{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-68367", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T14:48:05.309Z", "datePublished": "2025-12-24T10:32:54.084Z", "dateUpdated": "2026-05-11T21:51:50.117Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:51:50.117Z" }, "descriptions": [ { "lang": "en", "value": "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": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/macintosh/mac_hid.c" ], "versions": [ { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "lessThan": "d5f1d40fd342b589420de7508b4c748fcf28122e", "status": "affected", "versionType": "git" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "lessThan": "14c209835e47a87e6da94bb9401e570dcc14f31f", "status": "affected", "versionType": "git" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "lessThan": "583d36523f56d8e9ddfa0bec20743a6faefc9b74", "status": "affected", "versionType": "git" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "lessThan": "61abf8c3162d155b4fd0fb251f08557093363a0a", "status": "affected", "versionType": "git" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "lessThan": "230621ffdb361d15cd3ef92d8b4fa8d314f4fad4", "status": "affected", "versionType": "git" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "lessThan": "388391dd1cc567fcf0b372b63d414c119d23e911", "status": "affected", "versionType": "git" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "lessThan": "48a7d427eb65922b3f17fbe00e2bbc7cb9eac381", "status": "affected", "versionType": "git" }, { "version": "99b089c3c38a83ebaeb1cc4584ddcde841626467", "lessThan": "1e4b207ffe54cf33a4b7a2912c4110f89c73bf3f", "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/macintosh/mac_hid.c" ], "versions": [ { "version": "2.6.34", "status": "affected" }, { "version": "0", "lessThan": "2.6.34", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.248", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.198", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.160", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.120", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.63", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.13", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.2", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19", "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": "2.6.34", "versionEndExcluding": "5.10.248" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "5.15.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.1.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.6.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.12.63" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.17.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.18.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d5f1d40fd342b589420de7508b4c748fcf28122e" }, { "url": "https://git.kernel.org/stable/c/14c209835e47a87e6da94bb9401e570dcc14f31f" }, { "url": "https://git.kernel.org/stable/c/583d36523f56d8e9ddfa0bec20743a6faefc9b74" }, { "url": "https://git.kernel.org/stable/c/61abf8c3162d155b4fd0fb251f08557093363a0a" }, { "url": "https://git.kernel.org/stable/c/230621ffdb361d15cd3ef92d8b4fa8d314f4fad4" }, { "url": "https://git.kernel.org/stable/c/388391dd1cc567fcf0b372b63d414c119d23e911" }, { "url": "https://git.kernel.org/stable/c/48a7d427eb65922b3f17fbe00e2bbc7cb9eac381" }, { "url": "https://git.kernel.org/stable/c/1e4b207ffe54cf33a4b7a2912c4110f89c73bf3f" } ], "title": "macintosh/mac_hid: fix race condition in mac_hid_toggle_emumouse", "x_generator": { "engine": "bippy-1.2.0" } } } }