "status": "affected", "versionType": "git", "lessThan": "7e5aedf6059cba2a669d86caeaf5a51f33ec85a1" }, { "version": "cd19f7d3e39b3160595d56bb3e3a2bf4f7f4669c", "status": "affected", "versionType": "git", "lessThan": "8bd29dbe03fc5b0f039ab2395ff37b64236d2f0c" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.14", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.14" }, { "version": "5.10.258", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.209", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.175", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.136", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.83", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.24", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "6.19.14", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.19.*" }, { "version": "7.0.1", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.0.*" }, { "version": "7.1", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }