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VulnerabilityPublished Updated

CVE-2026-97616: Linux kernel · net/sched: act_api: release all action references on NEWACTION failure

Source GCVE Database

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Authoritative record:CVE-2026-97616· Medium

Not known to be exploited · fixed in f908c8a969946a45225fd7f9d9a85771e12ae0a8 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 17:20 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in f908c8a969946a45225fd7f9d9a85771e12ae0a8, e469765708b1afa9b9565dbafca09e22ec4edfa7, b7133be1faa35b38f68d78a9f950f1dddf3eb8e5 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 55334a5db5cd32b207ac697cec3ec8e078f345d4, < f908c8a969946a45225fd7f9d9a85771e12ae0a8
Fixed in
  • f908c8a969946a45225fd7f9d9a85771e12ae0a8
LinuxLinuxAffected
  • ≥ 55334a5db5cd32b207ac697cec3ec8e078f345d4, < e469765708b1afa9b9565dbafca09e22ec4edfa7
Fixed in
  • e469765708b1afa9b9565dbafca09e22ec4edfa7
LinuxLinuxAffected
  • ≥ 55334a5db5cd32b207ac697cec3ec8e078f345d4, < b7133be1faa35b38f68d78a9f950f1dddf3eb8e5
Fixed in
  • b7133be1faa35b38f68d78a9f950f1dddf3eb8e5
LinuxLinuxAffected
  • ≥ 55334a5db5cd32b207ac697cec3ec8e078f345d4, < b83a51a83e85411c050c7b16cdc43b331c6565be
Fixed in
  • b83a51a83e85411c050c7b16cdc43b331c6565be
LinuxLinuxAffected
  • ≥ 55334a5db5cd32b207ac697cec3ec8e078f345d4, < 048617743febf6530111cfb594e9bbbd7918bf67
Fixed in
  • 048617743febf6530111cfb594e9bbbd7918bf67
LinuxLinuxAffected
  • ≥ 55334a5db5cd32b207ac697cec3ec8e078f345d4, < 478eb5abb51931a152abab068f8a717b7ff480fd
Fixed in
  • 478eb5abb51931a152abab068f8a717b7ff480fd

AI-suggested

A fix has been implemented in the Linux kernel to address this issue by changing the cleanup logic to properly release all action references on failure. Users should update to the fixed kernel version once available. No other mitigation or workaround is indicated.

Description

A vulnerability in the Linux kernel's network scheduler (net/sched) action API was resolved. The flaw involves improper release of action references when a batched RTM_NEWACTION request fails to initialize an action. This leads to a resource leak where temporary references and IDR slots are not properly released, preventing reuse of indexes and potentially causing resource exhaustion.

References

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