CVE-2026-46210

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46210", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.105Z", "datePublished": "2026-05-28T09:40:27.884Z", "dateUpdated": "2026-10-15T10:07:25.926Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-15T10:07:25.926Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: iris: fix use-after-free of fmt_src during MBPF check\n\nDuring concurrency testing, multiple instances can run in parallel, and\neach instance uses its own inst->lock while the core->lock protects the\nlist of active instances. The race happens because these locks cover\ndifferent scopes, inst->lock protects only the internals of a single\ninstance, while the Macro Blocks Per Frame (MBPF) checker walks the\ncore list under core->lock and reads fields like fmt_src->width and\nfmt_src->height. At the same time, iris_close() may free fmt_src and\nfmt_dst under inst->lock while the instance is still present in the core\nlist. This allows a situation where the MBPF checker, still iterating\nthrough the core list, reaches an instance whose fmt_src was already\nfreed by another thread and ends up dereferencing a dangling pointer,\nresulting in a use-after-free. This happens because the MBPF checker\nassumes that any instance in the core list is fully valid, but the\nfreeing of fmt_src and fmt_dst without removing the instance from the\ncore list is not correct.\n\nThe correct ordering is to defer freeing fmt_src and fmt_dst until after\nthe instance has been removed from the core list and all teardown under\nthe core lock has completed, ensuring that no dangling pointers are ever\nexposed during MBPF checks."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable code is reached only through V4L2 ioctls (REQBUFS/STREAMON/close) on a local `/dev/video*` codec device node; there is no network-facing path to the iris driver.\nAC:L - The attacker controls both sides of the race\u2014closing one instance (freeing fmt_src while still listed) while issuing REQBUFS/STREAMON on another to walk the core list\u2014and the two paths use different locks, so the window is reliably re-triggerable.\nPR:L - Exploitation requires opening the codec device node, which a normal local unprivileged user/app can do (video-group/logind ACL on Linux, mediacodec/app access on Android); no root or special capability is needed.\nUI:N - The attacker performs all device opens, ioctls, and closes itself; no victim action is required.\nS:U - The use-after-free is confined to the kernel's own memory and security authority; it does not cross into another security scope such as a VM or IOMMU boundary.\nC:H - This is a use-after-free read of a freed slab object (`struct v4l2_format`); a reallocated, attacker-controlled object enables disclosure of kernel memory contents.\nI:H - A UAF on a freed heap object permits heap-spray/reallocation manipulation that can be leveraged into a write/control primitive over the dangling slab object.\nA:H - Dereferencing the dangling `fmt_src` pointer (potentially in an unmapped/reused page) readily causes a kernel oops or panic."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/media/platform/qcom/iris/iris_vdec.c", "drivers/media/platform/qcom/iris/iris_vdec.h", "drivers/media/platform/qcom/iris/iris_venc.c", "drivers/media/platform/qcom/iris/iris_venc.h", "drivers/media/platform/qcom/iris/iris_vidc.c"], "versions": [{"version": "5ad964ad5656668399f00c76707f0d063b64a4b1", "lessThan": "96889fcdb0988108a19a29b0467717a503651a73", "status": "affected", "versionType": "git"}, {"version": "5ad964ad5656668399f00c76707f0d063b64a4b1", "lessThan": "494ffd1712a588e590e6b1e9f876a8c8b24a9180", "status": "affected", "versionType": "git"}, {"version": "5ad964ad5656668399f00c76707f0d063b64a4b1", "lessThan": "3d9593ad1a58c5acc3e5fa2a48222bb7632e6812", "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/media/platform/qcom/iris/iris_vdec.c", "drivers/media/platform/qcom/iris/iris_vdec.h", "drivers/media/platform/qcom/iris/iris_venc.c", "drivers/media/platform/qcom/iris/iris_venc.h", "drivers/media/platform/qcom/iris/iris_vidc.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.9", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.18", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.0.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/96889fcdb0988108a19a29b0467717a503651a73"}, {"url": "https://git.kernel.org/stable/c/494ffd1712a588e590e6b1e9f876a8c8b24a9180"}, {"url": "https://git.kernel.org/stable/c/3d9593ad1a58c5acc3e5fa2a48222bb7632e6812"}], "title": "media: iris: fix use-after-free of fmt_src during MBPF check", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/media/platform/qcom/iris/iris_vdec.c", "drivers/media/platform/qcom/iris/iris_vdec.h", "drivers/media/platform/qcom/iris/iris_venc.c", "drivers/media/platform/qcom/iris/iris_venc.h", "drivers/media/platform/qcom/iris/iris_vidc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "96889fcdb0988108a19a29b0467717a503651a73", "status": "affected", "version": "5ad964ad5656668399f00c76707f0d063b64a4b1", "versionType": "git"}, {"lessThan": "494ffd1712a588e590e6b1e9f876a8c8b24a9180", "status": "affected", "version": "5ad964ad5656668399f00c76707f0d063b64a4b1", "versionType": "git"}, {"lessThan": "3d9593ad1a58c5acc3e5fa2a48222bb7632e6812", "status": "affected", "version": "5ad964ad5656668399f00c76707f0d063b64a4b1", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/media/platform/qcom/iris/iris_vdec.c", "drivers/media/platform/qcom/iris/iris_vdec.h", "drivers/media/platform/qcom/iris/iris_venc.c", "drivers/media/platform/qcom/iris/iris_venc.h", "drivers/media/platform/qcom/iris/iris_vidc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.18"}, {"lessThan": "6.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "984C3FDA-3F4C-45DD-BF23-0EF123E67745", "versionEndExcluding": "7.0.9", "versionStartIncluding": "6.18", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: iris: fix use-after-free of fmt_src during MBPF check\n\nDuring concurrency testing, multiple instances can run in parallel, and\neach instance uses its own inst->lock while the core->lock protects the\nlist of active instances. The race happens because these locks cover\ndifferent scopes, inst->lock protects only the internals of a single\ninstance, while the Macro Blocks Per Frame (MBPF) checker walks the\ncore list under core->lock and reads fields like fmt_src->width and\nfmt_src->height. At the same time, iris_close() may free fmt_src and\nfmt_dst under inst->lock while the instance is still present in the core\nlist. This allows a situation where the MBPF checker, still iterating\nthrough the core list, reaches an instance whose fmt_src was already\nfreed by another thread and ends up dereferencing a dangling pointer,\nresulting in a use-after-free. This happens because the MBPF checker\nassumes that any instance in the core list is fully valid, but the\nfreeing of fmt_src and fmt_dst without removing the instance from the\ncore list is not correct.\n\nThe correct ordering is to defer freeing fmt_src and fmt_dst until after\nthe instance has been removed from the core list and all teardown under\nthe core lock has completed, ensuring that no dangling pointers are ever\nexposed during MBPF checks."}], "id": "CVE-2026-46210", "lastModified": "2026-10-15T11:17:32.110", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-28T10:16:36.673", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3d9593ad1a58c5acc3e5fa2a48222bb7632e6812"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/494ffd1712a588e590e6b1e9f876a8c8b24a9180"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/96889fcdb0988108a19a29b0467717a503651a73"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: media: iris: fix use-after-free of fmt_src during MBPF check", "id": "2482599", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482599"}, "csaw": false, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's iris media driver. A race condition can occur when the driver attempts to free a resource while it is still being accessed by another part of the system. This leads to a use-after-free vulnerability, where a program tries to use memory that has already been released. Exploiting this flaw could cause system instability or a denial of service."], "name": "CVE-2026-46210", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46210\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46210\nhttps://lore.kernel.org/linux-cve-announce/2026052834-CVE-2026-46210-9569@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5ad964ad5656668399f00c76707f0d063b64a4b1,494ffd1712a588e590e6b1e9f876a8c8b24a9180)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5ad964ad5656668399f00c76707f0d063b64a4b1,3d9593ad1a58c5acc3e5fa2a48222bb7632e6812)"}}], "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": "semver", "value": "6.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.9,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1-rc3,*]"}}], "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": "2026-05-28T13:15:22.415837+00:00", "updated": "2026-06-10T20:30:28.288583+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}