{ "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-2023-52803", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-52803", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2024-05-21T15:31:15.063Z", "updatedAt": "2026-05-11T19:33:24.871Z", "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": "SUNRPC: Fix RPC client cleaned up the freed pipefs dentries", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: Fix RPC client cleaned up the freed pipefs dentries\n\nRPC client pipefs dentries cleanup is in separated rpc_remove_pipedir()\nworkqueue,which takes care about pipefs superblock locking.\nIn some special scenarios, when kernel frees the pipefs sb of the\ncurrent client and immediately alloctes a new pipefs sb,\nrpc_remove_pipedir function would misjudge the existence of pipefs\nsb which is not the one it used to hold. As a result,\nthe rpc_remove_pipedir would clean the released freed pipefs dentries.\n\nTo fix this issue, rpc_remove_pipedir should check whether the\ncurrent pipefs sb is consistent with the original pipefs sb.\n\nThis error can be catched by KASAN:\n=========================================================\n[ 250.497700] BUG: KASAN: slab-use-after-free in dget_parent+0x195/0x200\n[ 250.498315] Read of size 4 at addr ffff88800a2ab804 by task kworker/0:18/106503\n[ 250.500549] Workqueue: events rpc_free_client_work\n[ 250.501001] Call Trace:\n[ 250.502880] kasan_report+0xb6/0xf0\n[ 250.503209] ? dget_parent+0x195/0x200\n[ 250.503561] dget_parent+0x195/0x200\n[ 250.503897] ? __pfx_rpc_clntdir_depopulate+0x10/0x10\n[ 250.504384] rpc_rmdir_depopulate+0x1b/0x90\n[ 250.504781] rpc_remove_client_dir+0xf5/0x150\n[ 250.505195] rpc_free_client_work+0xe4/0x230\n[ 250.505598] process_one_work+0x8ee/0x13b0\n...\n[ 22.039056] Allocated by task 244:\n[ 22.039390] kasan_save_stack+0x22/0x50\n[ 22.039758] kasan_set_track+0x25/0x30\n[ 22.040109] __kasan_slab_alloc+0x59/0x70\n[ 22.040487] kmem_cache_alloc_lru+0xf0/0x240\n[ 22.040889] __d_alloc+0x31/0x8e0\n[ 22.041207] d_alloc+0x44/0x1f0\n[ 22.041514] __rpc_lookup_create_exclusive+0x11c/0x140\n[ 22.041987] rpc_mkdir_populate.constprop.0+0x5f/0x110\n[ 22.042459] rpc_create_client_dir+0x34/0x150\n[ 22.042874] rpc_setup_pipedir_sb+0x102/0x1c0\n[ 22.043284] rpc_client_register+0x136/0x4e0\n[ 22.043689] rpc_new_client+0x911/0x1020\n[ 22.044057] rpc_create_xprt+0xcb/0x370\n[ 22.044417] rpc_create+0x36b/0x6c0\n...\n[ 22.049524] Freed by task 0:\n[ 22.049803] kasan_save_stack+0x22/0x50\n[ 22.050165] kasan_set_track+0x25/0x30\n[ 22.050520] kasan_save_free_info+0x2b/0x50\n[ 22.050921] __kasan_slab_free+0x10e/0x1a0\n[ 22.051306] kmem_cache_free+0xa5/0x390\n[ 22.051667] rcu_core+0x62c/0x1930\n[ 22.051995] __do_softirq+0x165/0x52a\n[ 22.052347]\n[ 22.052503] Last potentially related work creation:\n[ 22.052952] kasan_save_stack+0x22/0x50\n[ 22.053313] __kasan_record_aux_stack+0x8e/0xa0\n[ 22.053739] __call_rcu_common.constprop.0+0x6b/0x8b0\n[ 22.054209] dentry_free+0xb2/0x140\n[ 22.054540] __dentry_kill+0x3be/0x540\n[ 22.054900] shrink_dentry_list+0x199/0x510\n[ 22.055293] shrink_dcache_parent+0x190/0x240\n[ 22.055703] do_one_tree+0x11/0x40\n[ 22.056028] shrink_dcache_for_umount+0x61/0x140\n[ 22.056461] generic_shutdown_super+0x70/0x590\n[ 22.056879] kill_anon_super+0x3a/0x60\n[ 22.057234] rpc_kill_sb+0x121/0x200", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "0157d021d23a087eecfa830502f81cfe843f0d16", "status": "affected", "versionType": "git", "lessThan": "17866066b8ac1cc38fb449670bc15dc9fee4b40a" }, { "version": "0157d021d23a087eecfa830502f81cfe843f0d16", "status": "affected", "versionType": "git", "lessThan": "7d61d1da2ed1f682c41cae0c8d4719cdaccee5c5" }, { "version": "0157d021d23a087eecfa830502f81cfe843f0d16", "status": "affected", "versionType": "git", "lessThan": "dedf2a0eb9448ae73b270743e6ea9b108189df46" }, { "version": "0157d021d23a087eecfa830502f81cfe843f0d16", "status": "affected", "versionType": "git", "lessThan": "194454afa6aa9d6ed74f0c57127bc8beb27c20df" }, { "version": "0157d021d23a087eecfa830502f81cfe843f0d16", "status": "affected", "versionType": "git", "lessThan": "7749fd2dbef72a52b5c9ffdbf877691950ed4680" }, { "version": "0157d021d23a087eecfa830502f81cfe843f0d16", "status": "affected", "versionType": "git", "lessThan": "1cdb52ffd6600a37bd355d8dce58ecd03e55e618" }, { "version": "0157d021d23a087eecfa830502f81cfe843f0d16", "status": "affected", "versionType": "git", "lessThan": "cc2e7ebbeb1d0601f7f3c8d93b78fcc03a95e44a" }, { "version": "0157d021d23a087eecfa830502f81cfe843f0d16", "status": "affected", "versionType": "git", "lessThan": "bfca5fb4e97c46503ddfc582335917b0cc228264" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.4", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.4" }, { "version": "4.19.318", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.280", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.202", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.140", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.64", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.5.13", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.5.*" }, { "version": "6.6.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.7", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }