CVE-2025-38126 (GCVE-0-2025-38126)

Vulnerability from cvelistv5 – Published: 2025-07-03 08:35 – Updated: 2026-05-11 21:21
VLAI
Title
net: stmmac: make sure that ptp_rate is not 0 before configuring timestamping
Summary
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: make sure that ptp_rate is not 0 before configuring timestamping The stmmac platform drivers that do not open-code the clk_ptp_rate value after having retrieved the default one from the device-tree can end up with 0 in clk_ptp_rate (as clk_get_rate can return 0). It will eventually propagate up to PTP initialization when bringing up the interface, leading to a divide by 0: Division by zero in kernel. CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.12.30-00001-g48313bd5768a #22 Hardware name: STM32 (Device Tree Support) Call trace: unwind_backtrace from show_stack+0x18/0x1c show_stack from dump_stack_lvl+0x6c/0x8c dump_stack_lvl from Ldiv0_64+0x8/0x18 Ldiv0_64 from stmmac_init_tstamp_counter+0x190/0x1a4 stmmac_init_tstamp_counter from stmmac_hw_setup+0xc1c/0x111c stmmac_hw_setup from __stmmac_open+0x18c/0x434 __stmmac_open from stmmac_open+0x3c/0xbc stmmac_open from __dev_open+0xf4/0x1ac __dev_open from __dev_change_flags+0x1cc/0x224 __dev_change_flags from dev_change_flags+0x24/0x60 dev_change_flags from ip_auto_config+0x2e8/0x11a0 ip_auto_config from do_one_initcall+0x84/0x33c do_one_initcall from kernel_init_freeable+0x1b8/0x214 kernel_init_freeable from kernel_init+0x24/0x140 kernel_init from ret_from_fork+0x14/0x28 Exception stack(0xe0815fb0 to 0xe0815ff8) Prevent this division by 0 by adding an explicit check and error log about the actual issue. While at it, remove the same check from stmmac_ptp_register, which then becomes duplicate
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 19d857c9038e5c07db8f8cc02b5ad0cd0098714f , < 32af9c289234990752281c805500dfe03c5b2b8f (git)
Affected: 19d857c9038e5c07db8f8cc02b5ad0cd0098714f , < b263088ee8ab14563817a8be3519af8e25225793 (git)
Affected: 19d857c9038e5c07db8f8cc02b5ad0cd0098714f , < bb033c6781ce1b0264c3993b767b4aa9021959c2 (git)
Affected: 19d857c9038e5c07db8f8cc02b5ad0cd0098714f , < 379cd990dfe752b38fcf46034698a9a150626c7a (git)
Affected: 19d857c9038e5c07db8f8cc02b5ad0cd0098714f , < 030ce919e114a111e83b7976ecb3597cefd33f26 (git)
Create a notification for this product.
Linux Linux Affected: 4.5
Unaffected: 0 , < 4.5 (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.94 , ≤ 6.6.* (semver)
Unaffected: 6.12.34 , ≤ 6.12.* (semver)
Unaffected: 6.15.3 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: make sure that ptp_rate is not 0 before configuring timestamping\n\nThe stmmac platform drivers that do not open-code the clk_ptp_rate value\nafter having retrieved the default one from the device-tree can end up\nwith 0 in clk_ptp_rate (as clk_get_rate can return 0). It will\neventually propagate up to PTP initialization when bringing up the\ninterface, leading to a divide by 0:\n\n Division by zero in kernel.\n CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.12.30-00001-g48313bd5768a #22\n Hardware name: STM32 (Device Tree Support)\n Call trace:\n  unwind_backtrace from show_stack+0x18/0x1c\n  show_stack from dump_stack_lvl+0x6c/0x8c\n  dump_stack_lvl from Ldiv0_64+0x8/0x18\n  Ldiv0_64 from stmmac_init_tstamp_counter+0x190/0x1a4\n  stmmac_init_tstamp_counter from stmmac_hw_setup+0xc1c/0x111c\n  stmmac_hw_setup from __stmmac_open+0x18c/0x434\n  __stmmac_open from stmmac_open+0x3c/0xbc\n  stmmac_open from __dev_open+0xf4/0x1ac\n  __dev_open from __dev_change_flags+0x1cc/0x224\n  __dev_change_flags from dev_change_flags+0x24/0x60\n  dev_change_flags from ip_auto_config+0x2e8/0x11a0\n  ip_auto_config from do_one_initcall+0x84/0x33c\n  do_one_initcall from kernel_init_freeable+0x1b8/0x214\n  kernel_init_freeable from kernel_init+0x24/0x140\n  kernel_init from ret_from_fork+0x14/0x28\n Exception stack(0xe0815fb0 to 0xe0815ff8)\n\nPrevent this division by 0 by adding an explicit check and error log\nabout the actual issue. While at it, remove the same check from\nstmmac_ptp_register, which then becomes duplicate"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38126\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-03T09:15:26.800\",\"lastModified\":\"2026-06-17T09:16:06.540\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: stmmac: make sure that ptp_rate is not 0 before configuring timestamping\\n\\nThe stmmac platform drivers that do not open-code the clk_ptp_rate value\\nafter having retrieved the default one from the device-tree can end up\\nwith 0 in clk_ptp_rate (as clk_get_rate can return 0). It will\\neventually propagate up to PTP initialization when bringing up the\\ninterface, leading to a divide by 0:\\n\\n Division by zero in kernel.\\n CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.12.30-00001-g48313bd5768a #22\\n Hardware name: STM32 (Device Tree Support)\\n Call trace:\\n  unwind_backtrace from show_stack+0x18/0x1c\\n  show_stack from dump_stack_lvl+0x6c/0x8c\\n  dump_stack_lvl from Ldiv0_64+0x8/0x18\\n  Ldiv0_64 from stmmac_init_tstamp_counter+0x190/0x1a4\\n  stmmac_init_tstamp_counter from stmmac_hw_setup+0xc1c/0x111c\\n  stmmac_hw_setup from __stmmac_open+0x18c/0x434\\n  __stmmac_open from stmmac_open+0x3c/0xbc\\n  stmmac_open from __dev_open+0xf4/0x1ac\\n  __dev_open from __dev_change_flags+0x1cc/0x224\\n  __dev_change_flags from dev_change_flags+0x24/0x60\\n  dev_change_flags from ip_auto_config+0x2e8/0x11a0\\n  ip_auto_config from do_one_initcall+0x84/0x33c\\n  do_one_initcall from kernel_init_freeable+0x1b8/0x214\\n  kernel_init_freeable from kernel_init+0x24/0x140\\n  kernel_init from ret_from_fork+0x14/0x28\\n Exception stack(0xe0815fb0 to 0xe0815ff8)\\n\\nPrevent this division by 0 by adding an explicit check and error log\\nabout the actual issue. While at it, remove the same check from\\nstmmac_ptp_register, which then becomes duplicate\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: stmmac: aseg\u00farese de que ptp_rate no sea 0 antes de configurar el sellado de tiempo. Los controladores de la plataforma stmmac que no incluyen en c\u00f3digo abierto el valor clk_ptp_rate tras obtener el predeterminado del \u00e1rbol de dispositivos pueden terminar con 0 en clk_ptp_rate (ya que clk_get_rate puede devolver 0). Esto se propagar\u00e1 hasta la inicializaci\u00f3n de PTP al iniciar la interfaz, lo que provocar\u00e1 una divisi\u00f3n por 0: Divisi\u00f3n por cero en el kernel. CPU: 1 UID: 0 PID: 1 Comm: swapper/0 No contaminado 6.12.30-00001-g48313bd5768a #22 Nombre del hardware: STM32 (Compatibilidad con \u00e1rbol de dispositivos) Rastreo de llamadas: unwind_backtrace from show_stack+0x18/0x1c show_stack from dump_stack_lvl+0x6c/0x8c dump_stack_lvl from Ldiv0_64+0x8/0x18 Ldiv0_64 from stmmac_init_tstamp_counter+0x190/0x1a4 stmmac_init_tstamp_counter from stmmac_hw_setup+0xc1c/0x111c stmmac_hw_setup from __stmmac_open+0x18c/0x434 __stmmac_open from stmmac_open+0x3c/0xbc stmmac_open from __dev_open+0xf4/0x1ac __dev_open from __dev_change_flags+0x1cc/0x224 __dev_change_flags from dev_change_flags+0x24/0x60 dev_change_flags from ip_auto_config+0x2e8/0x11a0 ip_auto_config from do_one_initcall+0x84/0x33c do_one_initcall from kernel_init_freeable+0x1b8/0x214 kernel_init_freeable from kernel_init+0x24/0x140 kernel_init from ret_from_fork+0x14/0x28 Exception stack(0xe0815fb0 to 0xe0815ff8) Evite esta divisi\u00f3n por 0 sumando Una comprobaci\u00f3n expl\u00edcita y un registro de errores sobre el problema. Mientras tanto, elimine la misma comprobaci\u00f3n de stmmac_ptp_register, que se convierte en un duplicado.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/ethernet/stmicro/stmmac/stmmac_main.c\",\"drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"19d857c9038e5c07db8f8cc02b5ad0cd0098714f\",\"lessThan\":\"32af9c289234990752281c805500dfe03c5b2b8f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"19d857c9038e5c07db8f8cc02b5ad0cd0098714f\",\"lessThan\":\"b263088ee8ab14563817a8be3519af8e25225793\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"19d857c9038e5c07db8f8cc02b5ad0cd0098714f\",\"lessThan\":\"bb033c6781ce1b0264c3993b767b4aa9021959c2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"19d857c9038e5c07db8f8cc02b5ad0cd0098714f\",\"lessThan\":\"379cd990dfe752b38fcf46034698a9a150626c7a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"19d857c9038e5c07db8f8cc02b5ad0cd0098714f\",\"lessThan\":\"030ce919e114a111e83b7976ecb3597cefd33f26\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/ethernet/stmicro/stmmac/stmmac_main.c\",\"drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.5\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.5\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.142\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.94\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.34\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15.3\",\"lessThanOrEqual\":\"6.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.16\",\"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}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-369\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.5\",\"versionEndExcluding\":\"6.1.142\",\"matchCriteriaId\":\"46958376-EFF7-4A53-A2EC-DBCD91DED7E6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.94\",\"matchCriteriaId\":\"304E3F01-7D7A-4908-994E-7F95C5C00B06\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.34\",\"matchCriteriaId\":\"4FFA54AA-CDFE-4591-BD07-72813D0948F4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.15.3\",\"matchCriteriaId\":\"0541C761-BD5E-4C1A-8432-83B375D7EB92\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/030ce919e114a111e83b7976ecb3597cefd33f26\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/32af9c289234990752281c805500dfe03c5b2b8f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/379cd990dfe752b38fcf46034698a9a150626c7a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b263088ee8ab14563817a8be3519af8e25225793\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bb033c6781ce1b0264c3993b767b4aa9021959c2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}"
  }
}


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