{"api_version":"1","generated_at":"2026-08-15T08:45:06+00:00","cve":"CVE-2026-74381","urls":{"html":"https://cve.report/CVE-2026-74381","api":"https://cve.report/api/cve/CVE-2026-74381.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74381","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74381"},"summary":{"title":"gpu: host1x: Allow entries in BO caches to be freed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpu: host1x: Allow entries in BO caches to be freed\n\nWhen a buffer object is pinned via host1x_bo_pin() with a cache, the\nresulting mapping is kept in the cache so it can be reused on subsequent\npins. Each mapping held a reference to the underlying host1x_bo (taken\nin tegra_bo_pin / gather_bo_pin), so as long as a mapping was cached,\nthe bo itself could not be freed.\n\nHowever, the only way to remove the cached mapping was through the free\npath of the buffer object. This meant that if a bo got cached, it could\nnever get freed again.\n\nResolve the circularity by holding a weak reference to the bo from the\ncache side. This is done by having the .pin callbacks not bump the bo's\nrefcount -- instead the common Host1x bo code does so, except for the\ncache reference.\n\nAlso move the remove-cache-mapping-on-free code into a common function\ninside Host1x code. This is only called from the TegraDRM GEM buffers\nsince those are the only ones that can be cached at the moment.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:39","updated_at":"2026-08-15 06:22:39"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/0e9dd7cfb9986b78cc81eca126ccfbf57f4c0602","name":"https://git.kernel.org/stable/c/0e9dd7cfb9986b78cc81eca126ccfbf57f4c0602","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/71c017b3f83ff72638f2a1b1d6d4e7bc61d30231","name":"https://git.kernel.org/stable/c/71c017b3f83ff72638f2a1b1d6d4e7bc61d30231","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/df63c76f9c8d881ca7bce1aecfba512328d0527d","name":"https://git.kernel.org/stable/c/df63c76f9c8d881ca7bce1aecfba512328d0527d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3cbf5e3c46e66d9b3b6b91099bb720c6cb1be3bc","name":"https://git.kernel.org/stable/c/3cbf5e3c46e66d9b3b6b91099bb720c6cb1be3bc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8c0d3cf0d5108c96317e0eca92b60dd368867cef","name":"https://git.kernel.org/stable/c/8c0d3cf0d5108c96317e0eca92b60dd368867cef","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/af755456299d44e4ed6af3b7c70a7f03ea37fdf1","name":"https://git.kernel.org/stable/c/af755456299d44e4ed6af3b7c70a7f03ea37fdf1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74381","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74381","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f39b1dfa53c84b56d7ad37fed44afda7004959d af755456299d44e4ed6af3b7c70a7f03ea37fdf1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f39b1dfa53c84b56d7ad37fed44afda7004959d 71c017b3f83ff72638f2a1b1d6d4e7bc61d30231 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f39b1dfa53c84b56d7ad37fed44afda7004959d 0e9dd7cfb9986b78cc81eca126ccfbf57f4c0602 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f39b1dfa53c84b56d7ad37fed44afda7004959d 8c0d3cf0d5108c96317e0eca92b60dd368867cef git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f39b1dfa53c84b56d7ad37fed44afda7004959d df63c76f9c8d881ca7bce1aecfba512328d0527d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f39b1dfa53c84b56d7ad37fed44afda7004959d 3cbf5e3c46e66d9b3b6b91099bb720c6cb1be3bc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.17","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.17 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/tegra/gem.c","drivers/gpu/drm/tegra/submit.c","drivers/gpu/host1x/bus.c","include/linux/host1x.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"af755456299d44e4ed6af3b7c70a7f03ea37fdf1","status":"affected","version":"1f39b1dfa53c84b56d7ad37fed44afda7004959d","versionType":"git"},{"lessThan":"71c017b3f83ff72638f2a1b1d6d4e7bc61d30231","status":"affected","version":"1f39b1dfa53c84b56d7ad37fed44afda7004959d","versionType":"git"},{"lessThan":"0e9dd7cfb9986b78cc81eca126ccfbf57f4c0602","status":"affected","version":"1f39b1dfa53c84b56d7ad37fed44afda7004959d","versionType":"git"},{"lessThan":"8c0d3cf0d5108c96317e0eca92b60dd368867cef","status":"affected","version":"1f39b1dfa53c84b56d7ad37fed44afda7004959d","versionType":"git"},{"lessThan":"df63c76f9c8d881ca7bce1aecfba512328d0527d","status":"affected","version":"1f39b1dfa53c84b56d7ad37fed44afda7004959d","versionType":"git"},{"lessThan":"3cbf5e3c46e66d9b3b6b91099bb720c6cb1be3bc","status":"affected","version":"1f39b1dfa53c84b56d7ad37fed44afda7004959d","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/tegra/gem.c","drivers/gpu/drm/tegra/submit.c","drivers/gpu/host1x/bus.c","include/linux/host1x.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.17"},{"lessThan":"5.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"5.17","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpu: host1x: Allow entries in BO caches to be freed\n\nWhen a buffer object is pinned via host1x_bo_pin() with a cache, the\nresulting mapping is kept in the cache so it can be reused on subsequent\npins. Each mapping held a reference to the underlying host1x_bo (taken\nin tegra_bo_pin / gather_bo_pin), so as long as a mapping was cached,\nthe bo itself could not be freed.\n\nHowever, the only way to remove the cached mapping was through the free\npath of the buffer object. This meant that if a bo got cached, it could\nnever get freed again.\n\nResolve the circularity by holding a weak reference to the bo from the\ncache side. This is done by having the .pin callbacks not bump the bo's\nrefcount -- instead the common Host1x bo code does so, except for the\ncache reference.\n\nAlso move the remove-cache-mapping-on-free code into a common function\ninside Host1x code. This is only called from the TegraDRM GEM buffers\nsince those are the only ones that can be cached at the moment."}],"providerMetadata":{"dateUpdated":"2026-08-15T05:58:58.354Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/af755456299d44e4ed6af3b7c70a7f03ea37fdf1"},{"url":"https://git.kernel.org/stable/c/71c017b3f83ff72638f2a1b1d6d4e7bc61d30231"},{"url":"https://git.kernel.org/stable/c/0e9dd7cfb9986b78cc81eca126ccfbf57f4c0602"},{"url":"https://git.kernel.org/stable/c/8c0d3cf0d5108c96317e0eca92b60dd368867cef"},{"url":"https://git.kernel.org/stable/c/df63c76f9c8d881ca7bce1aecfba512328d0527d"},{"url":"https://git.kernel.org/stable/c/3cbf5e3c46e66d9b3b6b91099bb720c6cb1be3bc"}],"title":"gpu: host1x: Allow entries in BO caches to be freed","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74381","datePublished":"2026-08-15T05:58:58.354Z","dateReserved":"2026-08-15T05:44:03.890Z","dateUpdated":"2026-08-15T05:58:58.354Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:39","lastModifiedDate":"2026-08-15 06:22:39","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74381","Ordinal":"1","Title":"gpu: host1x: Allow entries in BO caches to be freed","CVE":"CVE-2026-74381","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74381","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpu: host1x: Allow entries in BO caches to be freed\n\nWhen a buffer object is pinned via host1x_bo_pin() with a cache, the\nresulting mapping is kept in the cache so it can be reused on subsequent\npins. Each mapping held a reference to the underlying host1x_bo (taken\nin tegra_bo_pin / gather_bo_pin), so as long as a mapping was cached,\nthe bo itself could not be freed.\n\nHowever, the only way to remove the cached mapping was through the free\npath of the buffer object. This meant that if a bo got cached, it could\nnever get freed again.\n\nResolve the circularity by holding a weak reference to the bo from the\ncache side. This is done by having the .pin callbacks not bump the bo's\nrefcount -- instead the common Host1x bo code does so, except for the\ncache reference.\n\nAlso move the remove-cache-mapping-on-free code into a common function\ninside Host1x code. This is only called from the TegraDRM GEM buffers\nsince those are the only ones that can be cached at the moment.","Type":"Description","Title":"gpu: host1x: Allow entries in BO caches to be freed"}]}}}