CVE-2023-52803 (GCVE-0-2023-52803)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:31 – Updated: 2026-05-11 19:33
VLAI
Title
SUNRPC: Fix RPC client cleaned up the freed pipefs dentries
Summary
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Fix RPC client cleaned up the freed pipefs dentries RPC client pipefs dentries cleanup is in separated rpc_remove_pipedir() workqueue,which takes care about pipefs superblock locking. In some special scenarios, when kernel frees the pipefs sb of the current client and immediately alloctes a new pipefs sb, rpc_remove_pipedir function would misjudge the existence of pipefs sb which is not the one it used to hold. As a result, the rpc_remove_pipedir would clean the released freed pipefs dentries. To fix this issue, rpc_remove_pipedir should check whether the current pipefs sb is consistent with the original pipefs sb. This error can be catched by KASAN: ========================================================= [ 250.497700] BUG: KASAN: slab-use-after-free in dget_parent+0x195/0x200 [ 250.498315] Read of size 4 at addr ffff88800a2ab804 by task kworker/0:18/106503 [ 250.500549] Workqueue: events rpc_free_client_work [ 250.501001] Call Trace: [ 250.502880] kasan_report+0xb6/0xf0 [ 250.503209] ? dget_parent+0x195/0x200 [ 250.503561] dget_parent+0x195/0x200 [ 250.503897] ? __pfx_rpc_clntdir_depopulate+0x10/0x10 [ 250.504384] rpc_rmdir_depopulate+0x1b/0x90 [ 250.504781] rpc_remove_client_dir+0xf5/0x150 [ 250.505195] rpc_free_client_work+0xe4/0x230 [ 250.505598] process_one_work+0x8ee/0x13b0 ... [ 22.039056] Allocated by task 244: [ 22.039390] kasan_save_stack+0x22/0x50 [ 22.039758] kasan_set_track+0x25/0x30 [ 22.040109] __kasan_slab_alloc+0x59/0x70 [ 22.040487] kmem_cache_alloc_lru+0xf0/0x240 [ 22.040889] __d_alloc+0x31/0x8e0 [ 22.041207] d_alloc+0x44/0x1f0 [ 22.041514] __rpc_lookup_create_exclusive+0x11c/0x140 [ 22.041987] rpc_mkdir_populate.constprop.0+0x5f/0x110 [ 22.042459] rpc_create_client_dir+0x34/0x150 [ 22.042874] rpc_setup_pipedir_sb+0x102/0x1c0 [ 22.043284] rpc_client_register+0x136/0x4e0 [ 22.043689] rpc_new_client+0x911/0x1020 [ 22.044057] rpc_create_xprt+0xcb/0x370 [ 22.044417] rpc_create+0x36b/0x6c0 ... [ 22.049524] Freed by task 0: [ 22.049803] kasan_save_stack+0x22/0x50 [ 22.050165] kasan_set_track+0x25/0x30 [ 22.050520] kasan_save_free_info+0x2b/0x50 [ 22.050921] __kasan_slab_free+0x10e/0x1a0 [ 22.051306] kmem_cache_free+0xa5/0x390 [ 22.051667] rcu_core+0x62c/0x1930 [ 22.051995] __do_softirq+0x165/0x52a [ 22.052347] [ 22.052503] Last potentially related work creation: [ 22.052952] kasan_save_stack+0x22/0x50 [ 22.053313] __kasan_record_aux_stack+0x8e/0xa0 [ 22.053739] __call_rcu_common.constprop.0+0x6b/0x8b0 [ 22.054209] dentry_free+0xb2/0x140 [ 22.054540] __dentry_kill+0x3be/0x540 [ 22.054900] shrink_dentry_list+0x199/0x510 [ 22.055293] shrink_dcache_parent+0x190/0x240 [ 22.055703] do_one_tree+0x11/0x40 [ 22.056028] shrink_dcache_for_umount+0x61/0x140 [ 22.056461] generic_shutdown_super+0x70/0x590 [ 22.056879] kill_anon_super+0x3a/0x60 [ 22.057234] rpc_kill_sb+0x121/0x200
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0157d021d23a087eecfa830502f81cfe843f0d16 , < 17866066b8ac1cc38fb449670bc15dc9fee4b40a (git)
Affected: 0157d021d23a087eecfa830502f81cfe843f0d16 , < 7d61d1da2ed1f682c41cae0c8d4719cdaccee5c5 (git)
Affected: 0157d021d23a087eecfa830502f81cfe843f0d16 , < dedf2a0eb9448ae73b270743e6ea9b108189df46 (git)
Affected: 0157d021d23a087eecfa830502f81cfe843f0d16 , < 194454afa6aa9d6ed74f0c57127bc8beb27c20df (git)
Affected: 0157d021d23a087eecfa830502f81cfe843f0d16 , < 7749fd2dbef72a52b5c9ffdbf877691950ed4680 (git)
Affected: 0157d021d23a087eecfa830502f81cfe843f0d16 , < 1cdb52ffd6600a37bd355d8dce58ecd03e55e618 (git)
Affected: 0157d021d23a087eecfa830502f81cfe843f0d16 , < cc2e7ebbeb1d0601f7f3c8d93b78fcc03a95e44a (git)
Affected: 0157d021d23a087eecfa830502f81cfe843f0d16 , < bfca5fb4e97c46503ddfc582335917b0cc228264 (git)
Create a notification for this product.
Linux Linux Affected: 3.4
Unaffected: 0 , < 3.4 (semver)
Unaffected: 4.19.318 , ≤ 4.19.* (semver)
Unaffected: 5.4.280 , ≤ 5.4.* (semver)
Unaffected: 5.10.202 , ≤ 5.10.* (semver)
Unaffected: 5.15.140 , ≤ 5.15.* (semver)
Unaffected: 6.1.64 , ≤ 6.1.* (semver)
Unaffected: 6.5.13 , ≤ 6.5.* (semver)
Unaffected: 6.6.3 , ≤ 6.6.* (semver)
Unaffected: 6.7 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "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"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52803\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T16:15:18.753\",\"lastModified\":\"2026-06-17T06:43:36.997\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: SUNRPC: el cliente RPC limpi\u00f3 los pipefs dentries liberados. La limpieza de pipefs dentries del cliente RPC est\u00e1 en la cola de trabajo separada rpc_remove_pipedir(), que se encarga del bloqueo del superbloque de pipefs. En algunos escenarios especiales, cuando el kernel libera el pipefs sb del cliente actual e inmediatamente asigna un nuevo pipefs sb, la funci\u00f3n rpc_remove_pipedir juzgar\u00eda mal la existencia de pipefs sb que no es el que sol\u00eda contener. Como resultado, rpc_remove_pipedir limpiar\u00eda las dentr\u00edas de pipefs liberadas. Para solucionar este problema, rpc_remove_pipedir debe verificar si el pipefs sb actual es consistente con el pipefs sb original. KASAN puede detectar este error: ============================================ =============== [250.497700] BUG: KASAN: slab-use-after-free en dget_parent+0x195/0x200 [250.498315] Lectura de tama\u00f1o 4 en la direcci\u00f3n ffff88800a2ab804 por tarea kworker/0 :18/106503 [250.500549] Cola de trabajo: eventos rpc_free_client_work [250.501001] Seguimiento de llamadas: [250.502880] kasan_report+0xb6/0xf0 [250.503209]? dget_parent+0x195/0x200 [ 250.503561] dget_parent+0x195/0x200 [ 250.503897] ? __pfx_rpc_clntdir_depopulate+0x10/0x10 [ 250.504384] rpc_rmdir_depopulate+0x1b/0x90 [ 250.504781] rpc_remove_client_dir+0xf5/0x150 [ 250.505195] /0x230 [ 250.505598] Process_one_work+0x8ee/0x13b0 ... [ 22.039056] Asignado por la tarea 244: [ 22.039390 ] kasan_save_stack+0x22/0x50 [ 22.039758] kasan_set_track+0x25/0x30 [ 22.040109] __kasan_slab_alloc+0x59/0x70 [ 22.040487] kmem_cache_alloc_lru+0xf0/0x240 [ 22.0408 89] __d_alloc+0x31/0x8e0 [ 22.041207] d_alloc+0x44/0x1f0 [ 22.041514] __rpc_lookup_create_exclusive +0x11c/0x140 [ 22.041987] rpc_mkdir_populate.constprop.0+0x5f/0x110 [ 22.042459] rpc_create_client_dir+0x34/0x150 [ 22.042874] rpc_setup_pipedir_sb+0x102/0x1c0 [ 22.043284] rpc_client_register+0x136/0x4e0 [ 22.043689] rpc_new_client+0x911/0x1020 [ 22.044057 ] rpc_create_xprt+0xcb/0x370 [ 22.044417] rpc_create+0x36b/0x6c0 ... [ 22.049524] Liberado por la tarea 0: [ 22.049803] kasan_save_stack+0x22/0x50 [ 22.050165] 25/0x30 [ 22.050520] kasan_save_free_info+0x2b/0x50 [ 22.050921] __kasan_slab_free+0x10e/0x1a0 [ 22.051306] kmem_cache_free+0xa5/0x390 [ 22.051667] rcu_core+0x62c/0x1930 [ 22.051995] __do_softirq+0x165/0x52a [ 22.052347] [ 22.052503] \u00daltima creaci\u00f3n de trabajo potencialmente relacionado: [ 22.052952] kasan_save_stack+0x22/ 0x50 [ 22.053313] __kasan_record_aux_stack+0x8e/0xa0 [ 22.053739] __call_rcu_common.constprop.0+0x6b/0x8b0 [ 22.054209] dentry_free+0xb2/0x140 [ __dentry_kill+ 0x3be/0x540 [22.054900] Shrink_dentry_list+0x199/0x510 [22.055293] Shrink_dcache_parent+ 0x190/0x240 [ 22.055703] do_one_tree+0x11/0x40 [ 22.056028] shrink_dcache_for_umount+0x61/0x140 [ 22.056461] generic_shutdown_super+0x70/0x590 [ 22.056879] 3a/0x60 [22.057234] rpc_kill_sb+0x121/0x200\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"include/linux/sunrpc/clnt.h\",\"net/sunrpc/clnt.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"0157d021d23a087eecfa830502f81cfe843f0d16\",\"lessThan\":\"17866066b8ac1cc38fb449670bc15dc9fee4b40a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0157d021d23a087eecfa830502f81cfe843f0d16\",\"lessThan\":\"7d61d1da2ed1f682c41cae0c8d4719cdaccee5c5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0157d021d23a087eecfa830502f81cfe843f0d16\",\"lessThan\":\"dedf2a0eb9448ae73b270743e6ea9b108189df46\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0157d021d23a087eecfa830502f81cfe843f0d16\",\"lessThan\":\"194454afa6aa9d6ed74f0c57127bc8beb27c20df\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0157d021d23a087eecfa830502f81cfe843f0d16\",\"lessThan\":\"7749fd2dbef72a52b5c9ffdbf877691950ed4680\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0157d021d23a087eecfa830502f81cfe843f0d16\",\"lessThan\":\"1cdb52ffd6600a37bd355d8dce58ecd03e55e618\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0157d021d23a087eecfa830502f81cfe843f0d16\",\"lessThan\":\"cc2e7ebbeb1d0601f7f3c8d93b78fcc03a95e44a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0157d021d23a087eecfa830502f81cfe843f0d16\",\"lessThan\":\"bfca5fb4e97c46503ddfc582335917b0cc228264\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"include/linux/sunrpc/clnt.h\",\"net/sunrpc/clnt.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.318\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.280\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.202\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.140\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.64\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.5.13\",\"lessThanOrEqual\":\"6.5.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.3\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.7\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-06-17T17:36:49.719946Z\",\"id\":\"CVE-2023-52803\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T10:56:26+00:00",
      "cve": "CVE-2023-52803",
      "id": "CVE-2023-52803",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "429",
      "product_status:known_affected": "150",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: SUNRPC: Fix RPC client cleaned up the freed pipefs dentries",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52803.json",
      "version": "3"
    },
    "vulnrichment": {
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\"https://git.kernel.org/stable/c/bfca5fb4e97c46503ddfc582335917b0cc228264\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T23:11:35.893Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-52803\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-17T17:36:49.719946Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-17T17:36:50.673Z\"}}], \"cna\": {\"title\": \"SUNRPC: Fix RPC client cleaned up the freed pipefs dentries\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"0157d021d23a087eecfa830502f81cfe843f0d16\", \"lessThan\": \"17866066b8ac1cc38fb449670bc15dc9fee4b40a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0157d021d23a087eecfa830502f81cfe843f0d16\", \"lessThan\": \"7d61d1da2ed1f682c41cae0c8d4719cdaccee5c5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0157d021d23a087eecfa830502f81cfe843f0d16\", \"lessThan\": \"dedf2a0eb9448ae73b270743e6ea9b108189df46\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0157d021d23a087eecfa830502f81cfe843f0d16\", \"lessThan\": \"194454afa6aa9d6ed74f0c57127bc8beb27c20df\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0157d021d23a087eecfa830502f81cfe843f0d16\", \"lessThan\": \"7749fd2dbef72a52b5c9ffdbf877691950ed4680\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0157d021d23a087eecfa830502f81cfe843f0d16\", \"lessThan\": \"1cdb52ffd6600a37bd355d8dce58ecd03e55e618\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0157d021d23a087eecfa830502f81cfe843f0d16\", \"lessThan\": \"cc2e7ebbeb1d0601f7f3c8d93b78fcc03a95e44a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0157d021d23a087eecfa830502f81cfe843f0d16\", \"lessThan\": \"bfca5fb4e97c46503ddfc582335917b0cc228264\", \"versionType\": \"git\"}], \"programFiles\": [\"include/linux/sunrpc/clnt.h\", \"net/sunrpc/clnt.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.4\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.4\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.318\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.280\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.202\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.140\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.64\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.5.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"include/linux/sunrpc/clnt.h\", \"net/sunrpc/clnt.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/17866066b8ac1cc38fb449670bc15dc9fee4b40a\"}, {\"url\": \"https://git.kernel.org/stable/c/7d61d1da2ed1f682c41cae0c8d4719cdaccee5c5\"}, {\"url\": \"https://git.kernel.org/stable/c/dedf2a0eb9448ae73b270743e6ea9b108189df46\"}, {\"url\": \"https://git.kernel.org/stable/c/194454afa6aa9d6ed74f0c57127bc8beb27c20df\"}, {\"url\": \"https://git.kernel.org/stable/c/7749fd2dbef72a52b5c9ffdbf877691950ed4680\"}, {\"url\": \"https://git.kernel.org/stable/c/1cdb52ffd6600a37bd355d8dce58ecd03e55e618\"}, {\"url\": \"https://git.kernel.org/stable/c/cc2e7ebbeb1d0601f7f3c8d93b78fcc03a95e44a\"}, {\"url\": \"https://git.kernel.org/stable/c/bfca5fb4e97c46503ddfc582335917b0cc228264\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T08:26:15.211Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52803\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T08:26:15.211Z\", \"dateReserved\": \"2024-05-21T15:19:24.247Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T15:31:15.063Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.