CVE-2026-72329: Linux kernel · net/liquidio: drop cached VF pci_dev LUT
Affects Linux kernelSource CVE Database V5
Not known to be exploited · CVSS 9.3 Critical · fixed in e3b20de8d7c06c8f1a0ded1e52be9d282609c3da : patch Linux kernel as a priority.
Data as of 26 Oct 2026, 12:55 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Total control over the software or total information disclosure
CISA SSVC assessment, 2026-10-16.
- Patch
- Available – fixed in e3b20de8d7c06c8f1a0ded1e52be9d282609c3da, 81acef3a247fd523513a2e9f71de1c167bc0f882, 08ff33dce6f91510bb296a753a232db0ca3fd3d8 +2
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 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 to a fixed release listed under Affected software.
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
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| LinuxLinux | Affected
| Fixed in– |
Description
In the Linux kernel, the following vulnerability has been resolved: net/liquidio: drop cached VF pci_dev LUT The PF SR-IOV enable path caches VF pci_dev pointers in dpiring_to_vfpcidev_lut[] by iterating with pci_get_device(). Those entries do not own a reference, because the iterator drops the previous device reference on each step. The cached pointer is then dereferenced later when handling OCTEON_VF_FLR_REQUEST. Replace the cached VF mapping with runtime lookup on the mailbox DPI ring: derive the VF index from q_no, resolve the VF via exported PCI IOV helpers, validate it with the PF pointer and VF ID, then issue pcie_flr() and drop the reference with pci_dev_put(). Remove the unused VF lookup table initialization and cleanup.
References
- git.kernel.org/stable/c/e3b20de8d7c06c8f1a0ded1e52be9d282609c3da (opens in a new tab)
- git.kernel.org/stable/c/1cf5c6a80adc31456f3e93b2922a2446fd63e2c4 (opens in a new tab)
- git.kernel.org/stable/c/08ff33dce6f91510bb296a753a232db0ca3fd3d8 (opens in a new tab)
- git.kernel.org/stable/c/81acef3a247fd523513a2e9f71de1c167bc0f882 (opens in a new tab)
- git.kernel.org/stable/c/5c0e3ba4f500fd4314ceb42f07f16bc445156431 (opens in a new tab)