{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38126","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T04:51:23.986Z","datePublished":"2025-07-03T08:35:31.812Z","dateUpdated":"2026-05-11T21:21:45.819Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:21:45.819Z"},"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"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/stmicro/stmmac/stmmac_main.c","drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c"],"versions":[{"version":"19d857c9038e5c07db8f8cc02b5ad0cd0098714f","lessThan":"32af9c289234990752281c805500dfe03c5b2b8f","status":"affected","versionType":"git"},{"version":"19d857c9038e5c07db8f8cc02b5ad0cd0098714f","lessThan":"b263088ee8ab14563817a8be3519af8e25225793","status":"affected","versionType":"git"},{"version":"19d857c9038e5c07db8f8cc02b5ad0cd0098714f","lessThan":"bb033c6781ce1b0264c3993b767b4aa9021959c2","status":"affected","versionType":"git"},{"version":"19d857c9038e5c07db8f8cc02b5ad0cd0098714f","lessThan":"379cd990dfe752b38fcf46034698a9a150626c7a","status":"affected","versionType":"git"},{"version":"19d857c9038e5c07db8f8cc02b5ad0cd0098714f","lessThan":"030ce919e114a111e83b7976ecb3597cefd33f26","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/net/ethernet/stmicro/stmmac/stmmac_main.c","drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c"],"versions":[{"version":"4.5","status":"affected"},{"version":"0","lessThan":"4.5","status":"unaffected","versionType":"semver"},{"version":"6.1.142","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.94","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.34","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.15.3","lessThanOrEqual":"6.15.*","status":"unaffected","versionType":"semver"},{"version":"6.16","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":"4.5","versionEndExcluding":"6.1.142"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.6.94"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.12.34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.15.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.16"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/32af9c289234990752281c805500dfe03c5b2b8f"},{"url":"https://git.kernel.org/stable/c/b263088ee8ab14563817a8be3519af8e25225793"},{"url":"https://git.kernel.org/stable/c/bb033c6781ce1b0264c3993b767b4aa9021959c2"},{"url":"https://git.kernel.org/stable/c/379cd990dfe752b38fcf46034698a9a150626c7a"},{"url":"https://git.kernel.org/stable/c/030ce919e114a111e83b7976ecb3597cefd33f26"}],"title":"net: stmmac: make sure that ptp_rate is not 0 before configuring timestamping","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T17:34:24.171Z"}}]}}