CVE-2026-98947: Linux kernel · vsock: Fix memory leak in vmci_transport_recv_dgram_cb()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in 9907db2b8e7ba70b442bb9dec86526a6511fac62 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 17:30 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 9907db2b8e7ba70b442bb9dec86526a6511fac62, 4835dbcde5cc3ae37e0d0796052056b35fcae8bf, 7c24a4e87e219072e5e106f6791146cbf3b056b3 +1
Exploitation evidence
Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 26 Oct 2026.
What to do
Upgrade Linux kernel to 9907db2b8e7ba70b442bb9dec86526a6511fac62, 4835dbcde5cc3ae37e0d0796052056b35fcae8bf, 7c24a4e87e219072e5e106f6791146cbf3b056b3 or 0f8e2b2045355a0ee2008125e573435504b13cee.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available and has been applied in multiple Linux kernel commits. Users and administrators should update to a Linux kernel version that includes the fix identified by the commits 9907db2b8e7ba70b442bb9dec86526a6511fac62, 4835dbcde5cc3ae37e0d0796052056b35fcae8bf, 7c24a4e87e219072e5e106f6791146cbf3b056b3, and 0f8e2b2045355a0ee2008125e573435504b13cee. No additional mitigation steps are required once patched.
Description
A memory leak vulnerability was identified and fixed in the Linux kernel's vsock component, specifically in the vmci_transport_recv_dgram_cb() function. The issue occurs during the closure of a datagram socket where packets are moved improperly between the socket's backlog and receive queue, causing memory to not be freed. This leak was confirmed by a syzkaller report and has been addressed by adding receive queue cleanup in the socket destructor.
References
- git.kernel.org/stable/c/0f8e2b2045355a0ee2008125e573435504b13cee (opens in a new tab)
- git.kernel.org/stable/c/4835dbcde5cc3ae37e0d0796052056b35fcae8bf (opens in a new tab)
- git.kernel.org/stable/c/9907db2b8e7ba70b442bb9dec86526a6511fac62 (opens in a new tab)
- git.kernel.org/stable/c/7c24a4e87e219072e5e106f6791146cbf3b056b3 (opens in a new tab)