CVE-2026-53401

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53401", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.403Z", "datePublished": "2026-07-19T12:02:01.209Z", "dateUpdated": "2026-10-30T12:27:07.510Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:27:07.510Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: omap2: fix use-after-free in omapfb_mmap\n\nomapfb_mmap() has a race condition with OMAPFB_SETUP_PLANE ioctl that\ncan lead to use-after-free:\n\nThe fb_mmap() entry point holds mm_lock but not lock (fb_info->lock),\nwhile ioctl handlers like OMAPFB_SETUP_PLANE hold lock but not mm_lock.\nThis allows concurrent execution.\n\nIn omapfb_mmap():\n1. rg = omapfb_get_mem_region(ofbi->region); // Get old region ref\n2. start = omapfb_get_region_paddr(ofbi); // Read from NEW region\n3. len = fix->smem_len; // Read from NEW region\n4. vm_iomap_memory(vma, start, len); // Map NEW region memory\n5. atomic_inc(&rg->map_count); // Increment OLD region!\n\nConcurrently, OMAPFB_SETUP_PLANE can:\n- Reassign ofbi->region = new_rg\n- Update fix->smem_len\n- OMAPFB_SETUP_MEM then checks NEW region's map_count (0!) and frees it\n\nThis leaves userspace with a mapping to freed physical memory.\n\nThe fix is to read all required values (start, len) from the same\nregion reference (rg) that will have its map_count incremented,\npreventing the region from being freed while still mapped."}], "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 - Exploitation requires local syscalls (mmap and OMAPFB ioctls) against /dev/fb*; there is no network, adjacent-wireless, or physical-device insertion path to this driver code.\nAC:L - The attacker fully controls both sides of the race by opening /dev/fb and running concurrent mmap and OMAPFB_SETUP_PLANE/OMAPFB_SETUP_MEM ioctl threads, with no conditions outside attacker influence required for success.\nPR:L - Exploitation requires only the ability to open the framebuffer character device and issue its ioctls, which on OMAP embedded/kiosk deployments is typically granted to a local application user (video group or equivalent), not real root.\nUI:N - No victim interaction is required; the attacker triggers the race entirely through their own threads operating on a framebuffer device they can already open.\nS:U - Impact is confined to escalating within the same OS security boundary (userspace gaining read/write access to freed kernel/DMA physical memory), not a VM escape or cross-guest boundary crossing.\nC:H - The use-after-free leaves userspace mapped to freed physical pages that can be reallocated with sensitive kernel or DMA data, enabling arbitrary memory disclosure.\nI:H - The stale userspace mapping provides writable access to freed physical memory, enabling corruption of subsequently allocated kernel or DMA buffers and potential control-flow hijacking.\nA:H - Use-after-free of DMA framebuffer memory can cause kernel oopses or panics when freed pages are reused, and the UAF itself constitutes a high availability impact even before full exploitation."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/video/fbdev/omap2/omapfb/omapfb-main.c"], "versions": [{"version": "078ff546a806b2c2ab74c25c8edd4c6d4680656a", "lessThan": "a1a00f664a409b3412f9e1408c12890cffe50362", "status": "affected", "versionType": "git"}, {"version": "078ff546a806b2c2ab74c25c8edd4c6d4680656a", "lessThan": "5e10b1747547c3815e90d28166e92144835e065f", "status": "affected", "versionType": "git"}, {"version": "078ff546a806b2c2ab74c25c8edd4c6d4680656a", "lessThan": "986d5fafb73b8b866651399934b66d690f49135a", "status": "affected", "versionType": "git"}, {"version": "078ff546a806b2c2ab74c25c8edd4c6d4680656a", "lessThan": "8363c219d88e78daaee5665117a0380442989338", "status": "affected", "versionType": "git"}, {"version": "078ff546a806b2c2ab74c25c8edd4c6d4680656a", "lessThan": "6eb6ebcc8590007ad59ddccc8b5f9201655b33f8", "status": "affected", "versionType": "git"}, {"version": "078ff546a806b2c2ab74c25c8edd4c6d4680656a", "lessThan": "7958e67375aa111522086286bba13cfc0816ce8d", "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/video/fbdev/omap2/omapfb/omapfb-main.c"], "versions": [{"version": "2.6.36", "status": "affected"}, {"version": "0", "lessThan": "2.6.36", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.3", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "2.6.36", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "7.1.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a1a00f664a409b3412f9e1408c12890cffe50362"}, {"url": "https://git.kernel.org/stable/c/5e10b1747547c3815e90d28166e92144835e065f"}, {"url": "https://git.kernel.org/stable/c/986d5fafb73b8b866651399934b66d690f49135a"}, {"url": "https://git.kernel.org/stable/c/8363c219d88e78daaee5665117a0380442989338"}, {"url": "https://git.kernel.org/stable/c/6eb6ebcc8590007ad59ddccc8b5f9201655b33f8"}, {"url": "https://git.kernel.org/stable/c/7958e67375aa111522086286bba13cfc0816ce8d"}], "title": "fbdev: omap2: fix use-after-free in omapfb_mmap", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/video/fbdev/omap2/omapfb/omapfb-main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "a1a00f664a409b3412f9e1408c12890cffe50362", "status": "affected", "version": "078ff546a806b2c2ab74c25c8edd4c6d4680656a", "versionType": "git"}, {"lessThan": "5e10b1747547c3815e90d28166e92144835e065f", "status": "affected", "version": "078ff546a806b2c2ab74c25c8edd4c6d4680656a", "versionType": "git"}, {"lessThan": "986d5fafb73b8b866651399934b66d690f49135a", "status": "affected", "version": "078ff546a806b2c2ab74c25c8edd4c6d4680656a", "versionType": "git"}, {"lessThan": "8363c219d88e78daaee5665117a0380442989338", "status": "affected", "version": "078ff546a806b2c2ab74c25c8edd4c6d4680656a", "versionType": "git"}, {"lessThan": "6eb6ebcc8590007ad59ddccc8b5f9201655b33f8", "status": "affected", "version": "078ff546a806b2c2ab74c25c8edd4c6d4680656a", "versionType": "git"}, {"lessThan": "7958e67375aa111522086286bba13cfc0816ce8d", "status": "affected", "version": "078ff546a806b2c2ab74c25c8edd4c6d4680656a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/video/fbdev/omap2/omapfb/omapfb-main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.36"}, {"lessThan": "2.6.36", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E72580C0-1F28-4AAD-A1A1-E44AE63D4213", "versionEndExcluding": "7.1.3", "versionStartIncluding": "2.6.36", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: omap2: fix use-after-free in omapfb_mmap\n\nomapfb_mmap() has a race condition with OMAPFB_SETUP_PLANE ioctl that\ncan lead to use-after-free:\n\nThe fb_mmap() entry point holds mm_lock but not lock (fb_info->lock),\nwhile ioctl handlers like OMAPFB_SETUP_PLANE hold lock but not mm_lock.\nThis allows concurrent execution.\n\nIn omapfb_mmap():\n1. rg = omapfb_get_mem_region(ofbi->region); // Get old region ref\n2. start = omapfb_get_region_paddr(ofbi); // Read from NEW region\n3. len = fix->smem_len; // Read from NEW region\n4. vm_iomap_memory(vma, start, len); // Map NEW region memory\n5. atomic_inc(&rg->map_count); // Increment OLD region!\n\nConcurrently, OMAPFB_SETUP_PLANE can:\n- Reassign ofbi->region = new_rg\n- Update fix->smem_len\n- OMAPFB_SETUP_MEM then checks NEW region's map_count (0!) and frees it\n\nThis leaves userspace with a mapping to freed physical memory.\n\nThe fix is to read all required values (start, len) from the same\nregion reference (rg) that will have its map_count incremented,\npreventing the region from being freed while still mapped."}], "id": "CVE-2026-53401", "lastModified": "2026-10-30T13:19:17.280", "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": "2026-07-19T12:16:51.287", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5e10b1747547c3815e90d28166e92144835e065f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6eb6ebcc8590007ad59ddccc8b5f9201655b33f8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7958e67375aa111522086286bba13cfc0816ce8d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8363c219d88e78daaee5665117a0380442989338"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/986d5fafb73b8b866651399934b66d690f49135a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a1a00f664a409b3412f9e1408c12890cffe50362"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: fbdev: omap2: fix use-after-free in omapfb_mmap", "id": "2502253", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502253"}, "csaw": false, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nfbdev: omap2: fix use-after-free in omapfb_mmap\nomapfb_mmap() has a race condition with OMAPFB_SETUP_PLANE ioctl that\ncan lead to use-after-free:\nThe fb_mmap() entry point holds mm_lock but not lock (fb_info->lock),\nwhile ioctl handlers like OMAPFB_SETUP_PLANE hold lock but not mm_lock.\nThis allows concurrent execution.\nIn omapfb_mmap():\n1. rg = omapfb_get_mem_region(ofbi->region); // Get old region ref\n2. start = omapfb_get_region_paddr(ofbi); // Read from NEW region\n3. len = fix->smem_len; // Read from NEW region\n4. vm_iomap_memory(vma, start, len); // Map NEW region memory\n5. atomic_inc(&rg->map_count); // Increment OLD region!\nConcurrently, OMAPFB_SETUP_PLANE can:\n- Reassign ofbi->region = new_rg\n- Update fix->smem_len\n- OMAPFB_SETUP_MEM then checks NEW region's map_count (0!) and frees it\nThis leaves userspace with a mapping to freed physical memory.\nThe fix is to read all required values (start, len) from the same\nregion reference (rg) that will have its map_count incremented,\npreventing the region from being freed while still mapped.", "A flaw was found in the Linux kernel's omapfb display driver. A race condition in the omapfb_mmap() function, which manages memory mapping, allows for concurrent operations that can lead to a use-after-free vulnerability. This could enable a local attacker to access freed physical memory, potentially resulting in information disclosure, privilege escalation, or arbitrary code execution."], "name": "CVE-2026-53401", "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"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "impact": "moderate", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53401\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53401\nhttps://lore.kernel.org/linux-cve-announce/2026071958-CVE-2026-53401-69e2@gregkh/T"]}

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