{"id":"CVE-2024-49977","state":"PUBLISHED","title":"net: stmmac: Fix zero-division error when disabling tc cbs","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: Fix zero-division error when disabling tc cbs\n\nThe commit b8c43360f6e4 (\"net: stmmac: No need to calculate speed divider\nwhen offload is disabled\") allows the \"port_transmit_rate_kbps\" to be\nset to a value of 0, which is then passed to the \"div_s64\" function when\ntc-cbs is disabled. This leads to a zero-division error.\n\nWhen tc-cbs is disabled, the idleslope, sendslope, and credit values the\ncredit values are not required to be configured. Therefore, adding a return\nstatement after setting the txQ mode to DCB when tc-cbs is disabled would\nprevent a zero-division error.","publishedAt":"2024-10-21T18:02:24.480Z","updatedAt":"2026-10-15T00:55:24.051Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b4bca4722fda928810d024350493990de39f1e40","status":"affected","lessThan":"e33fe25b1efe4f2e6a5858786dbc82ae4c44ed4c","versionType":"git"},{"version":"2145583e5995598f50d66f8710c86bb1e910ac46","status":"affected","lessThan":"b0da9504a528f05f97d926b4db74ff21917a33e9","versionType":"git"},{"version":"521d42a1c24d638241220d4b9fa7e7a0ed02b88e","status":"affected","lessThan":"5d43e1ad4567d67af2b42d3ab7c14152ffed25c6","versionType":"git"},{"version":"a71b686418ee6bcb6d6365f7f6d838d9874d9c64","status":"affected","lessThan":"03582f4752427f60817d896f1a827aff772bd31e","versionType":"git"},{"version":"b8c43360f6e424131fa81d3ba8792ad8ff25a09e","status":"affected","lessThan":"e297a2bf56d12fd7f91a0c209eb6ea84361f3368","versionType":"git"},{"version":"b8c43360f6e424131fa81d3ba8792ad8ff25a09e","status":"affected","lessThan":"837d9df9c0792902710149d1a5e0991520af0f93","versionType":"git"},{"version":"b8c43360f6e424131fa81d3ba8792ad8ff25a09e","status":"affected","lessThan":"675faf5a14c14a2be0b870db30a70764df81e2df","versionType":"git"},{"version":"f01782804147a8c21f481b3342c83422c041d2c0","status":"affected","versionType":"git"},{"version":"5.10.221","status":"affected","lessThan":"5.10.227","versionType":"semver"},{"version":"5.15.162","status":"affected","lessThan":"5.15.168","versionType":"semver"},{"version":"6.1.96","status":"affected","lessThan":"6.1.113","versionType":"semver"},{"version":"6.6.36","status":"affected","lessThan":"6.6.55","versionType":"semver"},{"version":"6.9.7","status":"affected","lessThan":"6.10","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"5.10.227","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.168","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.113","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.55","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.14","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11.3","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c"]}],"references":["https://git.kernel.org/stable/c/e33fe25b1efe4f2e6a5858786dbc82ae4c44ed4c","https://git.kernel.org/stable/c/b0da9504a528f05f97d926b4db74ff21917a33e9","https://git.kernel.org/stable/c/5d43e1ad4567d67af2b42d3ab7c14152ffed25c6","https://git.kernel.org/stable/c/03582f4752427f60817d896f1a827aff772bd31e","https://git.kernel.org/stable/c/e297a2bf56d12fd7f91a0c209eb6ea84361f3368","https://git.kernel.org/stable/c/837d9df9c0792902710149d1a5e0991520af0f93","https://git.kernel.org/stable/c/675faf5a14c14a2be0b870db30a70764df81e2df","https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html","https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html","https://cert-portal.siemens.com/productcert/html/ssa-265688.html","https://cert-portal.siemens.com/productcert/html/ssa-355557.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:56.516Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/49xxx/CVE-2024-49977.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-49977","state":"PUBLISHED","datePublished":"2024-10-21T18:02:24.480Z","dateUpdated":"2026-10-15T00:55:24.051Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-10-21T12:17:06.052Z"},"containers":{"cna":{"title":"net: stmmac: Fix zero-division error when disabling tc cbs","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: Fix zero-division error when disabling tc cbs\n\nThe commit b8c43360f6e4 (\"net: stmmac: No need to calculate speed divider\nwhen offload is disabled\") allows the \"port_transmit_rate_kbps\" to be\nset to a value of 0, which is then passed to the \"div_s64\" function when\ntc-cbs is disabled. This leads to a zero-division error.\n\nWhen tc-cbs is disabled, the idleslope, sendslope, and credit values the\ncredit values are not required to be configured. Therefore, adding a return\nstatement after setting the txQ mode to DCB when tc-cbs is disabled would\nprevent a zero-division 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