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CVE-2023-53516Patch(linux / linux_kernel)

LOWCVSS 7.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch linux linux_kernel systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

In the Linux kernel, the following vulnerability has been resolved: macvlan: add forgotten nla_policy for IFLA_MACVLAN_BC_CUTOFF The previous commit 954d1fa1ac93 ("macvlan: Add netlink attribute for broadcast cutoff") added one additional attribute named IFLA_MACVLAN_BC_CUTOFF to allow broadcast cutfoff. However, it forgot to describe the nla_policy at macvlan_policy (drivers/net/macvlan.c). Hence, this suppose NLA_S32 (4 bytes) integer can be faked as empty (0 bytes) by a malicious user, which could leads to OOB in heap just like CVE-2023-3773. To fix it, this commit just completes the nla_policy description for IFLA_MACVLAN_BC_CUTOFF. This enforces the length check and avoids the potential OOB read.

linux CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Patch / fix
Weakness type (CWE)
CWE-787

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • linux_kernel

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • 1 total mentions across 1 day

Affected systems

Vendors
linux
Products
linux_kernel

1 version affected across 1 product

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-04-12: 1Patch / Workaround · 2026-04-12: 1Technical Details · 2026-04-12: 104-12
Signal classification1 categories
Patch
1100.0%
Full discourse1 post
  • Giuseppe Paternicola@giuseppe_1337
    Patch

    🚨 HIGH: CVE-2023-53516 (CVSS 7.8) Linux kernel macvlan vulnerability allows local privilege escalation via malformed netlink attributes. OOB heap read/write possible. Patch immediately. #CVE #Vulnerability #PatchNow #ThreatIntel https://t.co/zjB3vuL1WT

    Post summary

    The tweet announces the high‑severity Linux kernel macvlan local privilege escalation CVE‑2023‑53516, details its exploitation vector and impact, and urges an immediate patch.

    0000053
    25 followersView on X
CPE platform detail4 entries

4 of 4 entries

PartVendorProductVersionTarget SWTarget HW
OSlinuxlinux_kernel---
OSlinuxlinux_kernel6.5--
OSlinuxlinux_kernel6.5--
OSlinuxlinux_kernel6.5--

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