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Review reviewHigh

CVE-2026-64452

Linux

In the Linux kernel, the following vulnerability has been resolved: 6lowpan: fix NHC entry use-after-free on error path lowpan_nhc_do_uncompression() looks up an NHC descriptor while holding lowpan_nhc_lock. If the descriptor has no uncompress callback, the error path drops the lock before printing nhc->name. lowpan_nhc_del() removes descriptors under the same lock and then relies on synchronize_net() before the owning module can be unloaded. That only waits for net RX RCU readers. lowpan_header_decompress() is also exported and can be reached from callers that are not necessarily covered b...

CVSS
7.1
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: 6lowpan: fix NHC entry use-after-free on error path lowpan_nhc_do_uncompression() looks up an NHC descriptor while holding lowpan_nhc_lock. If the descriptor has no uncompress callback, the error path drops the lock before printing nhc->name. lowpan_nhc_del() removes descriptors under the same lock and then relies on synchronize_net() before the owning module can be unloaded. That only waits for net RX RCU readers. lowpan_header_decompress() is also exported and can be reached from callers that are not necessarily covered b...

Affected product and versions

Product
Linux
Affected versions
>= 92aa7c65d295f3cbb96904afe335f683e55584b8 < 9c2f5c0829a8c8b904dae36be6d8056b719ac605, >= 92aa7c65d295f3cbb96904afe335f683e55584b8 < 80b5c8779acee0550845394fb3e5176a398aa24c, >= 92aa7c65d295f3cbb96904afe335f683e55584b8 < cc27aea4d454abfb385ee2c9499c78b96db9b728, >= 92aa7c65d295f3cbb96904afe335f683e55584b8 < a8e3a94711134e898c6021a6b77374efa91b3639, >= 92aa7c65d295f3cbb96904afe335f683e55584b8 < 593b78bb3c7ef0c6e9ae6fdf5afa80a5f7573168, >= 92aa7c65d295f3cbb96904afe335f683e55584b8 < 0beccbcf50de125be5520d0ffc59af4bb8655482, >= 92aa7c65d295f3cbb96904afe335f683e55584b8 < b713aa0cc344f10f7a9928a230b5f5e780d04078, >= 92aa7c65d295f3cbb96904afe335f683e55584b8 < 1720db928e5a58ca7d75ac1d514c3b73fd7061a7, >= 4.1
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux 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:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
Not available