{ "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-2025-68367", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-68367", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-12-24T10:32:54.084Z", "updatedAt": "2026-05-11T21:51:50.117Z", "importedAt": "2026-10-24T01:57:44.935Z", "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": "macintosh/mac_hid: fix race condition in mac_hid_toggle_emumouse", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmacintosh/mac_hid: fix race condition in mac_hid_toggle_emumouse\n\nThe following warning appears when running syzkaller, and this issue also\nexists in the mainline code.\n\n ------------[ cut here ]------------\n list_add double add: new=ffffffffa57eee28, prev=ffffffffa57eee28, next=ffffffffa5e63100.\n WARNING: CPU: 0 PID: 1491 at lib/list_debug.c:35 __list_add_valid_or_report+0xf7/0x130\n Modules linked in:\n CPU: 0 PID: 1491 Comm: syz.1.28 Not tainted 6.6.0+ #3\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\n RIP: 0010:__list_add_valid_or_report+0xf7/0x130\n RSP: 0018:ff1100010dfb7b78 EFLAGS: 00010282\n RAX: 0000000000000000 RBX: ffffffffa57eee18 RCX: ffffffff97fc9817\n RDX: 0000000000040000 RSI: ffa0000002383000 RDI: 0000000000000001\n RBP: ffffffffa57eee28 R08: 0000000000000001 R09: ffe21c0021bf6f2c\n R10: 0000000000000001 R11: 6464615f7473696c R12: ffffffffa5e63100\n R13: ffffffffa57eee28 R14: ffffffffa57eee28 R15: ff1100010dfb7d48\n FS: 00007fb14398b640(0000) GS:ff11000119600000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000000 CR3: 000000010d096005 CR4: 0000000000773ef0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n PKRU: 80000000\n Call Trace:\n \n input_register_handler+0xb3/0x210\n mac_hid_start_emulation+0x1c5/0x290\n mac_hid_toggle_emumouse+0x20a/0x240\n proc_sys_call_handler+0x4c2/0x6e0\n new_sync_write+0x1b1/0x2d0\n vfs_write+0x709/0x950\n ksys_write+0x12a/0x250\n do_syscall_64+0x5a/0x110\n entry_SYSCALL_64_after_hwframe+0x78/0xe2\n\nThe WARNING occurs when two processes concurrently write to the mac-hid\nemulation sysctl, causing a race condition in mac_hid_toggle_emumouse().\nBoth processes read old_val=0, then both try to register the input handler,\nleading to a double list_add of the same handler.\n\n CPU0 CPU1\n ------------------------- -------------------------\n vfs_write() //write 1 vfs_write() //write 1\n proc_sys_write() proc_sys_write()\n mac_hid_toggle_emumouse() mac_hid_toggle_emumouse()\n old_val = *valp // old_val=0\n old_val = *valp // old_val=0\n mutex_lock_killable()\n proc_dointvec() // *valp=1\n mac_hid_start_emulation()\n input_register_handler()\n mutex_unlock()\n mutex_lock_killable()\n proc_dointvec()\n mac_hid_start_emulation()\n input_register_handler() //Trigger Warning\n mutex_unlock()\n\nFix this by moving the old_val read inside the mutex lock region.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "status": "affected", "versionType": "git", "lessThan": "d5f1d40fd342b589420de7508b4c748fcf28122e" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "status": "affected", "versionType": "git", "lessThan": "14c209835e47a87e6da94bb9401e570dcc14f31f" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "status": "affected", "versionType": "git", "lessThan": "583d36523f56d8e9ddfa0bec20743a6faefc9b74" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "status": "affected", "versionType": "git", "lessThan": "61abf8c3162d155b4fd0fb251f08557093363a0a" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "status": "affected", "versionType": "git", "lessThan": "230621ffdb361d15cd3ef92d8b4fa8d314f4fad4" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "status": "affected", "versionType": "git", "lessThan": "388391dd1cc567fcf0b372b63d414c119d23e911" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "status": "affected", "versionType": "git", "lessThan": "48a7d427eb65922b3f17fbe00e2bbc7cb9eac381" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "status": "affected", "versionType": "git", "lessThan": "1e4b207ffe54cf33a4b7a2912c4110f89c73bf3f" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.34", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.34" }, { "version": "5.10.248", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.198", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.160", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.120", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.63", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.17.13", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.17.*" }, { "version": "6.18.2", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "6.19", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }