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EUVD-2026-345078

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:59

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:59:38.534478+00:00",
  "id": "EUVD-2026-345078"
}

CVE-2023-52845 (GCVE-0-2023-52845)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:31 – Updated: 2026-08-05 09:11

Title

tipc: Change nla_policy for bearer-related names to NLA_NUL_STRING

Summary

In the Linux kernel, the following vulnerability has been resolved: tipc: Change nla_policy for bearer-related names to NLA_NUL_STRING syzbot reported the following uninit-value access issue [1]: ===================================================== BUG: KMSAN: uninit-value in strlen lib/string.c:418 [inline] BUG: KMSAN: uninit-value in strstr+0xb8/0x2f0 lib/string.c:756 strlen lib/string.c:418 [inline] strstr+0xb8/0x2f0 lib/string.c:756 tipc_nl_node_reset_link_stats+0x3ea/0xb50 net/tipc/node.c:2595 genl_family_rcv_msg_doit net/netlink/genetlink.c:971 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline] genl_rcv_msg+0x11ec/0x1290 net/netlink/genetlink.c:1066 netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2545 genl_rcv+0x40/0x60 net/netlink/genetlink.c:1075 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0xf47/0x1250 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg net/socket.c:753 [inline] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595 __sys_sendmsg net/socket.c:2624 [inline] __do_sys_sendmsg net/socket.c:2633 [inline] __se_sys_sendmsg net/socket.c:2631 [inline] __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Uninit was created at: slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:559 __alloc_skb+0x318/0x740 net/core/skbuff.c:650 alloc_skb include/linux/skbuff.h:1286 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1214 [inline] netlink_sendmsg+0xb34/0x13d0 net/netlink/af_netlink.c:1885 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg net/socket.c:753 [inline] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595 __sys_sendmsg net/socket.c:2624 [inline] __do_sys_sendmsg net/socket.c:2633 [inline] __se_sys_sendmsg net/socket.c:2631 [inline] __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd TIPC bearer-related names including link names must be null-terminated strings. If a link name which is not null-terminated is passed through netlink, strstr() and similar functions can cause buffer overrun. This causes the above issue. This patch changes the nla_policy for bearer-related names from NLA_STRING to NLA_NUL_STRING. This resolves the issue by ensuring that only null-terminated strings are accepted as bearer-related names. syzbot reported similar uninit-value issue related to bearer names [2]. The root cause of this issue is that a non-null-terminated bearer name was passed. This patch also resolved this issue.

Severity

7.1 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 15:36 UTC

Assigner

Linux mitre root Scorecard

References

9 references

URL	Tags
https://git.kernel.org/stable/c/6744008c354bca2e4…
https://git.kernel.org/stable/c/2426425d686b43adb…
https://git.kernel.org/stable/c/2199260c42e6fbc5a…
https://git.kernel.org/stable/c/b33d130f07f1decd7…
https://git.kernel.org/stable/c/3907b89cd17fcc23e…
https://git.kernel.org/stable/c/4c731e98fe4d678e8…
https://git.kernel.org/stable/c/abc1582119e8c4af1…
https://git.kernel.org/stable/c/560992f41c0cea44b…
https://git.kernel.org/stable/c/19b3f72a41a8751e2…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0655f6a8635b1b66f2434d5556b1044c14b1ccaf , < 6744008c354bca2e4686a5b6056ee6b535d9f67d (git) Affected: 0655f6a8635b1b66f2434d5556b1044c14b1ccaf , < 2426425d686b43adbc4f2f4a367b494f06f159d6 (git) Affected: 0655f6a8635b1b66f2434d5556b1044c14b1ccaf , < 2199260c42e6fbc5af8adae3bf78e623407c91b0 (git) Affected: 0655f6a8635b1b66f2434d5556b1044c14b1ccaf , < b33d130f07f1decd756b849ab03c23d11d4dd294 (git) Affected: 0655f6a8635b1b66f2434d5556b1044c14b1ccaf , < 3907b89cd17fcc23e9a80789c36856f00ece0ba8 (git) Affected: 0655f6a8635b1b66f2434d5556b1044c14b1ccaf , < 4c731e98fe4d678e87ba3e4d45d3cf0a5a193dc4 (git) Affected: 0655f6a8635b1b66f2434d5556b1044c14b1ccaf , < abc1582119e8c4af14cedb0db6541fd603f45a04 (git) Affected: 0655f6a8635b1b66f2434d5556b1044c14b1ccaf , < 560992f41c0cea44b7603bc9e6c73bffbf6b5709 (git) Affected: 0655f6a8635b1b66f2434d5556b1044c14b1ccaf , < 19b3f72a41a8751e26bffc093bb7e1cef29ad579 (git)
Linux	Linux	Affected: 3.19 Unaffected: 0 , < 3.19 (semver) Unaffected: 4.14.330 , ≤ 4.14.* (semver) Unaffected: 4.19.299 , ≤ 4.19.* (semver) Unaffected: 5.4.261 , ≤ 5.4.* (semver) Unaffected: 5.10.201 , ≤ 5.10.* (semver) Unaffected: 5.15.139 , ≤ 5.15.* (semver) Unaffected: 6.1.63 , ≤ 6.1.* (semver) Unaffected: 6.5.12 , ≤ 6.5.* (semver) Unaffected: 6.6.2 , ≤ 6.6.* (semver) Unaffected: 6.7 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: Change nla_policy for bearer-related names to NLA_NUL_STRING\n\nsyzbot reported the following uninit-value access issue [1]:\n\n=====================================================\nBUG: KMSAN: uninit-value in strlen lib/string.c:418 [inline]\nBUG: KMSAN: uninit-value in strstr+0xb8/0x2f0 lib/string.c:756\n strlen lib/string.c:418 [inline]\n strstr+0xb8/0x2f0 lib/string.c:756\n tipc_nl_node_reset_link_stats+0x3ea/0xb50 net/tipc/node.c:2595\n genl_family_rcv_msg_doit net/netlink/genetlink.c:971 [inline]\n genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline]\n genl_rcv_msg+0x11ec/0x1290 net/netlink/genetlink.c:1066\n netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2545\n genl_rcv+0x40/0x60 net/netlink/genetlink.c:1075\n netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]\n netlink_unicast+0xf47/0x1250 net/netlink/af_netlink.c:1368\n netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910\n sock_sendmsg_nosec net/socket.c:730 [inline]\n sock_sendmsg net/socket.c:753 [inline]\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595\n __sys_sendmsg net/socket.c:2624 [inline]\n __do_sys_sendmsg net/socket.c:2633 [inline]\n __se_sys_sendmsg net/socket.c:2631 [inline]\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nUninit was created at:\n slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767\n slab_alloc_node mm/slub.c:3478 [inline]\n kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523\n kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:559\n __alloc_skb+0x318/0x740 net/core/skbuff.c:650\n alloc_skb include/linux/skbuff.h:1286 [inline]\n netlink_alloc_large_skb net/netlink/af_netlink.c:1214 [inline]\n netlink_sendmsg+0xb34/0x13d0 net/netlink/af_netlink.c:1885\n sock_sendmsg_nosec net/socket.c:730 [inline]\n sock_sendmsg net/socket.c:753 [inline]\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595\n __sys_sendmsg net/socket.c:2624 [inline]\n __do_sys_sendmsg net/socket.c:2633 [inline]\n __se_sys_sendmsg net/socket.c:2631 [inline]\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nTIPC bearer-related names including link names must be null-terminated\nstrings. If a link name which is not null-terminated is passed through\nnetlink, strstr() and similar functions can cause buffer overrun. This\ncauses the above issue.\n\nThis patch changes the nla_policy for bearer-related names from NLA_STRING\nto NLA_NUL_STRING. This resolves the issue by ensuring that only\nnull-terminated strings are accepted as bearer-related names.\n\nsyzbot reported similar uninit-value issue related to bearer names [2]. The\nroot cause of this issue is that a non-null-terminated bearer name was\npassed. This patch also resolved this issue."
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              "value": "AV:L - The vulnerable code is reached only via local genetlink netlink (sendmsg \u2192 tipc_nl_node_reset_link_stats / bearer ops). Remote TIPC packet processing does not parse these netlink name attributes.\nAC:L - An attacker can deterministically trigger the bug by sending a crafted genetlink message with a non-NUL-terminated TIPC_NLA_LINK_NAME or TIPC_NLA_BEARER_NAME; no race or attacker-uncontrollable condition is required.\nPR:L - tipc_genl_v2_ops carry no GENL_ADMIN_PERM (unlike the legacy compat path\u2019s CAP_NET_ADMIN check), so any unprivileged local user can invoke the vulnerable commands when tipc is loaded.\nUI:N - Exploitation requires only attacker-sent netlink messages; no separate victim action is needed.\nS:U - Impact remains within the host kernel tipc/netlink authority and does not cross a VM, IOMMU, or other security boundary.\nC:H - NLA_STRING allows non-NUL-terminated names up to TIPC_MAX_LINK_NAME/BEARER_NAME, after which strstr/strcmp/strlen perform an unbounded out-of-bounds kernel read past the attribute into adjacent skb/slab memory; per kernel CNA guidance such OOB reads are High unless strictly bounded.\nI:N - The defect is a read-only over-read; bearer enable copies go through strscpy-bounded bearer_name_validate before strcpy into b-\u003ename, so there is no OOB write or control-flow hijack primitive from this bug.\nA:H - Unbounded string walks past the netlink attribute/skb object can touch unmapped memory and oops/panic the kernel, which is High availability impact."
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        },
        {
          "url": "https://git.kernel.org/stable/c/2199260c42e6fbc5af8adae3bf78e623407c91b0"
        },
        {
          "url": "https://git.kernel.org/stable/c/b33d130f07f1decd756b849ab03c23d11d4dd294"
        },
        {
          "url": "https://git.kernel.org/stable/c/3907b89cd17fcc23e9a80789c36856f00ece0ba8"
        },
        {
          "url": "https://git.kernel.org/stable/c/4c731e98fe4d678e87ba3e4d45d3cf0a5a193dc4"
        },
        {
          "url": "https://git.kernel.org/stable/c/abc1582119e8c4af14cedb0db6541fd603f45a04"
        },
        {
          "url": "https://git.kernel.org/stable/c/560992f41c0cea44b7603bc9e6c73bffbf6b5709"
        },
        {
          "url": "https://git.kernel.org/stable/c/19b3f72a41a8751e26bffc093bb7e1cef29ad579"
        }
      ],
      "title": "tipc: Change nla_policy for bearer-related names to NLA_NUL_STRING",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-52845",
    "datePublished": "2024-05-21T15:31:43.181Z",
    "dateReserved": "2024-05-21T15:19:24.254Z",
    "dateUpdated": "2026-08-05T09:11:38.672Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

EUVD-2026-345078

CVE-2023-52845 (GCVE-0-2023-52845)

Tags

Sightings

Nomenclature

Related by attack behaviour