{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-52434", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-52434", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2024-02-20T18:04:44.006Z", "updatedAt": "2026-08-05T09:09:53.429Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "smb: client: fix potential OOBs in smb2_parse_contexts()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential OOBs in smb2_parse_contexts()\n\nValidate offsets and lengths before dereferencing create contexts in\nsmb2_parse_contexts().\n\nThis fixes following oops when accessing invalid create contexts from\nserver:\n\n BUG: unable to handle page fault for address: ffff8881178d8cc3\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 4a01067 P4D 4a01067 PUD 0\n Oops: 0000 [#1] PREEMPT SMP NOPTI\n CPU: 3 PID: 1736 Comm: mount.cifs Not tainted 6.7.0-rc4 #1\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\n rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014\n RIP: 0010:smb2_parse_contexts+0xa0/0x3a0 [cifs]\n Code: f8 10 75 13 48 b8 93 ad 25 50 9c b4 11 e7 49 39 06 0f 84 d2 00\n 00 00 8b 45 00 85 c0 74 61 41 29 c5 48 01 c5 41 83 fd 0f 76 55 <0f> b7\n 7d 04 0f b7 45 06 4c 8d 74 3d 00 66 83 f8 04 75 bc ba 04 00\n RSP: 0018:ffffc900007939e0 EFLAGS: 00010216\n RAX: ffffc90000793c78 RBX: ffff8880180cc000 RCX: ffffc90000793c90\n RDX: ffffc90000793cc0 RSI: ffff8880178d8cc0 RDI: ffff8880180cc000\n RBP: ffff8881178d8cbf R08: ffffc90000793c22 R09: 0000000000000000\n R10: ffff8880180cc000 R11: 0000000000000024 R12: 0000000000000000\n R13: 0000000000000020 R14: 0000000000000000 R15: ffffc90000793c22\n FS: 00007f873753cbc0(0000) GS:ffff88806bc00000(0000)\n knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: ffff8881178d8cc3 CR3: 00000000181ca000 CR4: 0000000000750ef0\n PKRU: 55555554\n Call Trace:\n \n ? __die+0x23/0x70\n ? page_fault_oops+0x181/0x480\n ? search_module_extables+0x19/0x60\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? exc_page_fault+0x1b6/0x1c0\n ? asm_exc_page_fault+0x26/0x30\n ? smb2_parse_contexts+0xa0/0x3a0 [cifs]\n SMB2_open+0x38d/0x5f0 [cifs]\n ? smb2_is_path_accessible+0x138/0x260 [cifs]\n smb2_is_path_accessible+0x138/0x260 [cifs]\n cifs_is_path_remote+0x8d/0x230 [cifs]\n cifs_mount+0x7e/0x350 [cifs]\n cifs_smb3_do_mount+0x128/0x780 [cifs]\n smb3_get_tree+0xd9/0x290 [cifs]\n vfs_get_tree+0x2c/0x100\n ? capable+0x37/0x70\n path_mount+0x2d7/0xb80\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? _raw_spin_unlock_irqrestore+0x44/0x60\n __x64_sys_mount+0x11a/0x150\n do_syscall_64+0x47/0xf0\n entry_SYSCALL_64_after_hwframe+0x6f/0x77\n RIP: 0033:0x7f8737657b1e", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "b8c32dbb0deb287a5fcb78251e4eae6c7275760d", "status": "affected", "versionType": "git", "lessThan": "6726429c18c62dbf5e96ebbd522f262e016553fb" }, { "version": "b8c32dbb0deb287a5fcb78251e4eae6c7275760d", "status": "affected", "versionType": "git", "lessThan": "13fb0fc4917621f3dfa285a27eaf7151d770b5e5" }, { "version": "b8c32dbb0deb287a5fcb78251e4eae6c7275760d", "status": "affected", "versionType": "git", "lessThan": "890bc4fac3c0973a49cac35f634579bebba7fe48" }, { "version": "b8c32dbb0deb287a5fcb78251e4eae6c7275760d", "status": "affected", "versionType": "git", "lessThan": "1ae3c59355dc9882e09c020afe8ffbd895ad0f29" }, { "version": "b8c32dbb0deb287a5fcb78251e4eae6c7275760d", "status": "affected", "versionType": "git", "lessThan": "17a0f64cc02d4972e21c733d9f21d1c512963afa" }, { "version": "b8c32dbb0deb287a5fcb78251e4eae6c7275760d", "status": "affected", "versionType": "git", "lessThan": "af1689a9b7701d9907dfc84d2a4b57c4bc907144" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.7", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.7" }, { "version": "5.4.277", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.211", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.150", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.79", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.8", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.7", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }