{"cve":"CVE-2024-44981","nvd":{"published":"2024-09-04T20:15:07.533","modified":"2026-06-17T07:53:21.093","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nworkqueue: Fix UBSAN 'subtraction overflow' error in shift_and_mask()\n\nUBSAN reports the following 'subtraction overflow' error when booting\nin a virtual machine on Android:\n\n | Internal error: UBSAN: integer subtraction overflow: 00000000f2005515 [#1] PREEMPT SMP\n | Modules linked in:\n | CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.10.0-00006-g3cbe9e5abd46-dirty #4\n | Hardware name: linux,dummy-virt (DT)\n | pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n | pc : cancel_delayed_work+0x34/0x44\n | lr : cancel_delayed_work+0x2c/0x44\n | sp : ffff80008002ba60\n | x29: ffff80008002ba60 x28: 0000000000000000 x27: 0000000000000000\n | x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000\n | x23: 0000000000000000 x22: 0000000000000000 x21: ffff1f65014cd3c0\n | x20: ffffc0e84c9d0da0 x19: ffffc0e84cab3558 x18: ffff800080009058\n | x17: 00000000247ee1f8 x16: 00000000247ee1f8 x15: 00000000bdcb279d\n | x14: 0000000000000001 x13: 0000000000000075 x12: 00000a0000000000\n | x11: ffff1f6501499018 x10: 00984901651fffff x9 : ffff5e7cc35af000\n | x8 : 0000000000000001 x7 : 3d4d455453595342 x6 : 000000004e514553\n | x5 : ffff1f6501499265 x4 : ffff1f650ff60b10 x3 : 0000000000000620\n | x2 : ffff80008002ba78 x1 : 0000000000000000 x0 : 0000000000000000\n | Call trace:\n |  cancel_delayed_work+0x34/0x44\n |  deferred_probe_extend_timeout+0x20/0x70\n |  driver_register+0xa8/0x110\n |  __platform_driver_register+0x28/0x3c\n |  syscon_init+0x24/0x38\n |  do_one_initcall+0xe4/0x338\n |  do_initcall_level+0xac/0x178\n |  do_initcalls+0x5c/0xa0\n |  do_basic_setup+0x20/0x30\n |  kernel_init_freeable+0x8c/0xf8\n |  kernel_init+0x28/0x1b4\n |  ret_from_fork+0x10/0x20\n | Code: f9000fbf 97fffa2f 39400268 37100048 (d42aa2a0)\n | ---[ end trace 0000000000000000 ]---\n | Kernel panic - not syncing: UBSAN: integer subtraction overflow: Fatal exception\n\nThis is due to shift_and_mask() using a signed immediate to construct\nthe mask and being called with a shift of 31 (WORK_OFFQ_POOL_SHIFT) so\nthat it ends up decrementing from INT_MIN.\n\nUse an unsigned constant '1U' to generate the mask in shift_and_mask().","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-190"],"references":["https://git.kernel.org/stable/c/38f7e14519d39cf524ddc02d4caee9b337dad703","https://git.kernel.org/stable/c/90a6a844b2d9927d192758438a4ada33d8cd9de5"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:54:16.205165117+00:00"},"epss":{"cve":"CVE-2024-44981","score":0.00193,"percentile":0.09044,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}