{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43339", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:56.003Z", "datePublished": "2026-05-08T13:31:24.315Z", "dateUpdated": "2026-05-11T22:22:39.430Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:22:39.430Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: prevent possible UaF in addrconf_permanent_addr()\n\nThe mentioned helper try to warn the user about an exceptional\ncondition, but the message is delivered too late, accessing the ipv6\nafter its possible deletion.\n\nReorder the statement to avoid the possible UaF; while at it, place the\nwarning outside the idev->lock as it needs no protection."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/addrconf.c"], "versions": [{"version": "f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac", "lessThan": "eec49a33611f20336b357b3953df44f1a02049e8", "status": "affected", "versionType": "git"}, {"version": "f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac", "lessThan": "bacc7f31085c9820922f00bc7d79756ffa13123a", "status": "affected", "versionType": "git"}, {"version": "f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac", "lessThan": "7bfafa1b0cd582983ebec6bb20f0a435528fe567", "status": "affected", "versionType": "git"}, {"version": "f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac", "lessThan": "7d9f2f4aabd116ca68fbdab5d8fb8dac74c2ea1e", "status": "affected", "versionType": "git"}, {"version": "f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac", "lessThan": "25357b670afb5b517096da783abaa5cc4bf8359e", "status": "affected", "versionType": "git"}, {"version": "f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac", "lessThan": "3cd4efb5df72843dfac892d0b3c7a4a8bd926b65", "status": "affected", "versionType": "git"}, {"version": "f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac", "lessThan": "2d88ed7fa000e19c2dc0fa31b3a849e3f5bca5c1", "status": "affected", "versionType": "git"}, {"version": "f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac", "lessThan": "fd63f185979b047fb22a0dfc6bd94d0cab6a6a70", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/addrconf.c"], "versions": [{"version": "4.6", "status": "affected"}, {"version": "0", "lessThan": "4.6", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.168", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.81", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.12", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "4.6", "versionEndExcluding": "5.10.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.1.168"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.6.134"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.12.81"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.18.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.19.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/eec49a33611f20336b357b3953df44f1a02049e8"}, {"url": "https://git.kernel.org/stable/c/bacc7f31085c9820922f00bc7d79756ffa13123a"}, {"url": "https://git.kernel.org/stable/c/7bfafa1b0cd582983ebec6bb20f0a435528fe567"}, {"url": "https://git.kernel.org/stable/c/7d9f2f4aabd116ca68fbdab5d8fb8dac74c2ea1e"}, {"url": "https://git.kernel.org/stable/c/25357b670afb5b517096da783abaa5cc4bf8359e"}, {"url": "https://git.kernel.org/stable/c/3cd4efb5df72843dfac892d0b3c7a4a8bd926b65"}, {"url": "https://git.kernel.org/stable/c/2d88ed7fa000e19c2dc0fa31b3a849e3f5bca5c1"}, {"url": "https://git.kernel.org/stable/c/fd63f185979b047fb22a0dfc6bd94d0cab6a6a70"}], "title": "ipv6: prevent possible UaF in addrconf_permanent_addr()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "02FB4629-3CFA-4F2B-8699-141F5385D64A", "versionEndExcluding": "5.10.253", "versionStartIncluding": "4.6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "20DDB3E9-AABF-4107-ADB0-5362AA067045", "versionEndExcluding": "5.15.203", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E2DDDCA1-6DAB-4018-B920-8F045DDD8D3B", "versionEndExcluding": "6.1.168", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "F56F925B-BAF8-4F4B-B62F-1496AF19A307", "versionEndExcluding": "6.6.134", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6EF80433-B33B-43C5-8E64-0FA7B8DCE1BC", "versionEndExcluding": "6.12.81", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C9DF8BCE-36D3-475D-9D21-19E4F02F9029", "versionEndExcluding": "6.18.22", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0A2B9540-02D5-41B4-B16A-82AF66FD4F36", "versionEndExcluding": "6.19.12", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: prevent possible UaF in addrconf_permanent_addr()\n\nThe mentioned helper try to warn the user about an exceptional\ncondition, but the message is delivered too late, accessing the ipv6\nafter its possible deletion.\n\nReorder the statement to avoid the possible UaF; while at it, place the\nwarning outside the idev->lock as it needs no protection."}], "id": "CVE-2026-43339", "lastModified": "2026-05-15T19:50:34.110", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-08T14:16:43.777", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/25357b670afb5b517096da783abaa5cc4bf8359e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2d88ed7fa000e19c2dc0fa31b3a849e3f5bca5c1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3cd4efb5df72843dfac892d0b3c7a4a8bd926b65"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7bfafa1b0cd582983ebec6bb20f0a435528fe567"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7d9f2f4aabd116ca68fbdab5d8fb8dac74c2ea1e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bacc7f31085c9820922f00bc7d79756ffa13123a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/eec49a33611f20336b357b3953df44f1a02049e8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fd63f185979b047fb22a0dfc6bd94d0cab6a6a70"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ipv6: prevent possible UaF in addrconf_permanent_addr()", "id": "2468102", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468102"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's IPv6 networking subsystem. Specifically, a Use-after-Free (UaF) vulnerability exists within the `addrconf_permanent_addr()` function. This issue arises when the system attempts to access an IPv6 address after it has been freed, which could allow an attacker to cause a denial of service or potentially execute arbitrary code."], "name": "CVE-2026-43339", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43339\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43339\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43339.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac,eec49a33611f20336b357b3953df44f1a02049e8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac,bacc7f31085c9820922f00bc7d79756ffa13123a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac,7bfafa1b0cd582983ebec6bb20f0a435528fe567)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac,7d9f2f4aabd116ca68fbdab5d8fb8dac74c2ea1e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac,25357b670afb5b517096da783abaa5cc4bf8359e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac,3cd4efb5df72843dfac892d0b3c7a4a8bd926b65)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac,2d88ed7fa000e19c2dc0fa31b3a849e3f5bca5c1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac,fd63f185979b047fb22a0dfc6bd94d0cab6a6a70)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.19.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-08T20:45:16.336505+00:00", "updated": "2026-05-15T13:30:45.614762+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416", "CWE-825"]}