{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-52741", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-21T15:19:24.233Z", "datePublished": "2024-05-21T15:23:03.867Z", "dateUpdated": "2026-08-05T09:11:10.506Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:11:10.506Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: Fix use-after-free in rdata->read_into_pages()\n\nWhen the network status is unstable, use-after-free may occur when\nread data from the server.\n\n BUG: KASAN: use-after-free in readpages_fill_pages+0x14c/0x7e0\n\n Call Trace:\n \n dump_stack_lvl+0x38/0x4c\n print_report+0x16f/0x4a6\n kasan_report+0xb7/0x130\n readpages_fill_pages+0x14c/0x7e0\n cifs_readv_receive+0x46d/0xa40\n cifs_demultiplex_thread+0x121c/0x1490\n kthread+0x16b/0x1a0\n ret_from_fork+0x2c/0x50\n \n\n Allocated by task 2535:\n kasan_save_stack+0x22/0x50\n kasan_set_track+0x25/0x30\n __kasan_kmalloc+0x82/0x90\n cifs_readdata_direct_alloc+0x2c/0x110\n cifs_readdata_alloc+0x2d/0x60\n cifs_readahead+0x393/0xfe0\n read_pages+0x12f/0x470\n page_cache_ra_unbounded+0x1b1/0x240\n filemap_get_pages+0x1c8/0x9a0\n filemap_read+0x1c0/0x540\n cifs_strict_readv+0x21b/0x240\n vfs_read+0x395/0x4b0\n ksys_read+0xb8/0x150\n do_syscall_64+0x3f/0x90\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\n Freed by task 79:\n kasan_save_stack+0x22/0x50\n kasan_set_track+0x25/0x30\n kasan_save_free_info+0x2e/0x50\n __kasan_slab_free+0x10e/0x1a0\n __kmem_cache_free+0x7a/0x1a0\n cifs_readdata_release+0x49/0x60\n process_one_work+0x46c/0x760\n worker_thread+0x2a4/0x6f0\n kthread+0x16b/0x1a0\n ret_from_fork+0x2c/0x50\n\n Last potentially related work creation:\n kasan_save_stack+0x22/0x50\n __kasan_record_aux_stack+0x95/0xb0\n insert_work+0x2b/0x130\n __queue_work+0x1fe/0x660\n queue_work_on+0x4b/0x60\n smb2_readv_callback+0x396/0x800\n cifs_abort_connection+0x474/0x6a0\n cifs_reconnect+0x5cb/0xa50\n cifs_readv_from_socket.cold+0x22/0x6c\n cifs_read_page_from_socket+0xc1/0x100\n readpages_fill_pages.cold+0x2f/0x46\n cifs_readv_receive+0x46d/0xa40\n cifs_demultiplex_thread+0x121c/0x1490\n kthread+0x16b/0x1a0\n ret_from_fork+0x2c/0x50\n\nThe following function calls will cause UAF of the rdata pointer.\n\nreadpages_fill_pages\n cifs_read_page_from_socket\n cifs_readv_from_socket\n cifs_reconnect\n __cifs_reconnect\n cifs_abort_connection\n mid->callback() --> smb2_readv_callback\n queue_work(&rdata->work) # if the worker completes first,\n # the rdata is freed\n cifs_readv_complete\n kref_put\n cifs_readdata_release\n kfree(rdata)\n return rdata->... # UAF in readpages_fill_pages()\n\nSimilarly, this problem also occurs in the uncache_fill_pages().\n\nFix this by adjusts the order of condition judgment in the return\nstatement." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - The UAF is in the CIFS/SMB client's demultiplex path (cifs_demultiplex_thread → cifs_readv_receive → readpages_fill_pages) while consuming a remote SMB read response; a malicious or compromised file server (or on-path attacker) triggers reconnect by dropping/resetting TCP/445 mid-read, matching other cifs client reconnect UAFs scored AV:N.\nAC:L - The attacker fully controls when to abort the connection during an in-flight read and can refuse reconnect so __cifs_reconnect hits msleep(3000), giving the workqueue ample time to free rdata before the return accesses it; retries are unbounded.\nPR:N - The attacker is the remote SMB peer (or MITM) and needs no credentials or privileges on the victim client; abort/reconnect runs in the cifsd kernel thread from protocol/transport behavior alone.\nUI:N - Against an already-established CIFS mount (fstab, autofs, systemd automount, container share), normal client readahead/reads plus attacker-induced disconnects trigger the path with no victim action at exploit time.\nS:U - The freed cifs_readdata object and resulting heap corruption stay within the host kernel's security authority and do not cross a VM, IOMMU, or sandbox boundary.\nC:H - Use-after-free of the heap-allocated rdata lets an attacker reclaim the slab and control the dangling rdata->got_bytes read (and related readdata state), yielding a kernel disclosure primitive per UAF guidance.\nI:H - The same UAF enables heap spraying/reclaim of cifs_readdata for write and control-flow hijack primitives, and a sprayed got_bytes can also divert post-reconnect mid handling into inconsistent success paths.\nA:H - The KASAN report shows a kernel use-after-free/oops in readpages_fill_pages on the freed rdata, so the bug denies availability even without further exploitation and is repeatedly triggerable by peer disconnects." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/cifs/file.c" ], "versions": [ { "version": "b3160aebb49b5e07f6bc3b8c5bed6013ca9e422e", "lessThan": "2b693fe3f760c87fd9768e759f6297f743a1b3b0", "status": "affected", "versionType": "git" }, { "version": "b3160aebb49b5e07f6bc3b8c5bed6013ca9e422e", "lessThan": "d1fba1e096ffc7ec11df863a97c50203c47315b9", "status": "affected", "versionType": "git" }, { "version": "b3160aebb49b5e07f6bc3b8c5bed6013ca9e422e", "lessThan": "3684a2f6affa1ca52a5d4a12f04d0652efdee65e", "status": "affected", "versionType": "git" }, { "version": "b3160aebb49b5e07f6bc3b8c5bed6013ca9e422e", "lessThan": "aa5465aeca3c66fecdf7efcf554aed79b4c4b211", "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/file.c" ], "versions": [ { "version": "3.17", "status": "affected" }, { "version": "0", "lessThan": "3.17", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.168", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.94", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.12", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2", "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": "3.17", "versionEndExcluding": "5.10.168" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.15.94" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.1.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/2b693fe3f760c87fd9768e759f6297f743a1b3b0" }, { "url": "https://git.kernel.org/stable/c/d1fba1e096ffc7ec11df863a97c50203c47315b9" }, { "url": "https://git.kernel.org/stable/c/3684a2f6affa1ca52a5d4a12f04d0652efdee65e" }, { "url": "https://git.kernel.org/stable/c/aa5465aeca3c66fecdf7efcf554aed79b4c4b211" } ], "title": "cifs: Fix use-after-free in rdata->read_into_pages()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CISA ADP Vulnrichment", "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2023-52741", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-05-28T15:46:03.268177Z" } } } ], "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:24:17.508Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T23:11:35.667Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/2b693fe3f760c87fd9768e759f6297f743a1b3b0", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/d1fba1e096ffc7ec11df863a97c50203c47315b9", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3684a2f6affa1ca52a5d4a12f04d0652efdee65e", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/aa5465aeca3c66fecdf7efcf554aed79b4c4b211", "tags": [ "x_transferred" ] } ] } ] } }