{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45878", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.081Z", "datePublished": "2026-05-27T12:16:49.108Z", "dateUpdated": "2026-05-27T12:16:49.108Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:16:49.108Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Fix watch_id bounds checking in debug address watch v2\n\nThe address watch clear code receives watch_id as an unsigned value\n(u32), but some helper functions were using a signed int and checked\nbits by shifting with watch_id.\n\nIf a very large watch_id is passed from userspace, it can be converted\nto a negative value. This can cause invalid shifts and may access\nmemory outside the watch_points array.\n\ndrm/amdkfd: Fix watch_id bounds checking in debug address watch v2\n\nFix this by checking that watch_id is within MAX_WATCH_ADDRESSES before\nusing it. Also use BIT(watch_id) to test and clear bits safely.\n\nThis keeps the behavior unchanged for valid watch IDs and avoids\nundefined behavior for invalid ones.\n\nFixes the below:\ndrivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_debug.c:448\nkfd_dbg_trap_clear_dev_address_watch() error: buffer overflow\n'pdd->watch_points' 4 <= u32max user_rl='0-3,2147483648-u32max' uncapped\n\ndrivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_debug.c\n 433 int kfd_dbg_trap_clear_dev_address_watch(struct kfd_process_device *pdd,\n 434 uint32_t watch_id)\n 435 {\n 436 int r;\n 437\n 438 if (!kfd_dbg_owns_dev_watch_id(pdd, watch_id))\n\nkfd_dbg_owns_dev_watch_id() doesn't check for negative values so if\nwatch_id is larger than INT_MAX it leads to a buffer overflow.\n(Negative shifts are undefined).\n\n 439 return -EINVAL;\n 440\n 441 if (!pdd->dev->kfd->shared_resources.enable_mes) {\n 442 r = debug_lock_and_unmap(pdd->dev->dqm);\n 443 if (r)\n 444 return r;\n 445 }\n 446\n 447 amdgpu_gfx_off_ctrl(pdd->dev->adev, false);\n--> 448 pdd->watch_points[watch_id] = pdd->dev->kfd2kgd->clear_address_watch(\n 449 pdd->dev->adev,\n 450 watch_id);\n\nv2: (as per, Jonathan Kim)\n - Add early watch_id >= MAX_WATCH_ADDRESSES validation in the set path to\n match the clear path.\n - Drop the redundant bounds check in kfd_dbg_owns_dev_watch_id()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/amdkfd/kfd_debug.c"], "versions": [{"version": "e0f85f4690d089cc1a60337decafb1acf7eec45e", "lessThan": "971bf8e61e9b4abaacf9b35eaf76ec222758f9d6", "status": "affected", "versionType": "git"}, {"version": "e0f85f4690d089cc1a60337decafb1acf7eec45e", "lessThan": "a0d367e13db63a6ed76ee0d0a8c3a58c1fa98488", "status": "affected", "versionType": "git"}, {"version": "e0f85f4690d089cc1a60337decafb1acf7eec45e", "lessThan": "2b36c0c1bcbbe15f6cfa9652084b3124c835a150", "status": "affected", "versionType": "git"}, {"version": "e0f85f4690d089cc1a60337decafb1acf7eec45e", "lessThan": "3c38a0f07aa2bfef2b219b1f045534ad93f85afd", "status": "affected", "versionType": "git"}, {"version": "e0f85f4690d089cc1a60337decafb1acf7eec45e", "lessThan": "5a19302cab5cec7ae7f1a60c619951e6c17d8742", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/amdkfd/kfd_debug.c"], "versions": [{"version": "6.5", "status": "affected"}, {"version": "0", "lessThan": "6.5", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.18.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.19.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/971bf8e61e9b4abaacf9b35eaf76ec222758f9d6"}, {"url": "https://git.kernel.org/stable/c/a0d367e13db63a6ed76ee0d0a8c3a58c1fa98488"}, {"url": "https://git.kernel.org/stable/c/2b36c0c1bcbbe15f6cfa9652084b3124c835a150"}, {"url": "https://git.kernel.org/stable/c/3c38a0f07aa2bfef2b219b1f045534ad93f85afd"}, {"url": "https://git.kernel.org/stable/c/5a19302cab5cec7ae7f1a60c619951e6c17d8742"}], "title": "drm/amdkfd: Fix watch_id bounds checking in debug address watch v2", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Fix watch_id bounds checking in debug address watch v2\n\nThe address watch clear code receives watch_id as an unsigned value\n(u32), but some helper functions were using a signed int and checked\nbits by shifting with watch_id.\n\nIf a very large watch_id is passed from userspace, it can be converted\nto a negative value. This can cause invalid shifts and may access\nmemory outside the watch_points array.\n\ndrm/amdkfd: Fix watch_id bounds checking in debug address watch v2\n\nFix this by checking that watch_id is within MAX_WATCH_ADDRESSES before\nusing it. Also use BIT(watch_id) to test and clear bits safely.\n\nThis keeps the behavior unchanged for valid watch IDs and avoids\nundefined behavior for invalid ones.\n\nFixes the below:\ndrivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_debug.c:448\nkfd_dbg_trap_clear_dev_address_watch() error: buffer overflow\n'pdd->watch_points' 4 <= u32max user_rl='0-3,2147483648-u32max' uncapped\n\ndrivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_debug.c\n 433 int kfd_dbg_trap_clear_dev_address_watch(struct kfd_process_device *pdd,\n 434 uint32_t watch_id)\n 435 {\n 436 int r;\n 437\n 438 if (!kfd_dbg_owns_dev_watch_id(pdd, watch_id))\n\nkfd_dbg_owns_dev_watch_id() doesn't check for negative values so if\nwatch_id is larger than INT_MAX it leads to a buffer overflow.\n(Negative shifts are undefined).\n\n 439 return -EINVAL;\n 440\n 441 if (!pdd->dev->kfd->shared_resources.enable_mes) {\n 442 r = debug_lock_and_unmap(pdd->dev->dqm);\n 443 if (r)\n 444 return r;\n 445 }\n 446\n 447 amdgpu_gfx_off_ctrl(pdd->dev->adev, false);\n--> 448 pdd->watch_points[watch_id] = pdd->dev->kfd2kgd->clear_address_watch(\n 449 pdd->dev->adev,\n 450 watch_id);\n\nv2: (as per, Jonathan Kim)\n - Add early watch_id >= MAX_WATCH_ADDRESSES validation in the set path to\n match the clear path.\n - Drop the redundant bounds check in kfd_dbg_owns_dev_watch_id()."}], "id": "CVE-2026-45878", "lastModified": "2026-05-27T14:48:31.480", "metrics": {}, "published": "2026-05-27T14:17:01.547", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2b36c0c1bcbbe15f6cfa9652084b3124c835a150"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3c38a0f07aa2bfef2b219b1f045534ad93f85afd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5a19302cab5cec7ae7f1a60c619951e6c17d8742"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/971bf8e61e9b4abaacf9b35eaf76ec222758f9d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a0d367e13db63a6ed76ee0d0a8c3a58c1fa98488"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e0f85f4690d089cc1a60337decafb1acf7eec45e,971bf8e61e9b4abaacf9b35eaf76ec222758f9d6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e0f85f4690d089cc1a60337decafb1acf7eec45e,a0d367e13db63a6ed76ee0d0a8c3a58c1fa98488)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e0f85f4690d089cc1a60337decafb1acf7eec45e,2b36c0c1bcbbe15f6cfa9652084b3124c835a150)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e0f85f4690d089cc1a60337decafb1acf7eec45e,3c38a0f07aa2bfef2b219b1f045534ad93f85afd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e0f85f4690d089cc1a60337decafb1acf7eec45e,5a19302cab5cec7ae7f1a60c619951e6c17d8742)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.5"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.5)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.128,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.75,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.14,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.4,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-27T20:15:15.901889+00:00", "updated": "2026-05-27T20:45:25.622572+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-129", "CWE-191"]}