CVE-2023-53314

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The call to\nregister_framebuffer() initializes the field to the fbdev device.\nDrivers should not override its value.\n\nFixes a bug where the driver incorrectly decreases the hardware\ndevice's reference counter and leaks the fbdev device.\n\nv2:\n\t* add Fixes tag (Dan)"}], "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 bug is in the ep93xx-fb platform driver probe/remove path for the on-SoC Cirrus EP93xx LCD controller; it is reached only locally via boot probe, module load, or sysfs bind/unbind, with no network or hot-plug physical entry point.\nAC:L - The incorrect info->dev assignment and resulting device refcount imbalance are deterministic on probe/unregister; the attacker does not depend on a race or an uncontrolled memory layout.\nPR:L - Although sysfs bind/unbind is root-owned 0200, the highest reasonable actor is a low-privileged local user on an EP93xx system where the framebuffer is already bound and /dev/fbN is usable, so PR:L is chosen over PR:H.\nUI:N - Exploitation does not require a separate victim action such as mounting a filesystem or manually opening a device beyond the attacker\u2019s own local access.\nS:U - Impact stays within the host kernel\u2019s device/refcount authority; this is not a VM escape, IOMMU bypass, or other cross-boundary break.\nC:H - Incorrectly dropping the hardware device\u2019s reference count can free the live platform device while fbdev code still uses it, yielding a use-after-free that can be leveraged for arbitrary kernel memory disclosure.\nI:H - The same device UAF is exploitable for heap reuse and arbitrary write/control-flow hijack primitives against kernel memory, not merely a benign bookkeeping error.\nA:H - A device UAF or bad put on the platform device can oops/panic the kernel on unregister or later fbdev use, and the companion fbdev device leak is secondary to that crash impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/video/fbdev/ep93xx-fb.c"], "versions": [{"version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "ffdf2b020db717853167391a3a8d912e13428fa6", "status": "affected", "versionType": "git"}, {"version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "1c6ff2a7c593db851f23e31ace2baf557ea9d0ff", "status": "affected", "versionType": "git"}, {"version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "8ffa40ff64aa43a9a28fcf209b48d86a3e0f4972", "status": "affected", "versionType": "git"}, {"version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "4aade6c9100a3537788b6a9c7ac481037d19efdf", "status": "affected", "versionType": "git"}, {"version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "309c27162afea79b3c7f8747bb650faf6923b639", "status": "affected", "versionType": "git"}, {"version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "f83c1b13f8154e0284448912756d0a351a1a602a", "status": "affected", "versionType": "git"}, {"version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "0517fc5a71333b315164736bbd32608894fbb872", "status": "affected", "versionType": "git"}, {"version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "f90a0e5265b60cdd3c77990e8105f79aa2fac994", "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/ep93xx-fb.c"], "versions": [{"version": "2.6.32", "status": "affected"}, {"version": "0", "lessThan": "2.6.32", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.326", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": 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"versionEndExcluding": "6.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ffdf2b020db717853167391a3a8d912e13428fa6"}, {"url": "https://git.kernel.org/stable/c/1c6ff2a7c593db851f23e31ace2baf557ea9d0ff"}, {"url": "https://git.kernel.org/stable/c/8ffa40ff64aa43a9a28fcf209b48d86a3e0f4972"}, {"url": "https://git.kernel.org/stable/c/4aade6c9100a3537788b6a9c7ac481037d19efdf"}, {"url": "https://git.kernel.org/stable/c/309c27162afea79b3c7f8747bb650faf6923b639"}, {"url": "https://git.kernel.org/stable/c/f83c1b13f8154e0284448912756d0a351a1a602a"}, {"url": "https://git.kernel.org/stable/c/0517fc5a71333b315164736bbd32608894fbb872"}, {"url": "https://git.kernel.org/stable/c/f90a0e5265b60cdd3c77990e8105f79aa2fac994"}], "title": "fbdev/ep93xx-fb: Do not assign to struct fb_info.dev", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2023-53314", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-14T18:25:34.219455Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:32:57.524Z"}}]}}

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The bug is in the ep93xx-fb platform driver probe/remove path for the on-SoC Cirrus EP93xx LCD controller; it is reached only locally via boot probe, module load, or sysfs bind/unbind, with no network or hot-plug physical entry point.\nAC:L - The incorrect info->dev assignment and resulting device refcount imbalance are deterministic on probe/unregister; the attacker does not depend on a race or an uncontrolled memory layout.\nPR:L - Although sysfs bind/unbind is root-owned 0200, the highest reasonable actor is a low-privileged local user on an EP93xx system where the framebuffer is already bound and /dev/fbN is usable, so PR:L is chosen over PR:H.\nUI:N - Exploitation does not require a separate victim action such as mounting a filesystem or manually opening a device beyond the attacker\u2019s own local access.\nS:U - Impact stays within the host kernel\u2019s device/refcount authority; this is not a VM escape, IOMMU bypass, or other cross-boundary break.\nC:H - Incorrectly dropping the hardware device\u2019s reference count can free the live platform device while fbdev code still uses it, yielding a use-after-free that can be leveraged for arbitrary kernel memory disclosure.\nI:H - The same device UAF is exploitable for heap reuse and arbitrary write/control-flow hijack primitives against kernel memory, not merely a benign bookkeeping error.\nA:H - A device UAF or bad put on the platform device can oops/panic the kernel on unregister or later fbdev use, and the companion fbdev device leak is secondary to that crash impact."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "ffdf2b020db717853167391a3a8d912e13428fa6", "versionType": "git"}, {"status": "affected", "version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "1c6ff2a7c593db851f23e31ace2baf557ea9d0ff", "versionType": "git"}, {"status": "affected", "version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "8ffa40ff64aa43a9a28fcf209b48d86a3e0f4972", "versionType": "git"}, {"status": "affected", "version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "4aade6c9100a3537788b6a9c7ac481037d19efdf", "versionType": "git"}, {"status": "affected", "version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "309c27162afea79b3c7f8747bb650faf6923b639", "versionType": "git"}, {"status": "affected", "version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "f83c1b13f8154e0284448912756d0a351a1a602a", "versionType": "git"}, {"status": "affected", "version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "0517fc5a71333b315164736bbd32608894fbb872", "versionType": "git"}, {"status": "affected", "version": "88017bda96a5fd568a982b01546c8fb1782dda62", "lessThan": "f90a0e5265b60cdd3c77990e8105f79aa2fac994", "versionType": "git"}], "programFiles": ["drivers/video/fbdev/ep93xx-fb.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.32"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.32", "versionType": "semver"}, {"status": "unaffected", "version": "4.14.326", "versionType": "semver", "lessThanOrEqual": "4.14.*"}, {"status": "unaffected", "version": "4.19.295", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.257", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.195", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.132", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.54", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.5.4", "versionType": "semver", "lessThanOrEqual": "6.5.*"}, {"status": "unaffected", "version": "6.6", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/video/fbdev/ep93xx-fb.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/ffdf2b020db717853167391a3a8d912e13428fa6"}, {"url": "https://git.kernel.org/stable/c/1c6ff2a7c593db851f23e31ace2baf557ea9d0ff"}, {"url": "https://git.kernel.org/stable/c/8ffa40ff64aa43a9a28fcf209b48d86a3e0f4972"}, {"url": "https://git.kernel.org/stable/c/4aade6c9100a3537788b6a9c7ac481037d19efdf"}, {"url": "https://git.kernel.org/stable/c/309c27162afea79b3c7f8747bb650faf6923b639"}, {"url": "https://git.kernel.org/stable/c/f83c1b13f8154e0284448912756d0a351a1a602a"}, {"url": "https://git.kernel.org/stable/c/0517fc5a71333b315164736bbd32608894fbb872"}, {"url": "https://git.kernel.org/stable/c/f90a0e5265b60cdd3c77990e8105f79aa2fac994"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev/ep93xx-fb: Do not assign to struct fb_info.dev\n\nDo not assing the Linux device to struct fb_info.dev. 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{"bugzilla": {"description": "kernel: fbdev/ep93xx-fb: Do not assign to struct fb_info.dev", "id": "2395870", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395870"}, "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"}, "details": ["No description is available for this CVE."], "name": "CVE-2023-53314", "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": "2025-09-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53314\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53314\nhttps://lore.kernel.org/linux-cve-announce/2025091643-CVE-2023-53314-b727@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-09-17T10:04:30.067818+00:00", "updated": "2025-09-17T10:04:30.067853+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}