CVE-2023-53511

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-53511", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-01T11:39:39.406Z", "datePublished": "2025-10-01T11:46:00.185Z", "dateUpdated": "2026-11-05T20:31:12.425Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:29:17.822Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fix fget leak when fs don't support nowait buffered read\n\nHeming reported a BUG when using io_uring doing link-cp on ocfs2. [1]\n\nDo the following steps can reproduce this BUG:\nmount -t ocfs2 /dev/vdc /mnt/ocfs2\ncp testfile /mnt/ocfs2/\n./link-cp /mnt/ocfs2/testfile /mnt/ocfs2/testfile.1\numount /mnt/ocfs2\n\nThen umount will fail, and it outputs:\numount: /mnt/ocfs2: target is busy.\n\nWhile tracing umount, it blames mnt_get_count() not return as expected.\nDo a deep investigation for fget()/fput() on related code flow, I've\nfinally found that fget() leaks since ocfs2 doesn't support nowait\nbuffered read.\n\nio_issue_sqe\n|-io_assign_file // do fget() first\n |-io_read\n |-io_iter_do_read\n |-ocfs2_file_read_iter // return -EOPNOTSUPP\n |-kiocb_done\n |-io_rw_done\n |-__io_complete_rw_common // set REQ_F_REISSUE\n |-io_resubmit_prep\n |-io_req_prep_async // override req->file, leak happens\n\nThis was introduced by commit a196c78b5443 in v5.18. Fix it by don't\nre-assign req->file if it has already been assigned.\n\n[1] https://lore.kernel.org/ocfs2-devel/ab580a75-91c8-d68a-3455-40361be1bfa8@linux.alibaba.com/T/#t"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["io_uring/io_uring.c"], "versions": [{"version": "a196c78b5443fc61af2c0490213b9d125482cbd1", "lessThan": "75a499fc9d66a32271e2b3e4ca71156e8ad3b484", "status": "affected", "versionType": "git"}, {"version": "a196c78b5443fc61af2c0490213b9d125482cbd1", "lessThan": "10fb2e16ee6ffaf1716b9e90d007e6b300bfa457", "status": "affected", "versionType": "git"}, {"version": "a196c78b5443fc61af2c0490213b9d125482cbd1", "lessThan": "54aa7f2330b82884f4a1afce0220add6e8312f8b", "status": "affected", "versionType": "git"}, {"version": "cef27a7d36026bd3c86f4fdfb4611ebbe2814af4", "status": "affected", "versionType": "git"}, {"version": "5.17.9", "lessThan": "5.18", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["io_uring/io_uring.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.16", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2.3", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.3", "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": "5.18", "versionEndExcluding": "6.1.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.2.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17.9"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/75a499fc9d66a32271e2b3e4ca71156e8ad3b484"}, {"url": "https://git.kernel.org/stable/c/10fb2e16ee6ffaf1716b9e90d007e6b300bfa457"}, {"url": "https://git.kernel.org/stable/c/54aa7f2330b82884f4a1afce0220add6e8312f8b"}], "title": "io_uring: fix fget leak when fs don't support nowait buffered read", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-53511", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T20:22:39.001478Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-05T20:31:12.425Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-53511", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T20:22:39.001478Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-05T20:22:39.918Z"}}], "cna": {"title": "io_uring: fix fget leak when fs don't support nowait buffered read", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "a196c78b5443fc61af2c0490213b9d125482cbd1", "lessThan": "75a499fc9d66a32271e2b3e4ca71156e8ad3b484", "versionType": "git"}, {"status": "affected", "version": "a196c78b5443fc61af2c0490213b9d125482cbd1", "lessThan": "10fb2e16ee6ffaf1716b9e90d007e6b300bfa457", "versionType": "git"}, {"status": "affected", "version": "a196c78b5443fc61af2c0490213b9d125482cbd1", "lessThan": "54aa7f2330b82884f4a1afce0220add6e8312f8b", "versionType": "git"}, {"status": "affected", "version": "cef27a7d36026bd3c86f4fdfb4611ebbe2814af4", "versionType": "git"}, {"status": "affected", "version": "5.17.9", "lessThan": "5.18", "versionType": "semver"}], "programFiles": ["io_uring/io_uring.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"status": "unaffected", "version": "0", "lessThan": "5.18", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.16", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.2.3", "versionType": "semver", "lessThanOrEqual": "6.2.*"}, {"status": "unaffected", "version": "6.3", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["io_uring/io_uring.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/75a499fc9d66a32271e2b3e4ca71156e8ad3b484"}, {"url": "https://git.kernel.org/stable/c/10fb2e16ee6ffaf1716b9e90d007e6b300bfa457"}, {"url": "https://git.kernel.org/stable/c/54aa7f2330b82884f4a1afce0220add6e8312f8b"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fix fget leak when fs don't support nowait buffered read\n\nHeming reported a BUG when using io_uring doing link-cp on ocfs2. [1]\n\nDo the following steps can reproduce this BUG:\nmount -t ocfs2 /dev/vdc /mnt/ocfs2\ncp testfile /mnt/ocfs2/\n./link-cp /mnt/ocfs2/testfile /mnt/ocfs2/testfile.1\numount /mnt/ocfs2\n\nThen umount will fail, and it outputs:\numount: /mnt/ocfs2: target is busy.\n\nWhile tracing umount, it blames mnt_get_count() not return as expected.\nDo a deep investigation for fget()/fput() on related code flow, I've\nfinally found that fget() leaks since ocfs2 doesn't support nowait\nbuffered read.\n\nio_issue_sqe\n|-io_assign_file // do fget() first\n |-io_read\n |-io_iter_do_read\n |-ocfs2_file_read_iter // return -EOPNOTSUPP\n |-kiocb_done\n |-io_rw_done\n |-__io_complete_rw_common // set REQ_F_REISSUE\n |-io_resubmit_prep\n |-io_req_prep_async // override req->file, leak happens\n\nThis was introduced by commit a196c78b5443 in v5.18. Fix it by don't\nre-assign req->file if it has already been assigned.\n\n[1] https://lore.kernel.org/ocfs2-devel/ab580a75-91c8-d68a-3455-40361be1bfa8@linux.alibaba.com/T/#t"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.16", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.2.3", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.3", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.17.9"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:29:17.822Z"}}}, "cveMetadata": {"cveId": "CVE-2023-53511", "state": "PUBLISHED", "dateUpdated": "2026-11-05T20:31:12.425Z", "dateReserved": "2025-10-01T11:39:39.406Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-10-01T11:46:00.185Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["io_uring/io_uring.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "75a499fc9d66a32271e2b3e4ca71156e8ad3b484", "status": "affected", "version": "a196c78b5443fc61af2c0490213b9d125482cbd1", "versionType": "git"}, {"lessThan": "10fb2e16ee6ffaf1716b9e90d007e6b300bfa457", "status": "affected", "version": "a196c78b5443fc61af2c0490213b9d125482cbd1", "versionType": "git"}, {"lessThan": "54aa7f2330b82884f4a1afce0220add6e8312f8b", "status": "affected", "version": "a196c78b5443fc61af2c0490213b9d125482cbd1", "versionType": "git"}, {"status": "affected", "version": "cef27a7d36026bd3c86f4fdfb4611ebbe2814af4", "versionType": "git"}, {"lessThan": "5.18", "status": "affected", "version": "5.17.9", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["io_uring/io_uring.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"lessThan": "5.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.16", "versionType": "semver"}, {"lessThanOrEqual": "6.2.*", "status": "unaffected", "version": "6.2.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "237FF665-63EB-4FB8-B2DC-5BD5D79B8053", "versionEndExcluding": "5.18", "versionStartIncluding": "5.17.9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2EF76361-0A42-48AE-BC0D-99DAB44B5118", "versionEndExcluding": "6.1.16", "versionStartIncluding": "5.18.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "88C67289-22AD-4CA9-B202-5F5A80E5BA4B", "versionEndExcluding": "6.2.3", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:*", "matchCriteriaId": "0384FA0A-DE99-48D7-84E3-46ED0C3B5E03", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc6:*:*:*:*:*:*", "matchCriteriaId": "EE723F14-047B-4FCF-B109-E0542EDFB063", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc7:*:*:*:*:*:*", "matchCriteriaId": "2FCFCE58-5118-4D05-864E-C82CF20EABE5", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fix fget leak when fs don't support nowait buffered read\n\nHeming reported a BUG when using io_uring doing link-cp on ocfs2. [1]\n\nDo the following steps can reproduce this BUG:\nmount -t ocfs2 /dev/vdc /mnt/ocfs2\ncp testfile /mnt/ocfs2/\n./link-cp /mnt/ocfs2/testfile /mnt/ocfs2/testfile.1\numount /mnt/ocfs2\n\nThen umount will fail, and it outputs:\numount: /mnt/ocfs2: target is busy.\n\nWhile tracing umount, it blames mnt_get_count() not return as expected.\nDo a deep investigation for fget()/fput() on related code flow, I've\nfinally found that fget() leaks since ocfs2 doesn't support nowait\nbuffered read.\n\nio_issue_sqe\n|-io_assign_file // do fget() first\n |-io_read\n |-io_iter_do_read\n |-ocfs2_file_read_iter // return -EOPNOTSUPP\n |-kiocb_done\n |-io_rw_done\n |-__io_complete_rw_common // set REQ_F_REISSUE\n |-io_resubmit_prep\n |-io_req_prep_async // override req->file, leak happens\n\nThis was introduced by commit a196c78b5443 in v5.18. Fix it by don't\nre-assign req->file if it has already been assigned.\n\n[1] https://lore.kernel.org/ocfs2-devel/ab580a75-91c8-d68a-3455-40361be1bfa8@linux.alibaba.com/T/#t"}], "id": "CVE-2023-53511", "lastModified": "2026-11-05T21:17:23.700", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-53511", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T20:22:39.001478Z", "version": "2.0.3"}}]}, "published": "2025-10-01T12:15:55.030", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/10fb2e16ee6ffaf1716b9e90d007e6b300bfa457"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/54aa7f2330b82884f4a1afce0220add6e8312f8b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/75a499fc9d66a32271e2b3e4ca71156e8ad3b484"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: io_uring: fix fget leak when fs don't support nowait buffered read", "id": "2400770", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2400770"}, "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-2023-53511", "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": "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:/o:redhat:rhivos:1", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53511\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53511\nhttps://lore.kernel.org/linux-cve-announce/2025100130-CVE-2023-53511-99e8@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-10-02T08:38:29.191228+00:00", "updated": "2025-10-02T08:38:29.191299+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}