Kernel memory use-after-free via request counter access
Published Jun 24, 2026 · Updated Jun 24, 2026
Use-after-free in the Linux Kernel SEC2 crypto driver allows remote attackers to trigger an invalid freed-memory access during packet transmission. Under heavy load, qp_send_message increments the send counter through req->ctx after hardware completion can free req, even though qp_ctx remains valid. The race requires the HiSilicon SEC2 packet path and heavy system load; the published record identifies the invalid kernel access but no demonstrated post-corruption outcome.
Summary
What happened
Use-after-free in the Linux Kernel SEC2 crypto driver allows remote attackers to trigger an invalid freed-memory access during packet transmission. Under heavy load, qp_send_message increments the send counter through req->ctx after hardware completion can free req, even though qp_ctx remains valid. The race requires the HiSilicon SEC2 packet path and heavy system load; the published record identifies the invalid kernel access but no demonstrated post-corruption outcome.
The record
- CVE
- CVE-2026-53055
- Published
- Jun 24, 2026
- Updated
- Jun 24, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-416
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 24, 2026CVE publishedPublication date reported by the CVE source.
- Jun 24, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.17
- Affected versionversion=f0ae287c50455f7be0d8dd45a803d403c7aa4d2e <67b53a660e6bf0da2fa8d8872e897a14d8059eaf
- Affected versionversion=f0ae287c50455f7be0d8dd45a803d403c7aa4d2e <ad73563f3a1edbfddf2724136c6a15826b354e18
- Affected versionversion=f0ae287c50455f7be0d8dd45a803d403c7aa4d2e <b375c3c7209cc59e40e97998aa9bc768369cca0e
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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