{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2020-1749 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2020-1749 is a high-severity vulnerability in Linux kernel, published on 9 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-1749 and fix it if it is affected.\n\nWhat it is: CVE-2020-1749 is a high-severity vulnerability in Linux kernel, published on 9 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-1749 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2020-1749/ (Markdown: https://insights.sbomify.com/CVE-2020-1749/index.md)","id":"CVE-2020-1749","markdown":"https://insights.sbomify.com/CVE-2020-1749/index.md","name":"CVE-2020-1749","record":{"aliases":["DEBIAN-CVE-2020-1749","GHSA-pw98-cq7c-645p","SUSE-SU-2020:0891-1","SUSE-SU-2020:1049-1","UBUNTU-CVE-2020-1749"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["data_read"],"network_reachable":"yes","non_default_config":true,"product_category":"Linux kernel IPsec","requires_auth":"none","summary":"An attacker can read unencrypted traffic in IPsec VXLAN/GENEVE tunnels over IPv6 due to incorrect kernel routing, compromising data confidentiality.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"linux_kernel","vendor":"linux"},{"product":"enterprise_linux","vendor":"redhat"},{"product":"enterprise_mrg","vendor":"redhat"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-319","name":"Cleartext Transmission of Sensitive Information"}],"description":"A flaw was found in the Linux kernel's implementation of some networking protocols in IPsec, such as VXLAN and GENEVE tunnels over IPv6. When an encrypted tunnel is created between two hosts, the kernel isn't correctly routing tunneled data over the encrypted link; rather sending the data unencrypted. This would allow anyone in between the two endpoints to read the traffic unencrypted. The main threat from this vulnerability is to data confidentiality.","ecosystems":["SUSE:Linux Enterprise Live Patching 12 SP4","SUSE:Linux Enterprise Live Patching 12 SP5","SUSE:Linux Enterprise Live Patching 15 SP1"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Information disclosure in kernel","id":"CVE-2020-1749","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel","redhat:enterprise_linux","redhat:enterprise_mrg"],"type":"information_disclosure","year":"2020"},"n_packages":4,"n_references":2,"next":{"headline":"Denial of service in machine-config-operator-container","id":"CVE-2020-1750"},"packages":[{"ecosystem":"SUSE:Linux Enterprise Live Patching 12 SP4","fixed":["2-2.1"],"introduced":["0"],"last_affected":[],"package":"kgraft-patch-SLE12-SP4_Update_12","purl":"pkg:rpm/suse/kgraft-patch-SLE12-SP4_Update_12\u0026distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4","source":"SUSE-SU-2020:0891-1"},{"ecosystem":"SUSE:Linux Enterprise Live Patching 12 SP5","fixed":["2-2.1"],"introduced":["0"],"last_affected":[],"package":"kgraft-patch-SLE12-SP5_Update_3","purl":"pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_3\u0026distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5","source":"SUSE-SU-2020:0891-1"},{"ecosystem":"SUSE:Linux Enterprise Live Patching 15 SP1","fixed":["2-2.2"],"introduced":["0"],"last_affected":[],"package":"kernel-livepatch-SLE15-SP1_Update_10","purl":"pkg:rpm/suse/kernel-livepatch-SLE15-SP1_Update_10\u0026distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP1","source":"SUSE-SU-2020:1049-1"},{"ecosystem":"SUSE:Linux Enterprise Live Patching 15 SP1","fixed":["2-2.1"],"introduced":["0"],"last_affected":[],"package":"kernel-livepatch-SLE15-SP1_Update_9","purl":"pkg:rpm/suse/kernel-livepatch-SLE15-SP1_Update_9\u0026distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP1","source":"SUSE-SU-2020:0891-1"}],"prev":{"headline":"Incorrect Authorization in WildFly Elytron","id":"CVE-2020-1748"},"products":["kernel"],"published":"2020-09-09","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["Linux Kernel"]},"summary":"An attacker can read unencrypted traffic in IPsec VXLAN/GENEVE tunnels over IPv6 due to incorrect kernel routing, compromising data confidentiality.","url":"https://insights.sbomify.com/CVE-2020-1749/"}