{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53085", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.383Z", "datePublished": "2026-06-24T16:30:25.232Z", "dateUpdated": "2026-06-30T03:21:03.801Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-28T06:39:07.012Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix mm lifecycle in open-coded task_vma iterator\n\nThe open-coded task_vma iterator reads task->mm locklessly and acquires\nmmap_read_trylock() but never calls mmget(). If the task exits\nconcurrently, the mm_struct can be freed as it is not\nSLAB_TYPESAFE_BY_RCU, resulting in a use-after-free.\n\nSafely read task->mm with a trylock on alloc_lock and acquire an mm\nreference. Drop the reference via bpf_iter_mmput_async() in _destroy()\nand error paths. bpf_iter_mmput_async() is a local wrapper around\nmmput_async() with a fallback to mmput() on !CONFIG_MMU.\n\nReject irqs-disabled contexts (including NMI) up front. Operations used\nby _next() and _destroy() (mmap_read_unlock, bpf_iter_mmput_async)\ntake spinlocks with IRQs disabled (pool->lock, pi_lock). Running from\nNMI or from a tracepoint that fires with those locks held could\ndeadlock.\n\nA trylock on alloc_lock is used instead of the blocking task_lock()\n(get_task_mm) to avoid a deadlock when a softirq BPF program iterates\na task that already holds its alloc_lock on the same CPU."}], "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"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/task_iter.c"], "versions": [{"version": "4ac4546821584736798aaa9e97da9f6eaf689ea3", "lessThan": "239cec25a22662dbd80f57d94b38178c8be95269", "status": "affected", "versionType": "git"}, {"version": "4ac4546821584736798aaa9e97da9f6eaf689ea3", "lessThan": "d0862de7c866c5bd7c32531f66738c21197af888", "status": "affected", "versionType": "git"}, {"version": "4ac4546821584736798aaa9e97da9f6eaf689ea3", "lessThan": "43683bb280330f3d36f0f2a3932a4867b9603e9c", "status": "affected", "versionType": "git"}, {"version": "4ac4546821584736798aaa9e97da9f6eaf689ea3", "lessThan": "d8e27d2d22b6e2df3a0125b8c08e9aace38c954c", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/task_iter.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.10", "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": "6.7", "versionEndExcluding": "6.12.91"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.18.33"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.0.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/239cec25a22662dbd80f57d94b38178c8be95269"}, {"url": "https://git.kernel.org/stable/c/d0862de7c866c5bd7c32531f66738c21197af888"}, {"url": "https://git.kernel.org/stable/c/43683bb280330f3d36f0f2a3932a4867b9603e9c"}, {"url": "https://git.kernel.org/stable/c/d8e27d2d22b6e2df3a0125b8c08e9aace38c954c"}], "title": "bpf: fix mm lifecycle in open-coded task_vma iterator", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"affected": [{"cpes": ["cpe:/o:redhat:enterprise_linux:10"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:9"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:6"], "defaultStatus": "unaffected", "product": "Red Hat Enterprise Linux 6", "vendor": "Red Hat"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:7"], "defaultStatus": "unaffected", "product": "Red Hat Enterprise Linux 7", "vendor": "Red Hat"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:8"], "defaultStatus": "unaffected", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat"}], "datePublic": "2026-06-24T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "A flaw was found in the Linux kernel's Berkeley Packet Filter (BPF) subsystem. This use-after-free vulnerability occurs when the `task_vma` iterator reads task memory without properly acquiring a reference, allowing the memory structure to be freed concurrently while still in use. This can lead to system instability or a denial of service (DoS). Additionally, improper handling of interrupt-disabled contexts could result in a deadlock."}], "metrics": [{"other": {"content": {"namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "format": "CVSS"}], "problemTypes": [{"descriptions": [{"cweId": "CWE-825", "description": "Expired Pointer Dereference", "lang": "en", "type": "CWE"}]}], "references": [{"tags": ["vdb-entry", "x_refsource_REDHAT"], "url": "https://access.redhat.com/security/cve/CVE-2026-53085"}, {"name": "RHBZ#2492404", "tags": ["issue-tracking", "x_refsource_REDHAT"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492404"}, {"tags": ["x_sadp-csaf-vex"], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53085.json"}], "timeline": [{"lang": "en", "time": "2026-06-24T00:00:00.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-06-24T00:00:00.000Z", "value": "Made public."}], "title": "kernel: bpf: fix mm lifecycle in open-coded task_vma iterator", "x_adpType": "supplier", "x_generator": {"engine": "sadp-cli 1.0.0"}, "providerMetadata": {"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-06-30T03:21:03.801Z"}}]}}

{}

{}

{"bugzilla": {"description": "kernel: bpf: fix mm lifecycle in open-coded task_vma iterator", "id": "2492404", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492404"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: fix mm lifecycle in open-coded task_vma iterator\nThe open-coded task_vma iterator reads task->mm locklessly and acquires\nmmap_read_trylock() but never calls mmget(). If the task exits\nconcurrently, the mm_struct can be freed as it is not\nSLAB_TYPESAFE_BY_RCU, resulting in a use-after-free.\nSafely read task->mm with a trylock on alloc_lock and acquire an mm\nreference. Drop the reference via bpf_iter_mmput_async() in _destroy()\nand error paths. bpf_iter_mmput_async() is a local wrapper around\nmmput_async() with a fallback to mmput() on !CONFIG_MMU.\nReject irqs-disabled contexts (including NMI) up front. Operations used\nby _next() and _destroy() (mmap_read_unlock, bpf_iter_mmput_async)\ntake spinlocks with IRQs disabled (pool->lock, pi_lock). Running from\nNMI or from a tracepoint that fires with those locks held could\ndeadlock.\nA trylock on alloc_lock is used instead of the blocking task_lock()\n(get_task_mm) to avoid a deadlock when a softirq BPF program iterates\na task that already holds its alloc_lock on the same CPU.", "A flaw was found in the Linux kernel's Berkeley Packet Filter (BPF) subsystem. This use-after-free vulnerability occurs when the `task_vma` iterator reads task memory without properly acquiring a reference, allowing the memory structure to be freed concurrently while still in use. This can lead to system instability or a denial of service (DoS). Additionally, improper handling of interrupt-disabled contexts could result in a deadlock."], "name": "CVE-2026-53085", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53085\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53085\nhttps://lore.kernel.org/linux-cve-announce/2026062408-CVE-2026-53085-79c3@gregkh/T"], "threat_severity": "Important"}