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Review reviewHigh

CVE-2023-52776

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix dfs-radar and temperature event locking The ath12k active pdevs are protected by RCU but the DFS-radar and temperature event handling code calling ath12k_mac_get_ar_by_pdev_id() was not marked as a read-side critical section. Mark the code in question as RCU read-side critical sections to avoid any potential use-after-free issues. Note that the temperature event handler looks like a place holder currently but would still trigger an RCU lockdep splat. Compile tested only.

CVSS
8.8
EPSS
0.85%
54.6% percentile
CISA KEV
Not listed
Published
2024.05.22
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.85%
Technical severityCVSS 8.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix dfs-radar and temperature event locking The ath12k active pdevs are protected by RCU but the DFS-radar and temperature event handling code calling ath12k_mac_get_ar_by_pdev_id() was not marked as a read-side critical section. Mark the code in question as RCU read-side critical sections to avoid any potential use-after-free issues. Note that the temperature event handler looks like a place holder currently but would still trigger an RCU lockdep splat. Compile tested only.

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= d889913205cf7ebda905b1e62c5867ed4e39f6c2 < 774de37c147fea81f2c2e4be5082304f4f71d535, >= d889913205cf7ebda905b1e62c5867ed4e39f6c2 < d7a5f7f76568e48869916d769e28b9f3ca70c78e, >= d889913205cf7ebda905b1e62c5867ed4e39f6c2 < 69bd216e049349886405b1c87a55dce3d35d1ba7, >= 6.3, >= 6.3 < 6.5.13, >= 6.6 < 6.6.3
Fixed versions
6.5.13, 6.6.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416
CVE-2023-52776 — Linux Linux, linux kernel | SECUFOCUS NOW