CVE-2023-52701 (GCVE-0-2023-52701)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:22 – Updated: 2026-05-11 19:31
VLAI
Title
net: use a bounce buffer for copying skb->mark
Summary
In the Linux kernel, the following vulnerability has been resolved: net: use a bounce buffer for copying skb->mark syzbot found arm64 builds would crash in sock_recv_mark() when CONFIG_HARDENED_USERCOPY=y x86 and powerpc are not detecting the issue because they define user_access_begin. This will be handled in a different patch, because a check_object_size() is missing. Only data from skb->cb[] can be copied directly to/from user space, as explained in commit 79a8a642bf05 ("net: Whitelist the skbuff_head_cache "cb" field") syzbot report was: usercopy: Kernel memory exposure attempt detected from SLUB object 'skbuff_head_cache' (offset 168, size 4)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:102 ! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4410 Comm: syz-executor533 Not tainted 6.2.0-rc7-syzkaller-17907-g2d3827b3f393 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : usercopy_abort+0x90/0x94 mm/usercopy.c:90 lr : usercopy_abort+0x90/0x94 mm/usercopy.c:90 sp : ffff80000fb9b9a0 x29: ffff80000fb9b9b0 x28: ffff0000c6073400 x27: 0000000020001a00 x26: 0000000000000014 x25: ffff80000cf52000 x24: fffffc0000000000 x23: 05ffc00000000200 x22: fffffc000324bf80 x21: ffff0000c92fe1a8 x20: 0000000000000001 x19: 0000000000000004 x18: 0000000000000000 x17: 656a626f2042554c x16: ffff0000c6073dd0 x15: ffff80000dbd2118 x14: ffff0000c6073400 x13: 00000000ffffffff x12: ffff0000c6073400 x11: ff808000081bbb4c x10: 0000000000000000 x9 : 7b0572d7cc0ccf00 x8 : 7b0572d7cc0ccf00 x7 : ffff80000bf650d4 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefbff08 x1 : 0000000100000000 x0 : 000000000000006c Call trace: usercopy_abort+0x90/0x94 mm/usercopy.c:90 __check_heap_object+0xa8/0x100 mm/slub.c:4761 check_heap_object mm/usercopy.c:196 [inline] __check_object_size+0x208/0x6b8 mm/usercopy.c:251 check_object_size include/linux/thread_info.h:199 [inline] __copy_to_user include/linux/uaccess.h:115 [inline] put_cmsg+0x408/0x464 net/core/scm.c:238 sock_recv_mark net/socket.c:975 [inline] __sock_recv_cmsgs+0x1fc/0x248 net/socket.c:984 sock_recv_cmsgs include/net/sock.h:2728 [inline] packet_recvmsg+0x2d8/0x678 net/packet/af_packet.c:3482 ____sys_recvmsg+0x110/0x3a0 ___sys_recvmsg net/socket.c:2737 [inline] __sys_recvmsg+0x194/0x210 net/socket.c:2767 __do_sys_recvmsg net/socket.c:2777 [inline] __se_sys_recvmsg net/socket.c:2774 [inline] __arm64_sys_recvmsg+0x2c/0x3c net/socket.c:2774 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x64/0x178 arch/arm64/kernel/syscall.c:52 el0_svc_common+0xbc/0x180 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x110 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x14c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Code: 91388800 aa0903e1 f90003e8 94e6d752 (d4210000)
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: 6fd1d51cfa253b5ee7dae18d7cf1df830e9b6137 , < 863a7de987f02a901bf215509276a7de0370e0f9 (git)
Affected: 6fd1d51cfa253b5ee7dae18d7cf1df830e9b6137 , < 2558b8039d059342197610498c8749ad294adee5 (git)
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Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.13 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52701\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T16:15:12.547\",\"lastModified\":\"2026-06-17T06:43:22.823\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: use a bounce buffer for copying skb-\u003emark\\n\\nsyzbot found arm64 builds would crash in sock_recv_mark()\\nwhen CONFIG_HARDENED_USERCOPY=y\\n\\nx86 and powerpc are not detecting the issue because\\nthey define user_access_begin.\\nThis will be handled in a different patch,\\nbecause a check_object_size() is missing.\\n\\nOnly data from skb-\u003ecb[] can be copied directly to/from user space,\\nas explained in commit 79a8a642bf05 (\\\"net: Whitelist\\nthe skbuff_head_cache \\\"cb\\\" field\\\")\\n\\nsyzbot report was:\\nusercopy: Kernel memory exposure attempt detected from SLUB object \u0027skbuff_head_cache\u0027 (offset 168, size 4)!\\n------------[ cut here ]------------\\nkernel BUG at mm/usercopy.c:102 !\\nInternal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP\\nModules linked in:\\nCPU: 0 PID: 4410 Comm: syz-executor533 Not tainted 6.2.0-rc7-syzkaller-17907-g2d3827b3f393 #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023\\npstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\\npc : usercopy_abort+0x90/0x94 mm/usercopy.c:90\\nlr : usercopy_abort+0x90/0x94 mm/usercopy.c:90\\nsp : ffff80000fb9b9a0\\nx29: ffff80000fb9b9b0 x28: ffff0000c6073400 x27: 0000000020001a00\\nx26: 0000000000000014 x25: ffff80000cf52000 x24: fffffc0000000000\\nx23: 05ffc00000000200 x22: fffffc000324bf80 x21: ffff0000c92fe1a8\\nx20: 0000000000000001 x19: 0000000000000004 x18: 0000000000000000\\nx17: 656a626f2042554c x16: ffff0000c6073dd0 x15: ffff80000dbd2118\\nx14: ffff0000c6073400 x13: 00000000ffffffff x12: ffff0000c6073400\\nx11: ff808000081bbb4c x10: 0000000000000000 x9 : 7b0572d7cc0ccf00\\nx8 : 7b0572d7cc0ccf00 x7 : ffff80000bf650d4 x6 : 0000000000000000\\nx5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000\\nx2 : ffff0001fefbff08 x1 : 0000000100000000 x0 : 000000000000006c\\nCall trace:\\nusercopy_abort+0x90/0x94 mm/usercopy.c:90\\n__check_heap_object+0xa8/0x100 mm/slub.c:4761\\ncheck_heap_object mm/usercopy.c:196 [inline]\\n__check_object_size+0x208/0x6b8 mm/usercopy.c:251\\ncheck_object_size include/linux/thread_info.h:199 [inline]\\n__copy_to_user include/linux/uaccess.h:115 [inline]\\nput_cmsg+0x408/0x464 net/core/scm.c:238\\nsock_recv_mark net/socket.c:975 [inline]\\n__sock_recv_cmsgs+0x1fc/0x248 net/socket.c:984\\nsock_recv_cmsgs include/net/sock.h:2728 [inline]\\npacket_recvmsg+0x2d8/0x678 net/packet/af_packet.c:3482\\n____sys_recvmsg+0x110/0x3a0\\n___sys_recvmsg net/socket.c:2737 [inline]\\n__sys_recvmsg+0x194/0x210 net/socket.c:2767\\n__do_sys_recvmsg net/socket.c:2777 [inline]\\n__se_sys_recvmsg net/socket.c:2774 [inline]\\n__arm64_sys_recvmsg+0x2c/0x3c net/socket.c:2774\\n__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]\\ninvoke_syscall+0x64/0x178 arch/arm64/kernel/syscall.c:52\\nel0_svc_common+0xbc/0x180 arch/arm64/kernel/syscall.c:142\\ndo_el0_svc+0x48/0x110 arch/arm64/kernel/syscall.c:193\\nel0_svc+0x58/0x14c arch/arm64/kernel/entry-common.c:637\\nel0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655\\nel0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591\\nCode: 91388800 aa0903e1 f90003e8 94e6d752 (d4210000)\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net: use un b\u00fafer de rebote para copiar skb-\u0026gt;mark syzbot encontr\u00f3 que las compilaciones arm64 fallar\u00edan en sock_recv_mark() cuando CONFIG_HARDENED_USERCOPY=y x86 y powerpc no detectan el problema porque definen user_access_begin . Esto se manejar\u00e1 en un parche diferente, porque falta check_object_size(). Solo los datos de skb-\u0026gt;cb[] se pueden copiar directamente hacia/desde el espacio de usuario, como se explica en la confirmaci\u00f3n 79a8a642bf05 (\\\"net: Lista blanca del campo skbuff_head_cache \\\"cb\\\") El informe de syzbot fue: copia de usuario: intento de exposici\u00f3n de la memoria del kernel detectado desde SLUB objeto \u0027skbuff_head_cache\u0027 (desplazamiento 168, tama\u00f1o 4)! ------------[ cortar aqu\u00ed ]------------ \u00a1ERROR del kernel en mm/usercopy.c:102! Error interno: Ups - ERROR: 00000000f2000800 [#1] PREEMPT M\u00f3dulos SMP vinculados en: CPU: 0 PID: 4410 Comm: syz-executor533 No contaminado 6.2.0-rc7-syzkaller-17907-g2d3827b3f393 #0 Nombre de hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 21/01/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc: usercopy_abort+0x90/0x94 mm/usercopy.c:90 lr: usercopy_abort+0x90/0x94 mm/usercopy.c:90 sp: ffff80000fb9b9a0 x29: ffff80000fb9b9b0 x28: ffff0000c6073400 x27: 0000000020001a00 x26: 0000000000000014 5: ffff80000cf52000 x24: ffffc0000000000 x23: 05ffc00000000200 x22: ffffc000324bf80 x21: ffff0000c92fe1a8 x20: 0000000000000001 x19: 00000004 x18: 0000000000000000 x17: 656a626f2042554c x16: ffff0000c6073dd0 x15: ffff80000dbd2118 x14: ffff0000c6073400 x13: 00000000ffffffff x12: 073400 x11: ff808000081bbb4c x10: 0000000000000000 x9: 7b0572d7cc0ccf00 x8: 7b0572d7cc0ccf00 x7: ffff80000bf650d4 x6: 0000000000000000 x5: 0000000000000001 x4: 0000000000000001 x3: 0000000000000000 x2: ffff0001fefbff08 x1 : 0000000100000000 x0 : 000000000000006c Rastreo de llamadas: usercopy_abort+0x90/0x94 mm/usercopy.c:90 __check_heap_object+0xa8/0x100 mm/slub.c:4761 check_heap_object mm/usercopy.c:196 __check_object _tama\u00f1o+0x208/0x6b8 mm/ usercopy.c:251 check_object_size include/linux/thread_info.h:199 [en l\u00ednea] __copy_to_user include/linux/uaccess.h:115 [en l\u00ednea] put_cmsg+0x408/0x464 net/core/scm.c:238 sock_recv_mark net/socket. c:975 [en l\u00ednea] __sock_recv_cmsgs+0x1fc/0x248 net/socket.c:984 sock_recv_cmsgs include/net/sock.h:2728 [en l\u00ednea] paquete_recvmsg+0x2d8/0x678 net/packet/af_packet.c:3482 ____sys_recvmsg+0x1 10/0x3a0 ___sys_recvmsg net/socket.c:2737 [en l\u00ednea] __sys_recvmsg+0x194/0x210 net/socket.c:2767 __do_sys_recvmsg net/socket.c:2777 [en l\u00ednea] __se_sys_recvmsg net/socket.c:2774 [en l\u00ednea] 64_sys_recvmsg+0x2c/0x3c net/socket.c:2774 __invoke_syscall arch/arm64/kernel/syscall.c:38 [en l\u00ednea] invoke_syscall+0x64/0x178 arch/arm64/kernel/syscall.c:52 el0_svc_common+0xbc/0x180 arch/arm64/kernel/syscall .c:142 do_el0_svc+0x48/0x110 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x14c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry -common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 C\u00f3digo: 91388800 aa0903e1 f90003e8 94e6d752 (d4210000)\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/socket.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6fd1d51cfa253b5ee7dae18d7cf1df830e9b6137\",\"lessThan\":\"863a7de987f02a901bf215509276a7de0370e0f9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6fd1d51cfa253b5ee7dae18d7cf1df830e9b6137\",\"lessThan\":\"2558b8039d059342197610498c8749ad294adee5\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/socket.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.19\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.19\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.13\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2\",\"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:H/I:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-05-21T17:32:19.425671Z\",\"id\":\"CVE-2023-52701\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.19\",\"versionEndExcluding\":\"6.1.13\",\"matchCriteriaId\":\"D75E5BD8-C55B-43BA-8730-33C8DCB1DF91\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"FF501633-2F44-4913-A8EE-B021929F49F6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"2BDA597B-CAC1-4DF0-86F0-42E142C654E9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"725C78C9-12CE-406F-ABE8-0813A01D66E8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"A127C155-689C-4F67-B146-44A57F4BFD85\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"D34127CC-68F5-4703-A5F6-5006F803E4AE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"4AB8D555-648E-4F2F-98BD-3E7F45BD12A8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"C64BDD9D-C663-4E75-AE06-356EDC392B82\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc8:*:*:*:*:*:*\",\"matchCriteriaId\":\"26544390-88E4-41CA-98BF-7BB1E9D4E243\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2558b8039d059342197610498c8749ad294adee5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/863a7de987f02a901bf215509276a7de0370e0f9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2558b8039d059342197610498c8749ad294adee5\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/863a7de987f02a901bf215509276a7de0370e0f9\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2025-11-21T10:50:54+00:00",
      "cve": "CVE-2023-52701",
      "id": "CVE-2023-52701",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "42",
      "product_status:known_not_affected": "156",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: use a bounce buffer for copying skb-\u0026gt;mark",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52701.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/863a7de987f02a901bf215509276a7de0370e0f9\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/2558b8039d059342197610498c8749ad294adee5\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T23:11:35.233Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-52701\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-21T17:32:19.425671Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T19:01:25.288Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"net: use a bounce buffer for copying skb-\u003emark\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6fd1d51cfa253b5ee7dae18d7cf1df830e9b6137\", \"lessThan\": \"863a7de987f02a901bf215509276a7de0370e0f9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6fd1d51cfa253b5ee7dae18d7cf1df830e9b6137\", \"lessThan\": \"2558b8039d059342197610498c8749ad294adee5\", \"versionType\": \"git\"}], \"programFiles\": [\"net/socket.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.19\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.19\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.2\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/socket.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/863a7de987f02a901bf215509276a7de0370e0f9\"}, {\"url\": \"https://git.kernel.org/stable/c/2558b8039d059342197610498c8749ad294adee5\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: use a bounce buffer for copying skb-\u003emark\\n\\nsyzbot found arm64 builds would crash in sock_recv_mark()\\nwhen CONFIG_HARDENED_USERCOPY=y\\n\\nx86 and powerpc are not detecting the issue because\\nthey define user_access_begin.\\nThis will be handled in a different patch,\\nbecause a check_object_size() is missing.\\n\\nOnly data from skb-\u003ecb[] can be copied directly to/from user space,\\nas explained in commit 79a8a642bf05 (\\\"net: Whitelist\\nthe skbuff_head_cache \\\"cb\\\" field\\\")\\n\\nsyzbot report was:\\nusercopy: Kernel memory exposure attempt detected from SLUB object \u0027skbuff_head_cache\u0027 (offset 168, size 4)!\\n------------[ cut here ]------------\\nkernel BUG at mm/usercopy.c:102 !\\nInternal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP\\nModules linked in:\\nCPU: 0 PID: 4410 Comm: syz-executor533 Not tainted 6.2.0-rc7-syzkaller-17907-g2d3827b3f393 #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023\\npstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\\npc : usercopy_abort+0x90/0x94 mm/usercopy.c:90\\nlr : usercopy_abort+0x90/0x94 mm/usercopy.c:90\\nsp : ffff80000fb9b9a0\\nx29: ffff80000fb9b9b0 x28: ffff0000c6073400 x27: 0000000020001a00\\nx26: 0000000000000014 x25: ffff80000cf52000 x24: fffffc0000000000\\nx23: 05ffc00000000200 x22: fffffc000324bf80 x21: ffff0000c92fe1a8\\nx20: 0000000000000001 x19: 0000000000000004 x18: 0000000000000000\\nx17: 656a626f2042554c x16: ffff0000c6073dd0 x15: ffff80000dbd2118\\nx14: ffff0000c6073400 x13: 00000000ffffffff x12: ffff0000c6073400\\nx11: ff808000081bbb4c x10: 0000000000000000 x9 : 7b0572d7cc0ccf00\\nx8 : 7b0572d7cc0ccf00 x7 : ffff80000bf650d4 x6 : 0000000000000000\\nx5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000\\nx2 : ffff0001fefbff08 x1 : 0000000100000000 x0 : 000000000000006c\\nCall trace:\\nusercopy_abort+0x90/0x94 mm/usercopy.c:90\\n__check_heap_object+0xa8/0x100 mm/slub.c:4761\\ncheck_heap_object mm/usercopy.c:196 [inline]\\n__check_object_size+0x208/0x6b8 mm/usercopy.c:251\\ncheck_object_size include/linux/thread_info.h:199 [inline]\\n__copy_to_user include/linux/uaccess.h:115 [inline]\\nput_cmsg+0x408/0x464 net/core/scm.c:238\\nsock_recv_mark net/socket.c:975 [inline]\\n__sock_recv_cmsgs+0x1fc/0x248 net/socket.c:984\\nsock_recv_cmsgs include/net/sock.h:2728 [inline]\\npacket_recvmsg+0x2d8/0x678 net/packet/af_packet.c:3482\\n____sys_recvmsg+0x110/0x3a0\\n___sys_recvmsg net/socket.c:2737 [inline]\\n__sys_recvmsg+0x194/0x210 net/socket.c:2767\\n__do_sys_recvmsg net/socket.c:2777 [inline]\\n__se_sys_recvmsg net/socket.c:2774 [inline]\\n__arm64_sys_recvmsg+0x2c/0x3c net/socket.c:2774\\n__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]\\ninvoke_syscall+0x64/0x178 arch/arm64/kernel/syscall.c:52\\nel0_svc_common+0xbc/0x180 arch/arm64/kernel/syscall.c:142\\ndo_el0_svc+0x48/0x110 arch/arm64/kernel/syscall.c:193\\nel0_svc+0x58/0x14c arch/arm64/kernel/entry-common.c:637\\nel0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655\\nel0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591\\nCode: 91388800 aa0903e1 f90003e8 94e6d752 (d4210000)\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.13\", \"versionStartIncluding\": \"5.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.2\", \"versionStartIncluding\": \"5.19\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:31:58.844Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52701\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:31:58.844Z\", \"dateReserved\": \"2024-03-07T14:49:46.891Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T15:22:51.354Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

Author Source Type Date Other

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.