CVE-2023-53863

UNRATEDCVSS · not yet scored

Also known asEUVD-2023-60133 (ENISA EUVD) · GHSA-44vj-whpr-3frv (GitHub Security Advisories)Source: ENISA EUVD

—
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

netlink: do not hard code device address lenth in fdb dumps

syzbot reports that some netdev devices do not have a six bytes address [1]

Replace ETH_ALEN by dev->addr_len.

[1] (Case of a device where dev->addr_len = 4)

BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in copyout+0xb8/0x100 lib/iov_iter.c:169 instrument_copy_to_user include/linux/instrumented.h:114 [inline] copyout+0xb8/0x100 lib/iov_iter.c:169 _copy_to_iter+0x6d8/0x1d00 lib/iov_iter.c:536 copy_to_iter include/linux/uio.h:206 [inline] simple_copy_to_iter+0x68/0xa0 net/core/datagram.c:513 __skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:419 skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:527 skb_copy_datagram_msg include/linux/skbuff.h:3960 [inline] netlink_recvmsg+0x4ae/0x15a0 net/netlink/af_netlink.c:1970 sock_recvmsg_nosec net/socket.c:1019 [inline] sock_recvmsg net/socket.c:1040 [inline] ____sys_recvmsg+0x283/0x7f0 net/socket.c:2722 ___sys_recvmsg+0x223/0x840 net/socket.c:2764 do_recvmmsg+0x4f9/0xfd0 net/socket.c:2858 __sys_recvmmsg net/socket.c:2937 [inline] __do_sys_recvmmsg net/socket.c:2960 [inline] __se_sys_recvmmsg net/socket.c:2953 [inline] __x64_sys_recvmmsg+0x397/0x490 net/socket.c:2953 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 stored to memory at: __nla_put lib/nlattr.c:1009 [inline] nla_put+0x1c6/0x230 lib/nlattr.c:1067 nlmsg_populate_fdb_fill+0x2b8/0x600 net/core/rtnetlink.c:4071 nlmsg_populate_fdb net/core/rtnetlink.c:4418 [inline] ndo_dflt_fdb_dump+0x616/0x840 net/core/rtnetlink.c:4456 rtnl_fdb_dump+0x14ff/0x1fc0 net/core/rtnetlink.c:4629 netlink_dump+0x9d1/0x1310 net/netlink/af_netlink.c:2268 netlink_recvmsg+0xc5c/0x15a0 net/netlink/af_netlink.c:1995 sock_recvmsg_nosec+0x7a/0x120 net/socket.c:1019 ____sys_recvmsg+0x664/0x7f0 net/socket.c:2720 ___sys_recvmsg+0x223/0x840 net/socket.c:2764 do_recvmmsg+0x4f9/0xfd0 net/socket.c:2858 __sys_recvmmsg net/socket.c:2937 [inline] __do_sys_recvmmsg net/socket.c:2960 [inline] __se_sys_recvmmsg net/socket.c:2953 [inline] __x64_sys_recvmmsg+0x397/0x490 net/socket.c:2953 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+0x12d/0xb60 mm/slab.h:716 slab_alloc_node mm/slub.c:3451 [inline] __kmem_cache_alloc_node+0x4ff/0x8b0 mm/slub.c:3490 kmalloc_trace+0x51/0x200 mm/slab_common.c:1057 kmalloc include/linux/slab.h:559 [inline] __hw_addr_create net/core/dev_addr_lists.c:60 [inline] __hw_addr_add_ex+0x2e5/0x9e0 net/core/dev_addr_lists.c:118 __dev_mc_add net/core/dev_addr_lists.c:867 [inline] dev_mc_add+0x9a/0x130 net/core/dev_addr_lists.c:885 igmp6_group_added+0x267/0xbc0 net/ipv6/mcast.c:680 ipv6_mc_up+0x296/0x3b0 net/ipv6/mcast.c:2754 ipv6_mc_remap+0x1e/0x30 net/ipv6/mcast.c:2708 addrconf_type_change net/ipv6/addrconf.c:3731 [inline] addrconf_notify+0x4d3/0x1d90 net/ipv6/addrconf.c:3699 notifier_call_chain kernel/notifier.c:93 [inline] raw_notifier_call_chain+0xe4/0x430 kernel/notifier.c:461 call_netdevice_notifiers_info net/core/dev.c:1935 [inline] call_netdevice_notifiers_extack net/core/dev.c:1973 [inline] call_netdevice_notifiers+0x1ee/0x2d0 net/core/dev.c:1987 bond_enslave+0xccd/0x53f0 drivers/net/bonding/bond_main.c:1906 do_set_master net/core/rtnetlink.c:2626 [inline] rtnl_newlink_create net/core/rtnetlink.c:3460 [inline] __rtnl_newlink net/core/rtnetlink.c:3660 [inline] rtnl_newlink+0x378c/0x40e0 net/core/rtnetlink.c:3673 rtnetlink_rcv_msg+0x16a6/0x1840 net/core/rtnetlink.c:6395 netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2546 rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6413 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0xf28/0x1230 net/netlink/af_ ---truncated---

CVSS v3
—
EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.3%
EPSS %ILE
18th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

EG Severity
Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-26). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
No SSVC decision: EchelonGraph has not assessed this CVECISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the BOD 26-04 block below.

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

December 9, 2025

Last Modified

April 15, 2026

References (9)

Vendor Advisories for CVE-2023-53863(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:5.14.0-427.13.1.el9_42024-04-30redhat
linuxKernel @ 4.14.322 (fixes >=3.5.0)—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (33 versions)
  • every version up to 5.10.191-1: fixed in 5.10.191-1
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Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.27-1 ... 6.1.38-4~bpo11+1 (8 versions)
  • every version up to 6.1.52-1: fixed in 6.1.52-1
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Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.4.4-1: fixed in 6.4.4-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.4.4-1: fixed in 6.4.4-1
—

Data Freshness Timeline

(refreshed 7× in last 7d / 38× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 94 of 226 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 6 repeat rows among the latest 100 are merged into the row they repeat. The 132 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-03 16:41 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  2. 2026-11-02 16:40 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  3. 2026-11-01 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  4. 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  5. 2026-10-30 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  6. 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  7. 2026-10-28 16:29 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  8. 2026-10-27 16:29 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  9. 2026-10-27 10:42 UTCEG score recompute
  10. 2026-10-27 10:42 UTCVendor advisory
  11. 2026-10-27 10:42 UTCGHSA enrichmentGHSA-44vj-whpr-3frv
  12. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  13. 2026-10-25 17:27 UTCEG score recompute
  14. 2026-10-25 16:30 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  15. 2026-10-24 22:55 UTCOSV refresh
  16. 2026-10-24 16:29 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  17. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  18. 2026-10-22 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  19. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  20. 2026-10-20 16:30 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  21. 2026-10-19 16:29 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  22. 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  23. 2026-10-18 07:40 UTCEG score recompute
  24. 2026-10-17 16:30 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  25. 2026-10-16 16:36 UTCEPSS rescoreEPSS 0.3% · 17th percentile
Show 69 more
  1. 2026-10-15 16:29 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  2. 2026-10-14 16:30 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  3. 2026-10-13 16:30 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  4. 2026-10-12 18:12 UTCEG score recompute
  5. 2026-10-12 16:31 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  6. 2026-10-11 21:37 UTCEG score recompute
  7. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  8. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  9. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  10. 2026-10-08 17:06 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  11. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  12. 2026-10-06 15:15 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  13. 2026-10-05 17:41 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  14. 2026-10-04 23:20 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  15. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  16. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  17. 2026-10-01 04:40 UTCOSV refresh
  18. 2026-09-30 16:38 UTCEG score recompute
  19. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  20. 2026-09-29 15:17 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  21. 2026-09-28 13:49 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  22. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  23. 2026-09-24 14:01 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  24. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  25. 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  26. 2026-09-18 19:26 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  27. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  28. 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  29. 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  30. 2026-09-13 16:45 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  31. 2026-09-12 14:58 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  32. 2026-09-12 06:53 UTCOSV refresh
  33. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  34. 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  35. 2026-09-08 21:58 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  36. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  37. 2026-09-05 15:26 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  38. 2026-09-04 13:58 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  39. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  40. 2026-09-02 14:10 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  41. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  42. 2026-09-01 04:36 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  43. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  44. 2026-08-30 01:20 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  45. 2026-08-28 21:39 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  46. 2026-08-27 14:23 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  47. 2026-08-26 14:44 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  48. 2026-08-25 13:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  49. 2026-08-24 12:00 UTCOSV refresh
  50. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  51. 2026-08-21 23:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  52. 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  53. 2026-08-19 17:02 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  54. 2026-08-18 13:46 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  55. 2026-08-16 14:54 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  56. 2026-08-16 02:12 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  57. 2026-08-15 01:28 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  58. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  59. 2026-08-12 13:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  60. 2026-08-11 13:40 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  61. 2026-08-10 23:58 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  62. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  63. 2026-08-08 16:35 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  64. 2026-08-08 08:00 UTCEG score recompute
  65. 2026-08-08 08:00 UTCVendor advisory
  66. 2026-08-08 08:00 UTCGHSA enrichmentGHSA-44vj-whpr-3frv
  67. 2026-08-07 16:25 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  68. 2026-08-06 13:45 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  69. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile

Related CVEs(same vendor)

Frequently asked(4)

What is CVE-2023-53863?
CVE-2023-53863 is a vulnerability whose severity is not yet rated; its CVE record was published on December 9, 2025. In the Linux kernel, the following vulnerability has been resolved: netlink: do not hard code device address lenth in fdb dumps syzbot reports that some netdev devices do not have a six bytes address [1] Replace ETH_ALEN by dev->addr_len. [1] (Case of a device where dev->addr_len = 4) BUG: KMSAN:…
When was the CVE record for CVE-2023-53863 published?
The CVE record for CVE-2023-53863 was published on December 9, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of April 15, 2026; the record at its source may have been updated since.
Is CVE-2023-53863 actively exploited?
CVE-2023-53863 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
How do I remediate CVE-2023-53863?
A fix for CVE-2023-53863 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2023-53863 are linked in the Vendor Advisories panel on this page.

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