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Vulnerabilities

Vulnerability · CVE-2023-53121

In the Linux kernel, the following vulnerability has been resolved: tcp: tcp_make_synack() can be called from process context tcp_rtx_synack() now could be called in process contex

Published May 2, 2025 · catalog updated May 11, 2026 · Linux Linux

Check this week

CVE-2023-53121 is not in CISA KEV. FIRST estimates a 19.00% chance of exploitation in the next 30 days. Check whether you run Linux Linux.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
None0.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
19.00%
Remediation
Version ranges on file
Affected products
vendor Linux Linux 8336886f786fdacbc19b719c1f7ea91eb70706d4 <e23ca307745be3df7fe9762f3e2a7e311a57852e

In the Linux kernel, the following vulnerability has been resolved: tcp: tcp_make_synack() can be called from process context tcp_rtx_synack() now could be called in process context as explained in 0a375c822497 ("tcp: tcp_rtx_synack() can be called from process context"). tcp_rtx_synack() might call tcp_make_synack(), which will touch per-CPU variables with preemption enabled. This causes the following BUG: BUG: using __this_cpu_add() in preemptible [00000000] code: ThriftIO1/5464 caller is tcp_make_synack+0x841/0xac0 Call Trace: dump_stack_lvl+0x10d/0x1a0 check_preemption_disabled+0x104/0x110

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux Linux 8336886f786fdacbc19b719c1f7ea91eb70706d4 <e23ca307745be3df7fe9762f3e2a7e311a57852e8336886f786fdacbc19b719c1f7ea91eb70706d4 <e23ca307745be3df7fe9762f3e2a7e311a57852e

How to fix CVE-2023-53121

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2023-53121 is not in CISA KEV. FIRST estimates a 19.00% chance of exploitation in the next 30 days. Check whether you run Linux Linux.

Which versions are affected?

Compare what you have installed with Linux Linux 8336886f786fdacbc19b719c1f7ea91eb70706d4 <e23ca307745be3df7fe9762f3e2a7e311a57852e 8336886f786fdacbc19b719c1f7ea91eb70706d4 <e23ca307745be3df7fe9762f3e2a7e311a57852e. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 19.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 2, 2025 · EUVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: tcp: tcp_make_synack() can be called from process context tcp_rtx_synack() now could be called in process context as explained in 0a375c822497 ("tcp: tcp_rtx_synack() can be called from process context"). tcp_rtx_synack() might call tcp_make_synack(), which will touch per-CPU variables with preemption enabled. This causes the foll

  2. May 11, 2026 · EUVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: tcp: tcp_make_synack() can be called from process context tcp_rtx_synack() now could be called in process context as explained in 0a375c822497 ("tcp: tcp_rtx_synack() can be called from process context"). tcp_rtx_synack() might call tcp_make_synack(), which will touch per-CPU variables with preemption enabled. This causes the foll

Sources

  • CVE.orgVulnerability recordCVE-2023-53121

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-13141

    In the Linux kernel, the following vulnerability has been resolved: tcp: tcp_make_synack() can be called from process context tcp_rtx_synack() now could be called in process context as explained in 0a375c822497 ("tcp: tcp_rtx_synack() can be called from process context"). tcp_rtx

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.