CVE-2023-53246

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An alternative would be to\navoid flagging S_AUTOMOUNT, etc. without CONFIG_CIFS_DFS_UPCALL. This\napproach was chosen as it provides more control over the error path."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/cifs/cifsfs.h"], "versions": [{"version": "25e195aa1e607f129ab912d29fcfc79239703307", "lessThan": "26a32a212bc540f4773cd6af8cf73e967d72569c", "status": "affected", "versionType": "git"}, {"version": "25e195aa1e607f129ab912d29fcfc79239703307", "lessThan": "b64305185b76f1d5145ce594ff48f3f0e70695bd", "status": "affected", "versionType": "git"}, {"version": "25e195aa1e607f129ab912d29fcfc79239703307", "lessThan": "b7d854c33ab48e55fc233699bbefe39ec9bb5c05", "status": "affected", "versionType": "git"}, {"version": "25e195aa1e607f129ab912d29fcfc79239703307", "lessThan": "1e144b68208e98fd4602c842a7149ba5f41d87fb", "status": "affected", "versionType": "git"}, {"version": "25e195aa1e607f129ab912d29fcfc79239703307", "lessThan": "179a88a8558bbf42991d361595281f3e45d7edfc", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/cifs/cifsfs.h"], "versions": [{"version": "5.7", "status": "affected"}, {"version": "0", "lessThan": "5.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.177", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.106", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.23", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2.10", "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": "5.7", "versionEndExcluding": "5.10.177"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.15.106"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.1.23"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/26a32a212bc540f4773cd6af8cf73e967d72569c"}, {"url": "https://git.kernel.org/stable/c/b64305185b76f1d5145ce594ff48f3f0e70695bd"}, {"url": "https://git.kernel.org/stable/c/b7d854c33ab48e55fc233699bbefe39ec9bb5c05"}, {"url": "https://git.kernel.org/stable/c/1e144b68208e98fd4602c842a7149ba5f41d87fb"}, {"url": "https://git.kernel.org/stable/c/179a88a8558bbf42991d361595281f3e45d7edfc"}], "title": "cifs: fix DFS traversal oops without CONFIG_CIFS_DFS_UPCALL", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/cifs/cifsfs.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "26a32a212bc540f4773cd6af8cf73e967d72569c", "status": "affected", "version": "25e195aa1e607f129ab912d29fcfc79239703307", "versionType": "git"}, {"lessThan": "b64305185b76f1d5145ce594ff48f3f0e70695bd", "status": "affected", "version": "25e195aa1e607f129ab912d29fcfc79239703307", "versionType": "git"}, {"lessThan": "b7d854c33ab48e55fc233699bbefe39ec9bb5c05", "status": "affected", "version": "25e195aa1e607f129ab912d29fcfc79239703307", "versionType": "git"}, {"lessThan": "1e144b68208e98fd4602c842a7149ba5f41d87fb", "status": "affected", "version": "25e195aa1e607f129ab912d29fcfc79239703307", "versionType": "git"}, {"lessThan": "179a88a8558bbf42991d361595281f3e45d7edfc", "status": "affected", "version": "25e195aa1e607f129ab912d29fcfc79239703307", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/cifs/cifsfs.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"lessThan": "5.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.177", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.106", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.23", "versionType": "semver"}, {"lessThanOrEqual": "6.2.*", "status": "unaffected", "version": "6.2.10", "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": "4E7A726D-F38C-4B26-9A67-3BDE46858903", "versionEndExcluding": "4.14.312", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B8449DA5-0637-406C-99C3-84AF4CB5F3EB", "versionEndExcluding": "4.19.280", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2C5F51A3-AEBF-4E51-AA58-D8C8B4554A86", "versionEndExcluding": "5.4.240", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9FED8369-E7A1-48C6-9700-6ADEDEC371F7", "versionEndExcluding": "5.10.177", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "46A62903-B927-42D9-88F8-7F39EC9BC23B", "versionEndExcluding": "5.15.106", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C6396026-EF6B-4933-AF27-B3AFE6E5506D", "versionEndExcluding": "6.1.23", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5178A008-E2D6-4093-BCD4-8A80523EE39E", "versionEndExcluding": "6.2.10", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*", "matchCriteriaId": "B8E3B0E8-FA27-4305-87BB-AF6C25B160CB", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*", "matchCriteriaId": "A47F0FC3-CE52-4BA1-BA51-22F783938431", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:*", "matchCriteriaId": "3583026A-27EC-4A4C-850A-83F2AF970673", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc4:*:*:*:*:*:*", "matchCriteriaId": "DC271202-7570-4505-89A4-D602D47BFD00", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix DFS traversal oops without CONFIG_CIFS_DFS_UPCALL\n\nWhen compiled with CONFIG_CIFS_DFS_UPCALL disabled, cifs_dfs_d_automount\nis NULL. cifs.ko logic for mapping CIFS_FATTR_DFS_REFERRAL attributes to\nS_AUTOMOUNT and corresponding dentry flags is retained regardless of\nCONFIG_CIFS_DFS_UPCALL, leading to a NULL pointer dereference in\nVFS follow_automount() when traversing a DFS referral link:\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n ...\n Call Trace:\n <TASK>\n __traverse_mounts+0xb5/0x220\n ? cifs_revalidate_mapping+0x65/0xc0 [cifs]\n step_into+0x195/0x610\n ? lookup_fast+0xe2/0xf0\n path_lookupat+0x64/0x140\n filename_lookup+0xc2/0x140\n ? __create_object+0x299/0x380\n ? kmem_cache_alloc+0x119/0x220\n ? user_path_at_empty+0x31/0x50\n user_path_at_empty+0x31/0x50\n __x64_sys_chdir+0x2a/0xd0\n ? exit_to_user_mode_prepare+0xca/0x100\n do_syscall_64+0x42/0x90\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nThis fix adds an inline cifs_dfs_d_automount() {return -EREMOTE} handler\nwhen CONFIG_CIFS_DFS_UPCALL is disabled. An alternative would be to\navoid flagging S_AUTOMOUNT, etc. without CONFIG_CIFS_DFS_UPCALL. This\napproach was chosen as it provides more control over the error path."}], "id": "CVE-2023-53246", "lastModified": "2026-06-17T06:44:37.347", "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"}]}, "published": "2025-09-15T15:15:51.803", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/179a88a8558bbf42991d361595281f3e45d7edfc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1e144b68208e98fd4602c842a7149ba5f41d87fb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/26a32a212bc540f4773cd6af8cf73e967d72569c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b64305185b76f1d5145ce594ff48f3f0e70695bd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b7d854c33ab48e55fc233699bbefe39ec9bb5c05"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: cifs: fix DFS traversal oops without CONFIG_CIFS_DFS_UPCALL", "id": "2395404", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395404"}, "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-2023-53246", "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"}], "public_date": "2025-09-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53246\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53246\nhttps://lore.kernel.org/linux-cve-announce/2025091501-CVE-2023-53246-a539@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-09-17T10:07:46.634615+00:00", "updated": "2025-09-17T10:07:46.634669+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}