CVE-2026-53215 — Linux kernel mvpp2 Ethernet driver: RX buffer returned to hardware pool while still in use
In the Linux kernel, the following vulnerability has been resolved: net: mvpp2: refill RX buffers before XDP or skb use The RX error path returns the current descriptor buffer to the hardware BM pool. That is only valid while the driver still owns the buffer. mvpp2_rx_refill() can fail after the current buffer has been handed to XDP or attached to an skb. In those cases mvpp2_run_xdp() may have recycled, redirected, or queued the page for XDP_TX, and an skb free also retires the data buffer. Returning such a buffer to BM lets hardware DMA into memory that is no longer owned by the RX ring. Refill the BM pool before handing the current buffer to XDP or to the skb. If the allocation fails there, drop the packet and return the still-owned current buffer to BM, preserving the pool depth. Once the refill succeeds, later local drops retire/free the current buffer instead of returning it to BM.
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- EPSS 0.5% (30-day exploitation probability)+6
- Technical severity (critical)+10
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Linux Linux, Linux Linux Kernel).
- The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
- Apply the fixed version or the patch documented under Remediation.
- Search available logs for exploit probes, errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Linux | Linux |
version 5.9≥ 5.8.2 and < 5.9≥ 5.7.15 and < 5.8version fba2cf348d9eb50b2049a73cc09313dab6d293f1version 95a936364f2685e9e040c6b179b553604d96de22≥ 07dd0a7aae7f72af7cec18909581c2bb570edddc and < 5e8e2a9624df72fca7c736b2966b2cbf6c9c3ff6≥ 07dd0a7aae7f72af7cec18909581c2bb570edddc and < 02e1b5c4d3b4c658b72c145427cded1bba613fc1≥ 07dd0a7aae7f72af7cec18909581c2bb570edddc and < 8a2126c5afe89f8ceeb60a3afb9f075b736194cd and 4 more≥ 07dd0a7aae7f72af7cec18909581c2bb570edddc and < d0c8c4fbd22d260fe28530260656c5fb3c20ce84≥ 07dd0a7aae7f72af7cec18909581c2bb570edddc and < 580f92f27cb8724bcc4be98ee89890eab524a2ae≥ 07dd0a7aae7f72af7cec18909581c2bb570edddc and < a03cdcedb2cbcc42551dc3e4746929e93c5352d5≥ 07dd0a7aae7f72af7cec18909581c2bb570edddc and < a88b3293b556f4d8fba11db9a8061a6b0d3b69e6 |
Vulnerable | CVE Program (cve.org) e CISA ADP |
| Linux | Linux Kernel |
version 7.1-rc7≥ 5.7.15 and < 5.8version 7.1-rc6version 7.1-rc5version 7.1-rc4version 7.1-rc3version 7.1-rc2version 7.1-rc1 and 6 more≥ 6.19 and < 7.0.13≥ 6.13 and < 6.18.36≥ 6.7 and < 6.12.94≥ 6.2 and < 6.6.143≥ 5.16 and < 6.1.176≥ 5.8.2 and < 5.15.210 |
Vulnerable | NIST National Vulnerability Database |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 9.8 | CVSS 3.1 | Critical | 3.9 | 5.9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database |
| 9.8 | CVSS 3.1 | Critical | — | — | Linux via CVE Program (cve.org) e CISA ADP |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (score shown at the top: 416baaa9-dc9f-4396-8d5f-8c081fb06d67) EPSS over time FIRST
Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.74%
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Analysis and videos
CVE-2026-53215: Linux kernel mvpp2 Ethernet driver: RX buffer returned to hardware pool while still in use
A fix in the mvpp2 network driver of the Linux kernel addresses a case where a receive buffer could be returned to the hardware buffer manager after the driver had already handed it to XDP or to a socket buffer. The record says this could let hardware DMA into memory the RX ring no longer owns, and the CNA rates it 9.8 (critical, CVSS 3.1). Commits fixing the issue are linked for several stable branches.
Timeline
What happened to this CVE, newest first.
- 2026
- Affected products added · linux/linux
- Record published
- Fix documented
- CVSS changed · 9.8
- Source status changed · → Analyzed
- Record created in this database
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 1× Official description updated · Oct 13, 2026 – Oct 13, 2026
References
7 on the record
- git.kernel.org/stable/c/8a2126c5afe89f8ceeb60a3afb9f075b736194cd
- git.kernel.org/stable/c/d0c8c4fbd22d260fe28530260656c5fb3c20ce84
- git.kernel.org/stable/c/580f92f27cb8724bcc4be98ee89890eab524a2ae
- git.kernel.org/stable/c/5e8e2a9624df72fca7c736b2966b2cbf6c9c3ff6
- git.kernel.org/stable/c/a03cdcedb2cbcc42551dc3e4746929e93c5352d5
- git.kernel.org/stable/c/02e1b5c4d3b4c658b72c145427cded1bba613fc1
- git.kernel.org/stable/c/a88b3293b556f4d8fba11db9a8061a6b0d3b69e6
Elsewhere on this site
Related CVEs (same products)
- Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 10h
- Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 10h
- Unknown CVE-2026-98431 RDMA/uverbs: Fix mmap_lock/disassociation_lock circular dependency 1d
- Unknown CVE-2026-98430 RDMA/efa: Keep admin queues alive while IRQ is registered 1d
- Unknown CVE-2026-98429 RDMA/efa: Keep EQ resources alive while IRQ is registered 1d
- Unknown CVE-2026-98428 ALSA: usb: 6fire: Avoid embedded URBs 1d
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No CISA SSVC assessment.
- No CWE classification.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2026-53215 is "Linux kernel mvpp2 Ethernet driver: RX buffer returned to hardware pool while still in use", rated Critical. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 9.8 describes technical severity. EPSS 0.50% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
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