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CVE-2022-50300 (GCVE-0-2022-50300)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:45 – Updated: 2026-08-05 08:58
VLAI
Title
btrfs: fix extent map use-after-free when handling missing device in read_one_chunk
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map use-after-free when handling missing device in read_one_chunk Store the error code before freeing the extent_map. Though it's reference counted structure, in that function it's the first and last allocation so this would lead to a potential use-after-free. The error can happen eg. when chunk is stored on a missing device and the degraded mount option is missing. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216721
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: adfb69af7d8cb6a3958f75aad1ef4bc96891d116 , < b8e7ed42bc3ca0d0e4191ee394d34962d3624c22 (git)
Affected: adfb69af7d8cb6a3958f75aad1ef4bc96891d116 , < fce3713197ebba239e1c7e02174ed216ea1ee014 (git)
Affected: adfb69af7d8cb6a3958f75aad1ef4bc96891d116 , < 169a4cf46882974d4db6d85eb623ec898e51bbc0 (git)
Affected: adfb69af7d8cb6a3958f75aad1ef4bc96891d116 , < 1742e1c90c3da344f3bb9b1f1309b3f47482756a (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 5.15.87 , ≤ 5.15.* (semver)
Unaffected: 6.0.18 , ≤ 6.0.* (semver)
Unaffected: 6.1.4 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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