CVE-2026-43238

{"id": "CVE-2026-43238", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43238", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T15:31:06.549256Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "38a6f0865796e26fc38fff4858f681d9ae76fa0f", "lessThan": "59809fda4da7730cfe84a948033f47eb45db073d", "versionType": "git"}, {"status": "affected", "version": "38a6f0865796e26fc38fff4858f681d9ae76fa0f", "lessThan": "9c735a7d98c982a786b0db71eb6566ee00aaa04f", "versionType": "git"}, {"status": "affected", "version": "38a6f0865796e26fc38fff4858f681d9ae76fa0f", "lessThan": "015cebdfcb97b5347fb7f598ea712a281cb35840", "versionType": "git"}, {"status": "affected", "version": "38a6f0865796e26fc38fff4858f681d9ae76fa0f", "lessThan": "4ece5eb4836f8ff03b9004dc2430a7169f282851", "versionType": "git"}, {"status": "affected", "version": "38a6f0865796e26fc38fff4858f681d9ae76fa0f", "lessThan": "3c2b95b26860bd6f8e2310d31ea1200d3f8f173e", "versionType": "git"}, {"status": "affected", "version": "38a6f0865796e26fc38fff4858f681d9ae76fa0f", "lessThan": "be054cc66f739a9ba615dba9012a07fab8e7dd6f", "versionType": "git"}], "programFiles": ["net/sched/act_skbedit.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.19"}, {"status": "unaffected", "version": "0", "lessThan": "5.19", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.165", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.128", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.75", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.16", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.6", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/sched/act_skbedit.c"], "defaultStatus": "affected"}]}], "published": "2026-05-06T12:16:44.093", "references": [{"url": "https://git.kernel.org/stable/c/015cebdfcb97b5347fb7f598ea712a281cb35840", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3c2b95b26860bd6f8e2310d31ea1200d3f8f173e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4ece5eb4836f8ff03b9004dc2430a7169f282851", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/59809fda4da7730cfe84a948033f47eb45db073d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9c735a7d98c982a786b0db71eb6566ee00aaa04f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/be054cc66f739a9ba615dba9012a07fab8e7dd6f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-369"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_skbedit: fix divide-by-zero in tcf_skbedit_hash()\n\nCommit 38a6f0865796 (\"net: sched: support hash selecting tx queue\")\nadded SKBEDIT_F_TXQ_SKBHASH support. The inclusive range size is\ncomputed as:\n\nmapping_mod = queue_mapping_max - queue_mapping + 1;\n\nThe range size can be 65536 when the requested range covers all possible\nu16 queue IDs (e.g. queue_mapping=0 and queue_mapping_max=U16_MAX).\nThat value cannot be represented in a u16 and previously wrapped to 0,\nso tcf_skbedit_hash() could trigger a divide-by-zero:\n\nqueue_mapping += skb_get_hash(skb) % params->mapping_mod;\n\nCompute mapping_mod in a wider type and reject ranges larger than U16_MAX\nto prevent params->mapping_mod from becoming 0 and avoid the crash."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet/sched: act_skbedit: correcci\u00f3n de divisi\u00f3n por cero en tcf_skbedit_hash()\n\nEl commit 38a6f0865796 (\u2019net: sched: support hash selecting tx queue\u2019) a\u00f1adi\u00f3 soporte para SKBEDIT_F_TXQ_SKBHASH. El tama\u00f1o del rango inclusivo se calcula como:\n\nmapping_mod = queue_mapping_max - queue_mapping + 1;\n\nEl tama\u00f1o del rango puede ser 65536 cuando el rango solicitado cubre todos los posibles IDs de cola u16 (p. ej., queue_mapping=0 y queue_mapping_max=U16_MAX). Ese valor no puede ser representado en un u16 y anteriormente se desbordaba a 0, por lo que tcf_skbedit_hash() podr\u00eda desencadenar una divisi\u00f3n por cero:\n\nqueue_mapping += skb_get_hash(skb) % params -> mapping_mod;\n\nCalcular mapping_mod en un tipo m\u00e1s amplio y rechazar rangos mayores que U16_MAX para evitar que params -> mapping_mod se convierta en 0 y evitar el fallo."}], "lastModified": "2026-11-11T20:10:00.273", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3DD2C202-0D8D-4C7D-A980-CFCF610F7707", "versionEndExcluding": "6.1.165", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2", "versionEndExcluding": "6.6.128", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2", "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B", "versionEndExcluding": "6.18.16", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67", "versionEndExcluding": "6.19.6", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}