CVE-2023-53192 — Improper Validation of Array Index in Linux

CWE-129 — Improper Validation of Array IndexCWE-190 — Integer Overflow or Wraparound5 documents5 sources
Severity
7.8HIGHNVD
EPSS
0.0%
top 95.67%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedSep 15

Description

In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix nexthop hash size The nexthop code expects a 31 bit hash, such as what is returned by fib_multipath_hash() and rt6_multipath_hash(). Passing the 32 bit hash returned by skb_get_hash() can lead to problems related to the fact that 'int hash' is a negative number when the MSB is set. In the case of hash threshold nexthop groups, nexthop_select_path_hthr() will disproportionately select the first nexthop group entry. …

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages4 packages

▶debiandebian/linux< linux 6.1.52-1 (bookworm)
▶NVDlinux/linux_kernel5.8 — 5.10.190+4
▶Debianlinux/linux_kernel< 5.10.191-1+3
▶CVEListV5linux/linux1274e1cc42264d4e629841e4f182795cb0becfd2 — c650597647ecb318d02372277bdfd866c6829f78+5

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

2
OSV
CVE-2023-53192: In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix nexthop hash size The nexthop code expects a 31 bit hash, such as what↗2025-09-15
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GHSA
GHSA-5ghm-j624-hfm6: In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix nexthop hash size The nexthop code expects a 31 bit hash, such as wha↗2025-09-15
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📋Vendor Advisories

2
Red Hat
kernel: Linux kernel: Out-of-bounds write in VXLAN due to incorrect nexthop hash size leading to denial of service↗2025-09-15
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Debian
CVE-2023-53192: linux - In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix ...↗2023
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CVE-2023-53192 — Improper Validation of Array Index | cvebase