{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-88806 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-88806 is a high-severity memory corruption vulnerability in x.org libX11, published on 21 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-88806 and fix it if it is affected.\n\nWhat it is: CVE-2026-88806 is a high-severity memory corruption vulnerability in x.org libX11, published on 21 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-88806 in the wild and no public exploit code.\n\nAffected product: x.org libX11. 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-2026-88806/ (Markdown: https://insights.sbomify.com/CVE-2026-88806/index.md)","id":"CVE-2026-88806","markdown":"https://insights.sbomify.com/CVE-2026-88806/index.md","name":"CVE-2026-88806","record":{"aliases":["ALPINE-CVE-2026-88806","ALSA-2026:89730","ALSA-2026:91365","ALSA-2026:91366","AZL-103388","BELL-CVE-2026-88806","CLSA-2026-1792810382","CLSA-2026-1792810818","DEBIAN-CVE-2026-88806","ECHO-4ee4-286e-3447","GHSA-xrgw-w7v2-3qp8","RLSA-2026:89730","ROOT-OS-DEBIAN-12-CVE-2026-88806","ROOT-OS-DEBIAN-13-CVE-2026-88806","SUSE-SU-2026:23885-1","SUSE-SU-2026:23899-1","UBUNTU-CVE-2026-88806","openSUSE-SU-2026:11833-1","openSUSE-SU-2026:21908-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"X11 client library","requires_auth":"none","summary":"A malicious X server can trigger a heap-based buffer overflow in libX11, potentially allowing arbitrary code execution on the client system.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"suse","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-122","name":"Heap-based Buffer Overflow"}],"description":"A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.","ecosystems":["AlmaLinux:10","AlmaLinux:8","AlmaLinux:9","Rocky Linux:8","SUSE:Linux Enterprise Server 16.0","SUSE:Linux Enterprise Server for SAP applications 16.0","SUSE:Linux Micro 6.2","openSUSE:Leap 16.0","openSUSE:Tumbleweed"],"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":"libX11 XkbGetMap Reply Heap-based Buffer Overflow","id":"CVE-2026-88806","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":18,"n_references":1,"next":{"headline":"libXrender RenderQueryPictFormats Reply Heap-based Buffer Overflow","id":"CVE-2026-88807"},"packages":[{"ecosystem":"AlmaLinux:10","fixed":["1.8.10-1.el10_2.1"],"introduced":["0"],"last_affected":[],"package":"libX11","purl":"pkg:rpm/almalinux/libX11","source":"ALSA-2026:91366"},{"ecosystem":"AlmaLinux:10","fixed":["1.8.10-1.el10_2.1"],"introduced":["0"],"last_affected":[],"package":"libX11-common","purl":"pkg:rpm/almalinux/libX11-common","source":"ALSA-2026:91366"},{"ecosystem":"AlmaLinux:10","fixed":["1.8.10-1.el10_2.1"],"introduced":["0"],"last_affected":[],"package":"libX11-devel","purl":"pkg:rpm/almalinux/libX11-devel","source":"ALSA-2026:91366"},{"ecosystem":"AlmaLinux:10","fixed":["1.8.10-1.el10_2.1"],"introduced":["0"],"last_affected":[],"package":"libX11-xcb","purl":"pkg:rpm/almalinux/libX11-xcb","source":"ALSA-2026:91366"},{"ecosystem":"AlmaLinux:8","fixed":["1.6.8-10.el8_10"],"introduced":["0"],"last_affected":[],"package":"libX11","purl":"pkg:rpm/almalinux/libX11","source":"ALSA-2026:89730"},{"ecosystem":"AlmaLinux:8","fixed":["1.6.8-10.el8_10"],"introduced":["0"],"last_affected":[],"package":"libX11-common","purl":"pkg:rpm/almalinux/libX11-common","source":"ALSA-2026:89730"},{"ecosystem":"AlmaLinux:8","fixed":["1.6.8-10.el8_10"],"introduced":["0"],"last_affected":[],"package":"libX11-devel","purl":"pkg:rpm/almalinux/libX11-devel","source":"ALSA-2026:89730"},{"ecosystem":"AlmaLinux:8","fixed":["1.6.8-10.el8_10"],"introduced":["0"],"last_affected":[],"package":"libX11-xcb","purl":"pkg:rpm/almalinux/libX11-xcb","source":"ALSA-2026:89730"},{"ecosystem":"AlmaLinux:9","fixed":["1.8.12-1.el9_8.1"],"introduced":["0"],"last_affected":[],"package":"libX11","purl":"pkg:rpm/almalinux/libX11","source":"ALSA-2026:91365"},{"ecosystem":"AlmaLinux:9","fixed":["1.8.12-1.el9_8.1"],"introduced":["0"],"last_affected":[],"package":"libX11-common","purl":"pkg:rpm/almalinux/libX11-common","source":"ALSA-2026:91365"},{"ecosystem":"AlmaLinux:9","fixed":["1.8.12-1.el9_8.1"],"introduced":["0"],"last_affected":[],"package":"libX11-devel","purl":"pkg:rpm/almalinux/libX11-devel","source":"ALSA-2026:91365"},{"ecosystem":"AlmaLinux:9","fixed":["1.8.12-1.el9_8.1"],"introduced":["0"],"last_affected":[],"package":"libX11-xcb","purl":"pkg:rpm/almalinux/libX11-xcb","source":"ALSA-2026:91365"},{"ecosystem":"Rocky Linux:8","fixed":["0:1.6.8-10.el8_10"],"introduced":["0"],"last_affected":[],"package":"libX11","purl":"pkg:rpm/rocky-linux/libX11?distro=rocky-linux-8\u0026epoch=0","source":"RLSA-2026:89730"},{"ecosystem":"SUSE:Linux Enterprise Server 16.0","fixed":["1.8.10-160000.4.1"],"introduced":["0"],"last_affected":[],"package":"libX11","purl":"pkg:rpm/suse/libX11\u0026distro=SUSE%20Linux%20Enterprise%20Server%2016.0","source":"SUSE-SU-2026:23899-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP applications 16.0","fixed":["1.8.10-160000.4.1"],"introduced":["0"],"last_affected":[],"package":"libX11","purl":"pkg:rpm/suse/libX11\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0","source":"SUSE-SU-2026:23899-1"},{"ecosystem":"SUSE:Linux Micro 6.2","fixed":["1.8.10-160000.4.1"],"introduced":["0"],"last_affected":[],"package":"libX11","purl":"pkg:rpm/suse/libX11\u0026distro=SUSE%20Linux%20Micro%206.2","source":"SUSE-SU-2026:23885-1"},{"ecosystem":"openSUSE:Leap 16.0","fixed":["1.8.10-160000.4.1"],"introduced":["0"],"last_affected":[],"package":"libX11","purl":"pkg:rpm/opensuse/libX11\u0026distro=openSUSE%20Leap%2016.0","source":"openSUSE-SU-2026:21908-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["1.8.13-2.1"],"introduced":["0"],"last_affected":[],"package":"libX11","purl":"pkg:rpm/opensuse/libX11\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:11833-1"}],"prev":{"headline":"Session Not Revoked Server-Side on Logout in Rancher","id":"CVE-2026-88805"},"products":["libX11"],"published":"2026-09-21","related":[],"sources":[{"class":"attribution","licence":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"BSD","name":"Rocky Linux","prefix":"RLSA"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-22","vendors":["x.org"]},"summary":"A malicious X server can trigger a heap-based buffer overflow in libX11, potentially allowing arbitrary code execution on the client system.","url":"https://insights.sbomify.com/CVE-2026-88806/"}