CVE-2022-49085 (GCVE-0-2022-49085)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:54 – Updated: 2025-05-04 08:29
VLAI?
Title
drbd: Fix five use after free bugs in get_initial_state
Summary
In the Linux kernel, the following vulnerability has been resolved: drbd: Fix five use after free bugs in get_initial_state In get_initial_state, it calls notify_initial_state_done(skb,..) if cb->args[5]==1. If genlmsg_put() failed in notify_initial_state_done(), the skb will be freed by nlmsg_free(skb). Then get_initial_state will goto out and the freed skb will be used by return value skb->len, which is a uaf bug. What's worse, the same problem goes even further: skb can also be freed in the notify_*_state_change -> notify_*_state calls below. Thus 4 additional uaf bugs happened. My patch lets the problem callee functions: notify_initial_state_done and notify_*_state_change return an error code if errors happen. So that the error codes could be propagated and the uaf bugs can be avoid. v2 reports a compilation warning. This v3 fixed this warning and built successfully in my local environment with no additional warnings. v2: https://lore.kernel.org/patchwork/patch/1435218/
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < 0489700bfeb1e53eb2039c2291c67e71b0b40103 (git)
Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < dcf6be17b5c53b741898d2223b23e66d682de300 (git)
Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < 188fe6b26765edbad4055611c0f788b6870f4024 (git)
Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < b6a4055036eed1f5e239ce3d8b0db1ce38bba447 (git)
Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < 594205b4936771a250f9d141e7e0fff21c3dd2d9 (git)
Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < a972c768723359ec995579902473028fe3cd64b1 (git)
Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < de63e74da2333b4068bb79983e632db730fea97e (git)
Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < 226e993c39405292781bfcf4b039a8db56aab362 (git)
Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < aadb22ba2f656581b2f733deb3a467c48cc618f6 (git)
Create a notification for this product.
    Linux Linux Affected: 4.5
Unaffected: 0 , < 4.5 (semver)
Unaffected: 4.9.311 , ≤ 4.9.* (semver)
Unaffected: 4.14.276 , ≤ 4.14.* (semver)
Unaffected: 4.19.238 , ≤ 4.19.* (semver)
Unaffected: 5.4.189 , ≤ 5.4.* (semver)
Unaffected: 5.10.111 , ≤ 5.10.* (semver)
Unaffected: 5.15.34 , ≤ 5.15.* (semver)
Unaffected: 5.16.20 , ≤ 5.16.* (semver)
Unaffected: 5.17.3 , ≤ 5.17.* (semver)
Unaffected: 5.18 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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      "dataVersion": "5.1"
    }
  }
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • 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.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • 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.



Detection rules are retrieved from Rulezet.