{"id":"CVE-2026-23421","title":"drm/xe/configfs: Free ctx_restore_mid_bb in release","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/configfs: Free ctx_restore_mid_bb in release\n\nctx_restore_mid_bb memory is allocated in wa_bb_store(), but\nxe_config_device_release() only frees ctx_restore_post…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= b30d5de3d40c3fa642079bac0d91f17091c5f877 < 7f971dfd48983074adc7bbcea3ee95ce7aad47cb","Linux >= b30d5de3d40c3fa642079bac0d91f17091c5f877 < 3557359ea3df32430ea7c30f7a708ca9a91d7e0e","Linux >= b30d5de3d40c3fa642079bac0d91f17091c5f877 < e377182f0266f46f02d01838e6bde67b9dac0d66","Linux 6.18"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T21:30:30.522388Z"},"published":"2026-04-03","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:33:46.385Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23421","references":[{"url":"https://git.kernel.org/stable/c/7f971dfd48983074adc7bbcea3ee95ce7aad47cb"},{"url":"https://git.kernel.org/stable/c/3557359ea3df32430ea7c30f7a708ca9a91d7e0e"},{"url":"https://git.kernel.org/stable/c/e377182f0266f46f02d01838e6bde67b9dac0d66"}],"tags":["cve.org"],"epss":0.00117,"epssPercentile":0.01686,"ingestedAt":"2026-11-05T22:38:32.132Z","slug":"CVE-2026-23421","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/configfs: Free ctx_restore_mid_bb in release\n\nctx_restore_mid_bb memory is allocated in wa_bb_store(), but\nxe_config_device_release() only frees ctx_restore_post_bb.\n\nFree ctx_restore_mid_bb[0].cs as well to avoid leaking the allocation\nwhen the configfs device is removed.\n\n(cherry picked from commit a235e7d0098337c3f2d1e8f3610c719a589e115f)\n\n## Affected\n\n- `Linux >= b30d5de3d40c3fa642079bac0d91f17091c5f877 < 7f971dfd48983074adc7bbcea3ee95ce7aad47cb`\n- `Linux >= b30d5de3d40c3fa642079bac0d91f17091c5f877 < 3557359ea3df32430ea7c30f7a708ca9a91d7e0e`\n- `Linux >= b30d5de3d40c3fa642079bac0d91f17091c5f877 < e377182f0266f46f02d01838e6bde67b9dac0d66`\n- `Linux 6.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}