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CVE-2024-44981 (GCVE-0-2024-44981)

Vulnerability from cvelistv5 – Published: 2024-09-04 19:54 – Updated: 2026-05-11 20:33
VLAI
Title
workqueue: Fix UBSAN 'subtraction overflow' error in shift_and_mask()
Summary
In the Linux kernel, the following vulnerability has been resolved: workqueue: Fix UBSAN 'subtraction overflow' error in shift_and_mask() UBSAN reports the following 'subtraction overflow' error when booting in a virtual machine on Android: | Internal error: UBSAN: integer subtraction overflow: 00000000f2005515 [#1] PREEMPT SMP | Modules linked in: | CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.10.0-00006-g3cbe9e5abd46-dirty #4 | Hardware name: linux,dummy-virt (DT) | pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) | pc : cancel_delayed_work+0x34/0x44 | lr : cancel_delayed_work+0x2c/0x44 | sp : ffff80008002ba60 | x29: ffff80008002ba60 x28: 0000000000000000 x27: 0000000000000000 | x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 | x23: 0000000000000000 x22: 0000000000000000 x21: ffff1f65014cd3c0 | x20: ffffc0e84c9d0da0 x19: ffffc0e84cab3558 x18: ffff800080009058 | x17: 00000000247ee1f8 x16: 00000000247ee1f8 x15: 00000000bdcb279d | x14: 0000000000000001 x13: 0000000000000075 x12: 00000a0000000000 | x11: ffff1f6501499018 x10: 00984901651fffff x9 : ffff5e7cc35af000 | x8 : 0000000000000001 x7 : 3d4d455453595342 x6 : 000000004e514553 | x5 : ffff1f6501499265 x4 : ffff1f650ff60b10 x3 : 0000000000000620 | x2 : ffff80008002ba78 x1 : 0000000000000000 x0 : 0000000000000000 | Call trace: | cancel_delayed_work+0x34/0x44 | deferred_probe_extend_timeout+0x20/0x70 | driver_register+0xa8/0x110 | __platform_driver_register+0x28/0x3c | syscon_init+0x24/0x38 | do_one_initcall+0xe4/0x338 | do_initcall_level+0xac/0x178 | do_initcalls+0x5c/0xa0 | do_basic_setup+0x20/0x30 | kernel_init_freeable+0x8c/0xf8 | kernel_init+0x28/0x1b4 | ret_from_fork+0x10/0x20 | Code: f9000fbf 97fffa2f 39400268 37100048 (d42aa2a0) | ---[ end trace 0000000000000000 ]--- | Kernel panic - not syncing: UBSAN: integer subtraction overflow: Fatal exception This is due to shift_and_mask() using a signed immediate to construct the mask and being called with a shift of 31 (WORK_OFFQ_POOL_SHIFT) so that it ends up decrementing from INT_MIN. Use an unsigned constant '1U' to generate the mask in shift_and_mask().
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:18 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1211f3b21c2aa0d22d8d7f050e3a5930a91cd0e4 , < 90a6a844b2d9927d192758438a4ada33d8cd9de5 (git)
Affected: 1211f3b21c2aa0d22d8d7f050e3a5930a91cd0e4 , < 38f7e14519d39cf524ddc02d4caee9b337dad703 (git)
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Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 6.10.7 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nworkqueue: Fix UBSAN \u0027subtraction overflow\u0027 error in shift_and_mask()\\n\\nUBSAN reports the following \u0027subtraction overflow\u0027 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 \u00271U\u0027 to generate the mask in shift_and_mask().\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: workqueue: Se corrige el error de \u0027desbordamiento de sustracci\\u00f3n\u0027 de UBSAN en shift_and_mask() UBSAN informa el siguiente error de \u0027desbordamiento de sustracci\\u00f3n\u0027 al arrancar en una m\\u00e1quina virtual en Android: | Error interno: UBSAN: desbordamiento de sustracci\\u00f3n de enteros: 00000000f2005515 [#1] PREEMPT SMP | M\\u00f3dulos vinculados en: | CPU: 0 PID: 1 Comm: swapper/0 No contaminado 6.10.0-00006-g3cbe9e5abd46-dirty #4 | Nombre del hardware: linux,dummy-virt (DT) | pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) | pc : cancel_delayed_work+0x34/0x44 | lr : cancelar_trabajo_retrasado+0x2c/0x44 | sp : ffff80008002ba60 | x29: ffff80008002ba60 x28: 0000000000000000 x27: 0000000000000000 | x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 | x23: 0000000000000000 x22: 0000000000000000 x21: ffff1f65014cd3c0 | x20: ffffc0e84c9d0da0 x19: ffffc0e84cab3558 x18: ffff800080009058 | x17: 00000000247ee1f8 x16: 00000000247ee1f8 x15: 00000000bdcb279d | x14: 0000000000000001 x13: 0000000000000075 x12: 00000a0000000000 | x11: ffff1f6501499018 x10: 00984901651fffff x9 : ffff5e7cc35af000 | x8 : 0000000000000001 x7 : 3d4d455453595342 x6 : 000000004e514553 | x5 : ffff1f6501499265 x4 : ffff1f650ff60b10 x3 : 0000000000000620 | x2 : ffff80008002ba78 x1 : 0000000000000000 x0 : 0000000000000000 | Rastreo de llamadas: | cancel_delayed_work+0x34/0x44 | deferred_probe_extend_timeout+0x20/0x70 | driver_register+0xa8/0x110 | __platform_driver_register+0x28/0x3c | syscon_init+0x24/0x38 | hacer_una_initcall+0xe4/0x338 | hacer_initcall_level+0xac/0x178 | hacer_initcalls+0x5c/0xa0 | hacer_configuraci\\u00f3n_b\\u00e1sica+0x20/0x30 | kernel_init_freeable+0x8c/0xf8 | kernel_init+0x28/0x1b4 | ret_from_fork+0x10/0x20 | C\\u00f3digo: f9000fbf 97fffa2f 39400268 37100048 (d42aa2a0) | ---[ fin de seguimiento 000000000000000 ]--- | P\\u00e1nico del n\\u00facleo: no se sincroniza: UBSAN: desbordamiento de sustracci\\u00f3n de enteros: excepci\\u00f3n fatal Esto se debe a que shift_and_mask() usa una funci\\u00f3n inmediata con signo para construir la m\\u00e1scara y se la llama con un desplazamiento de 31 (WORK_OFFQ_POOL_SHIFT), por lo que termina disminuyendo desde INT_MIN. Use una constante sin signo \u00271U\u0027 para generar la m\\u00e1scara en shift_and_mask().\"}]",
      "id": "CVE-2024-44981",
      "lastModified": "2024-09-05T17:54:19.377",
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      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-190\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-44981\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-09-04T20:15:07.533\",\"lastModified\":\"2026-06-17T07:53:21.093\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nworkqueue: Fix UBSAN \u0027subtraction overflow\u0027 error in shift_and_mask()\\n\\nUBSAN reports the following \u0027subtraction overflow\u0027 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 \u00271U\u0027 to generate the mask in shift_and_mask().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: workqueue: Se corrige el error de \u0027desbordamiento de sustracci\u00f3n\u0027 de UBSAN en shift_and_mask() UBSAN informa el siguiente error de \u0027desbordamiento de sustracci\u00f3n\u0027 al arrancar en una m\u00e1quina virtual en Android: | Error interno: UBSAN: desbordamiento de sustracci\u00f3n de enteros: 00000000f2005515 [#1] PREEMPT SMP | M\u00f3dulos vinculados en: | CPU: 0 PID: 1 Comm: swapper/0 No contaminado 6.10.0-00006-g3cbe9e5abd46-dirty #4 | Nombre del hardware: linux,dummy-virt (DT) | pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) | pc : cancel_delayed_work+0x34/0x44 | lr : cancelar_trabajo_retrasado+0x2c/0x44 | sp : ffff80008002ba60 | x29: ffff80008002ba60 x28: 0000000000000000 x27: 0000000000000000 | x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 | x23: 0000000000000000 x22: 0000000000000000 x21: ffff1f65014cd3c0 | x20: ffffc0e84c9d0da0 x19: ffffc0e84cab3558 x18: ffff800080009058 | x17: 00000000247ee1f8 x16: 00000000247ee1f8 x15: 00000000bdcb279d | x14: 0000000000000001 x13: 0000000000000075 x12: 00000a0000000000 | x11: ffff1f6501499018 x10: 00984901651fffff x9 : ffff5e7cc35af000 | x8 : 0000000000000001 x7 : 3d4d455453595342 x6 : 000000004e514553 | x5 : ffff1f6501499265 x4 : ffff1f650ff60b10 x3 : 0000000000000620 | x2 : ffff80008002ba78 x1 : 0000000000000000 x0 : 0000000000000000 | Rastreo de llamadas: | cancel_delayed_work+0x34/0x44 | deferred_probe_extend_timeout+0x20/0x70 | driver_register+0xa8/0x110 | __platform_driver_register+0x28/0x3c | syscon_init+0x24/0x38 | hacer_una_initcall+0xe4/0x338 | hacer_initcall_level+0xac/0x178 | hacer_initcalls+0x5c/0xa0 | hacer_configuraci\u00f3n_b\u00e1sica+0x20/0x30 | kernel_init_freeable+0x8c/0xf8 | kernel_init+0x28/0x1b4 | ret_from_fork+0x10/0x20 | C\u00f3digo: f9000fbf 97fffa2f 39400268 37100048 (d42aa2a0) | ---[ fin de seguimiento 000000000000000 ]--- | P\u00e1nico del n\u00facleo: no se sincroniza: UBSAN: desbordamiento de sustracci\u00f3n de enteros: excepci\u00f3n fatal Esto se debe a que shift_and_mask() usa una funci\u00f3n inmediata con signo para construir la m\u00e1scara y se la llama con un desplazamiento de 31 (WORK_OFFQ_POOL_SHIFT), por lo que termina disminuyendo desde INT_MIN. Use una constante sin signo \u00271U\u0027 para generar la m\u00e1scara en shift_and_mask().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"kernel/workqueue.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1211f3b21c2aa0d22d8d7f050e3a5930a91cd0e4\",\"lessThan\":\"90a6a844b2d9927d192758438a4ada33d8cd9de5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1211f3b21c2aa0d22d8d7f050e3a5930a91cd0e4\",\"lessThan\":\"38f7e14519d39cf524ddc02d4caee9b337dad703\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"kernel/workqueue.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.10.7\",\"lessThanOrEqual\":\"6.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.11\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-10T15:18:14.996929Z\",\"id\":\"CVE-2024-44981\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-190\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.10\",\"versionEndExcluding\":\"6.10.7\",\"matchCriteriaId\":\"E55C1263-DF43-41EF-8DA8-2BA68DF4FFFD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"8B3CE743-2126-47A3-8B7C-822B502CF119\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4DEB27E7-30AA-45CC-8934-B89263EF3551\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"E0005AEF-856E-47EB-BFE4-90C46899394D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"39889A68-6D34-47A6-82FC-CD0BF23D6754\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/38f7e14519d39cf524ddc02d4caee9b337dad703\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/90a6a844b2d9927d192758438a4ada33d8cd9de5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T14:26:24+00:00",
      "cve": "CVE-2024-44981",
      "id": "CVE-2024-44981",
      "initial_release_date": "2024-09-04T00:00:00+00:00",
      "product_status:known_affected": "42",
      "product_status:known_not_affected": "156",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: workqueue: Fix UBSAN \u0027subtraction overflow\u0027 error in shift_and_mask()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-44981.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-09T00:32:47Z",
      "cve": "CVE-2024-44981",
      "id": "CVE-2024-44981",
      "initial_release_date": "2024-09-05T02:46:45Z",
      "product_status:first_fixed": "114",
      "product_status:known_not_affected": "393",
      "product_status:recommended": "11",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-44981",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-44981.json",
      "version": "20"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-44981\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:18:14.996929Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:19.724Z\"}}], \"cna\": {\"title\": \"workqueue: Fix UBSAN \u0027subtraction overflow\u0027 error in shift_and_mask()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"1211f3b21c2aa0d22d8d7f050e3a5930a91cd0e4\", \"lessThan\": \"90a6a844b2d9927d192758438a4ada33d8cd9de5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1211f3b21c2aa0d22d8d7f050e3a5930a91cd0e4\", \"lessThan\": \"38f7e14519d39cf524ddc02d4caee9b337dad703\", \"versionType\": \"git\"}], \"programFiles\": [\"kernel/workqueue.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.10.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"kernel/workqueue.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/90a6a844b2d9927d192758438a4ada33d8cd9de5\"}, {\"url\": \"https://git.kernel.org/stable/c/38f7e14519d39cf524ddc02d4caee9b337dad703\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nworkqueue: Fix UBSAN \u0027subtraction overflow\u0027 error in shift_and_mask()\\n\\nUBSAN reports the following \u0027subtraction overflow\u0027 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 \u00271U\u0027 to generate the mask in shift_and_mask().\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.7\", \"versionStartIncluding\": \"6.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11\", \"versionStartIncluding\": \"6.10\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:33:09.567Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-44981\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:33:09.567Z\", \"dateReserved\": \"2024-08-21T05:34:56.670Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-09-04T19:54:31.505Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.