CVE-2026-31532 (GCVE-0-2026-31532)

Vulnerability from cvelistv5 – Published: 2026-04-23 11:12 – Updated: 2026-06-14 17:41
VLAI
Title
can: raw: fix ro->uniq use-after-free in raw_rcv()
Summary
In the Linux kernel, the following vulnerability has been resolved: can: raw: fix ro->uniq use-after-free in raw_rcv() raw_release() unregisters raw CAN receive filters via can_rx_unregister(), but receiver deletion is deferred with call_rcu(). This leaves a window where raw_rcv() may still be running in an RCU read-side critical section after raw_release() frees ro->uniq, leading to a use-after-free of the percpu uniq storage. Move free_percpu(ro->uniq) out of raw_release() and into a raw-specific socket destructor. can_rx_unregister() takes an extra reference to the socket and only drops it from the RCU callback, so freeing uniq from sk_destruct ensures the percpu area is not released until the relevant callbacks have drained. [mkl: applied manually]
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 514ac99c64b22d83b52dfee3b8becaa69a92bc4a , < 1de30576a6dfeaaa27ef91fa272e6b9240b6fbd3 (git)
Affected: 514ac99c64b22d83b52dfee3b8becaa69a92bc4a , < 64c8553decf5a5f2417bd54761ea0a832c56c4ca (git)
Affected: 514ac99c64b22d83b52dfee3b8becaa69a92bc4a , < 3f43f12fde34737fba091b7e3ab391e14ddbb0be (git)
Affected: 514ac99c64b22d83b52dfee3b8becaa69a92bc4a , < 5e9cfffad898bbeaafd0ea608a6d267362f050fc (git)
Affected: 514ac99c64b22d83b52dfee3b8becaa69a92bc4a , < 572f0bf536ebc14f6e7da3d21a85cf076de8358e (git)
Affected: 514ac99c64b22d83b52dfee3b8becaa69a92bc4a , < 1a0f2de81f7fbdc538fc72d7d74609b79bc83cc0 (git)
Affected: 514ac99c64b22d83b52dfee3b8becaa69a92bc4a , < 7201a531b9a5ed892bfda5ded9194ef622de8ffa (git)
Affected: 514ac99c64b22d83b52dfee3b8becaa69a92bc4a , < 34c1741254ff972e8375faf176678a248826fe3a (git)
Affected: 514ac99c64b22d83b52dfee3b8becaa69a92bc4a , < a535a9217ca3f2fccedaafb2fddb4c48f27d36dc (git)
Create a notification for this product.
Linux Linux Affected: 4.1
Unaffected: 0 , < 4.1 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0.1 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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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.

Sightings

Author Source Type Date Other

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.