{"id":"CVE-2026-52965","state":"PUBLISHED","title":"drm/ttm: Fix ttm_bo_swapout() infinite LRU walk on swapout failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/ttm: Fix ttm_bo_swapout() infinite LRU walk on swapout failure\n\nWhen ttm_tt_swapout() fails, the current code calls\nttm_resource_add_bulk_move() followed by ttm_resource_move_to_lru_tail()\nto restore the resource's bulk_move membership.\n\nHowever, ttm_resource_move_to_lru_tail() places the resource at the tail\nof the LRU list which, relative to the walk cursor's hitch node (placed\nimmediately after the resource when it was yielded), puts the resource\n*in front of the* the hitch. The next list_for_each_entry_continue() from\nthe hitch finds the same resource again, causing an infinite loop.\n\nFix by deferring del_bulk_move to the success path only.\n\nOn the success path, TTM_TT_FLAG_SWAPPED has just been set by\nttm_tt_swapout() but the resource is still tracked in the bulk_move range,\nso ttm_resource_del_bulk_move()'s !ttm_resource_unevictable() guard would\nincorrectly skip the removal. Introduce\nttm_resource_del_bulk_move_unevictable() which bypasses that guard.","publishedAt":"2026-06-24T16:28:45.090Z","updatedAt":"2026-10-15T10:07:34.455Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fc5d96670eb2540d2572a14351e82ffe45d5ac11","status":"affected","lessThan":"060f8f3020516d71bc4d6159d4d0beef85606a74","versionType":"git"},{"version":"fc5d96670eb2540d2572a14351e82ffe45d5ac11","status":"affected","lessThan":"0124a09e3e5f5f6080efe9663b27af27933f8382","versionType":"git"},{"version":"fc5d96670eb2540d2572a14351e82ffe45d5ac11","status":"affected","lessThan":"b2ed01e7ad3de80333e9b962a44024b094bc0b2b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/ttm/ttm_bo.c","drivers/gpu/drm/ttm/ttm_resource.c","include/drm/ttm/ttm_resource.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/ttm/ttm_bo.c","drivers/gpu/drm/ttm/ttm_resource.c","include/drm/ttm/ttm_resource.h"]}],"references":["https://git.kernel.org/stable/c/060f8f3020516d71bc4d6159d4d0beef85606a74","https://git.kernel.org/stable/c/0124a09e3e5f5f6080efe9663b27af27933f8382","https://git.kernel.org/stable/c/b2ed01e7ad3de80333e9b962a44024b094bc0b2b"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52965.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52965","state":"PUBLISHED","datePublished":"2026-06-24T16:28:45.090Z","dateUpdated":"2026-10-15T10:07:34.455Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.374Z"},"containers":{"cna":{"title":"drm/ttm: Fix ttm_bo_swapout() infinite LRU walk on swapout failure","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/ttm: Fix ttm_bo_swapout() infinite LRU walk on swapout failure\n\nWhen ttm_tt_swapout() fails, the current code calls\nttm_resource_add_bulk_move() followed by ttm_resource_move_to_lru_tail()\nto restore the resource's bulk_move membership.\n\nHowever, ttm_resource_move_to_lru_tail() places the resource at the tail\nof the LRU list which, relative to the walk cursor's hitch node (placed\nimmediately after the resource when it was yielded), puts the resource\n*in front of the* the hitch. The next list_for_each_entry_continue() from\nthe hitch finds the same resource again, causing an infinite loop.\n\nFix by deferring del_bulk_move to the success path only.\n\nOn the success path, TTM_TT_FLAG_SWAPPED has just been set by\nttm_tt_swapout() but the resource is still tracked in the bulk_move range,\nso ttm_resource_del_bulk_move()'s !ttm_resource_unevictable() guard would\nincorrectly skip the removal. Introduce\nttm_resource_del_bulk_move_unevictable() which bypasses that guard."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fc5d96670eb2540d2572a14351e82ffe45d5ac11","status":"affected","lessThan":"060f8f3020516d71bc4d6159d4d0beef85606a74","versionType":"git"},{"version":"fc5d96670eb2540d2572a14351e82ffe45d5ac11","status":"affected","lessThan":"0124a09e3e5f5f6080efe9663b27af27933f8382","versionType":"git"},{"version":"fc5d96670eb2540d2572a14351e82ffe45d5ac11","status":"affected","lessThan":"b2ed01e7ad3de80333e9b962a44024b094bc0b2b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/ttm/ttm_bo.c","drivers/gpu/drm/ttm/ttm_resource.c","include/drm/ttm/ttm_resource.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/ttm/ttm_bo.c","drivers/gpu/drm/ttm/ttm_resource.c","include/drm/ttm/ttm_resource.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/060f8f3020516d71bc4d6159d4d0beef85606a74"},{"url":"https://git.kernel.org/stable/c/0124a09e3e5f5f6080efe9663b27af27933f8382"},{"url":"https://git.kernel.org/stable/c/b2ed01e7ad3de80333e9b962a44024b094bc0b2b"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-15T10:07:34.455Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}