{"id":"CVE-2025-40311","state":"PUBLISHED","title":"accel/habanalabs: support mapping cb with vmalloc-backed coherent memory","description":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/habanalabs: support mapping cb with vmalloc-backed coherent memory\n\nWhen IOMMU is enabled, dma_alloc_coherent() with GFP_USER may return\naddresses from the vmalloc range. If such an address is mapped without\nVM_MIXEDMAP, vm_insert_page() will trigger a BUG_ON due to the\nVM_PFNMAP restriction.\n\nFix this by checking for vmalloc addresses and setting VM_MIXEDMAP\nin the VMA before mapping. This ensures safe mapping and avoids kernel\ncrashes. The memory is still driver-allocated and cannot be accessed\ndirectly by userspace.","publishedAt":"2025-12-08T00:46:36.903Z","updatedAt":"2026-10-30T12:22:59.945Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399","status":"affected","lessThan":"8de421db5b1b2b37e9643ea7f6ade90fd756892d","versionType":"git"},{"version":"ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399","status":"affected","lessThan":"7ec8ac9f73d4a9438c2186768d6de27ace37531e","versionType":"git"},{"version":"ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399","status":"affected","lessThan":"d1dfe21a332d38a6a09658ec29a55940afb5fe36","versionType":"git"},{"version":"ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399","status":"affected","lessThan":"73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9","versionType":"git"},{"version":"ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399","status":"affected","lessThan":"513024d5a0e34fd34247043f1876b6138ca52847","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/habanalabs/gaudi/gaudi.c","drivers/accel/habanalabs/gaudi2/gaudi2.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.8","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.117","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.58","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.8","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/habanalabs/gaudi/gaudi.c","drivers/accel/habanalabs/gaudi2/gaudi2.c"]}],"references":["https://git.kernel.org/stable/c/8de421db5b1b2b37e9643ea7f6ade90fd756892d","https://git.kernel.org/stable/c/7ec8ac9f73d4a9438c2186768d6de27ace37531e","https://git.kernel.org/stable/c/d1dfe21a332d38a6a09658ec29a55940afb5fe36","https://git.kernel.org/stable/c/73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9","https://git.kernel.org/stable/c/513024d5a0e34fd34247043f1876b6138ca52847"],"weaknesses":[],"ingestedAt":"2026-10-30T12:40:04.423Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40311.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40311","state":"PUBLISHED","datePublished":"2025-12-08T00:46:36.903Z","dateUpdated":"2026-10-30T12:22:59.945Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.185Z"},"containers":{"cna":{"title":"accel/habanalabs: support mapping cb with vmalloc-backed coherent memory","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/habanalabs: support mapping cb with vmalloc-backed coherent memory\n\nWhen IOMMU is enabled, dma_alloc_coherent() with GFP_USER may return\naddresses from the vmalloc range. If such an address is mapped without\nVM_MIXEDMAP, vm_insert_page() will trigger a BUG_ON due to the\nVM_PFNMAP restriction.\n\nFix this by checking for vmalloc addresses and setting VM_MIXEDMAP\nin the VMA before mapping. This ensures safe mapping and avoids kernel\ncrashes. The memory is still driver-allocated and cannot be accessed\ndirectly by userspace."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399","status":"affected","lessThan":"8de421db5b1b2b37e9643ea7f6ade90fd756892d","versionType":"git"},{"version":"ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399","status":"affected","lessThan":"7ec8ac9f73d4a9438c2186768d6de27ace37531e","versionType":"git"},{"version":"ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399","status":"affected","lessThan":"d1dfe21a332d38a6a09658ec29a55940afb5fe36","versionType":"git"},{"version":"ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399","status":"affected","lessThan":"73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9","versionType":"git"},{"version":"ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399","status":"affected","lessThan":"513024d5a0e34fd34247043f1876b6138ca52847","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/habanalabs/gaudi/gaudi.c","drivers/accel/habanalabs/gaudi2/gaudi2.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.8","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.117","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.58","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.8","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/habanalabs/gaudi/gaudi.c","drivers/accel/habanalabs/gaudi2/gaudi2.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/8de421db5b1b2b37e9643ea7f6ade90fd756892d"},{"url":"https://git.kernel.org/stable/c/7ec8ac9f73d4a9438c2186768d6de27ace37531e"},{"url":"https://git.kernel.org/stable/c/d1dfe21a332d38a6a09658ec29a55940afb5fe36"},{"url":"https://git.kernel.org/stable/c/73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9"},{"url":"https://git.kernel.org/stable/c/513024d5a0e34fd34247043f1876b6138ca52847"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:22:59.945Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.6.117"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.12.58"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.17.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}