CVE-2026-98521

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98521", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.355Z", "datePublished": "2026-10-18T15:17:38.938Z", "dateUpdated": "2026-10-19T09:21:03.153Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:21:03.153Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915: fix incorrect RCU teardown order\n\ni915_gem_busy_ioctl uses dma_resv_for_each_fence_unlocked() to iterate\nover the fences in an GEM object without holding a reference but only\nthe RCU read side lock.\n\nWhat can happen here is that the GEM object is destroyed concurrently\nwhile i915_gem_busy_ioctl is still running. This won't free the GEM\nobjects memory, but still drops all the dma_fence references.\n\nNow when dma_resv_for_each_fence_unlocked() sees a destroyed dma_fence it\nassumes that a new fence list was installed and re-starts the loop.\n\nBut in the case of a destroyed GEM object a new fence list is never\ninstalled, only the old one freed and therefore the iteration never\nfinishes resulting in an endless loop.\n\nThe solution is to drop the fence references only after the RCU grace\nperiod.\n\nThe fixes tag is not necessary the patch introducing the problem, but the\none making it so worse that we need to address it.\n\nThis problem was pointed out by Sashiko-bot.\n\n(cherry picked from commit 5113479556025093bf8133bb2dcaa33be2d50921)"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/i915/gem/i915_gem_object.c"], "versions": [{"version": "912ff2ebd695c582ca4cebf833ad73a378a99f23", "lessThan": "4d4ca84213327da1f84ef7af3946dea6b14c5d88", "status": "affected", "versionType": "git"}, {"version": "912ff2ebd695c582ca4cebf833ad73a378a99f23", "lessThan": "c53db9cc245219af6b528ca022a17ebfa91d80ba", "status": "affected", "versionType": "git"}, {"version": "912ff2ebd695c582ca4cebf833ad73a378a99f23", "lessThan": "b12e041aedcf9fa77c6002a49f07eb20d0521b86", "status": "affected", "versionType": "git"}, {"version": "912ff2ebd695c582ca4cebf833ad73a378a99f23", "lessThan": "cc890d3f1b15bf6481dc7270fba0b4fbba572813", "status": "affected", "versionType": "git"}, {"version": "912ff2ebd695c582ca4cebf833ad73a378a99f23", "lessThan": "2dd0190e397ec6468095fd3e80e79276a7361449", "status": "affected", "versionType": "git"}, {"version": "912ff2ebd695c582ca4cebf833ad73a378a99f23", "lessThan": "d2da6696e0c4e60414706e607029d0bb0330c67e", "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/i915/gem/i915_gem_object.c"], "versions": [{"version": "5.17", "status": "affected"}, {"version": "0", "lessThan": "5.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "5.17", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4d4ca84213327da1f84ef7af3946dea6b14c5d88"}, {"url": "https://git.kernel.org/stable/c/c53db9cc245219af6b528ca022a17ebfa91d80ba"}, {"url": "https://git.kernel.org/stable/c/b12e041aedcf9fa77c6002a49f07eb20d0521b86"}, {"url": "https://git.kernel.org/stable/c/cc890d3f1b15bf6481dc7270fba0b4fbba572813"}, {"url": "https://git.kernel.org/stable/c/2dd0190e397ec6468095fd3e80e79276a7361449"}, {"url": "https://git.kernel.org/stable/c/d2da6696e0c4e60414706e607029d0bb0330c67e"}], "title": "drm/i915: fix incorrect RCU teardown order", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/i915/gem/i915_gem_object.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4d4ca84213327da1f84ef7af3946dea6b14c5d88", "status": "affected", "version": "912ff2ebd695c582ca4cebf833ad73a378a99f23", "versionType": "git"}, {"lessThan": "c53db9cc245219af6b528ca022a17ebfa91d80ba", "status": "affected", "version": "912ff2ebd695c582ca4cebf833ad73a378a99f23", "versionType": "git"}, {"lessThan": "b12e041aedcf9fa77c6002a49f07eb20d0521b86", "status": "affected", "version": "912ff2ebd695c582ca4cebf833ad73a378a99f23", "versionType": "git"}, {"lessThan": "cc890d3f1b15bf6481dc7270fba0b4fbba572813", "status": "affected", "version": "912ff2ebd695c582ca4cebf833ad73a378a99f23", "versionType": "git"}, {"lessThan": "2dd0190e397ec6468095fd3e80e79276a7361449", "status": "affected", "version": "912ff2ebd695c582ca4cebf833ad73a378a99f23", "versionType": "git"}, {"lessThan": "d2da6696e0c4e60414706e607029d0bb0330c67e", "status": "affected", "version": "912ff2ebd695c582ca4cebf833ad73a378a99f23", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/i915/gem/i915_gem_object.c"], "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": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.55", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915: fix incorrect RCU teardown order\n\ni915_gem_busy_ioctl uses dma_resv_for_each_fence_unlocked() to iterate\nover the fences in an GEM object without holding a reference but only\nthe RCU read side lock.\n\nWhat can happen here is that the GEM object is destroyed concurrently\nwhile i915_gem_busy_ioctl is still running. This won't free the GEM\nobjects memory, but still drops all the dma_fence references.\n\nNow when dma_resv_for_each_fence_unlocked() sees a destroyed dma_fence it\nassumes that a new fence list was installed and re-starts the loop.\n\nBut in the case of a destroyed GEM object a new fence list is never\ninstalled, only the old one freed and therefore the iteration never\nfinishes resulting in an endless loop.\n\nThe solution is to drop the fence references only after the RCU grace\nperiod.\n\nThe fixes tag is not necessary the patch introducing the problem, but the\none making it so worse that we need to address it.\n\nThis problem was pointed out by Sashiko-bot.\n\n(cherry picked from commit 5113479556025093bf8133bb2dcaa33be2d50921)"}], "id": "CVE-2026-98521", "lastModified": "2026-10-19T10:19:06.040", "metrics": {}, "published": "2026-10-18T16:17:03.473", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2dd0190e397ec6468095fd3e80e79276a7361449"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4d4ca84213327da1f84ef7af3946dea6b14c5d88"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b12e041aedcf9fa77c6002a49f07eb20d0521b86"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c53db9cc245219af6b528ca022a17ebfa91d80ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cc890d3f1b15bf6481dc7270fba0b4fbba572813"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d2da6696e0c4e60414706e607029d0bb0330c67e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: drm/i915: fix incorrect RCU teardown order", "id": "2554911", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554911"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-835", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/i915: fix incorrect RCU teardown order\ni915_gem_busy_ioctl uses dma_resv_for_each_fence_unlocked() to iterate\nover the fences in an GEM object without holding a reference but only\nthe RCU read side lock.\nWhat can happen here is that the GEM object is destroyed concurrently\nwhile i915_gem_busy_ioctl is still running. This won't free the GEM\nobjects memory, but still drops all the dma_fence references.\nNow when dma_resv_for_each_fence_unlocked() sees a destroyed dma_fence it\nassumes that a new fence list was installed and re-starts the loop.\nBut in the case of a destroyed GEM object a new fence list is never\ninstalled, only the old one freed and therefore the iteration never\nfinishes resulting in an endless loop.\nThe solution is to drop the fence references only after the RCU grace\nperiod.\nThe fixes tag is not necessary the patch introducing the problem, but the\none making it so worse that we need to address it.\nThis problem was pointed out by Sashiko-bot.\n(cherry picked from commit 5113479556025093bf8133bb2dcaa33be2d50921)", "A flaw was found in the Linux kernel's i915 graphics driver. When a graphics buffer object is concurrently destroyed while its busy status is being queried, an improper teardown sequence can cause the driver to restart its iteration indefinitely. A local attacker can exploit this race condition to trigger an infinite loop, resulting in a Denial of Service (DoS) and system hang."], "name": "CVE-2026-98521", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98521\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98521\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98521.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[912ff2ebd695c582ca4cebf833ad73a378a99f23,4d4ca84213327da1f84ef7af3946dea6b14c5d88)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[912ff2ebd695c582ca4cebf833ad73a378a99f23,c53db9cc245219af6b528ca022a17ebfa91d80ba)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[912ff2ebd695c582ca4cebf833ad73a378a99f23,b12e041aedcf9fa77c6002a49f07eb20d0521b86)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[912ff2ebd695c582ca4cebf833ad73a378a99f23,cc890d3f1b15bf6481dc7270fba0b4fbba572813)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[912ff2ebd695c582ca4cebf833ad73a378a99f23,2dd0190e397ec6468095fd3e80e79276a7361449)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[912ff2ebd695c582ca4cebf833ad73a378a99f23,d2da6696e0c4e60414706e607029d0bb0330c67e)"}}], "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": "5.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.189,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.158,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc5,*]"}}], "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": "2026-10-18T23:45:07.049375+00:00", "updated": "2026-10-20T13:00:12.971114+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362", "CWE-416", "CWE-835"]}