CVE-2026-98233 — net/packet: clear RX owner on VNET header error
In the Linux kernel, the following vulnerability has been resolved: net/packet: clear RX owner on VNET header error Commit 61fad6816fc1 ("net/packet: tpacket_rcv: avoid a producer race condition") added rx_owner_map and made tpacket_rcv() claim a V1 or V2 ring slot before converting the virtio-net header. If the conversion fails, the drop path leaves the slot claimed. With a one-frame TPACKET_V2 ring, an unsupported UDP GSO packet leaves the only slot unavailable, so the ring also drops the next valid packet. Clear the ownership bit on this error path. TPACKET_V3 already clears its block state here.
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 0.2% (30-day exploitation probability)+1
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.
No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.
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).
- No fix documented in the sources: reduce exposure and monitor the vendor advisory.
- 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 2975472e042e0bbfeeabddc5023cb8c011ec5a07version 5.6≥ 5.5.14 and < 5.6≥ 5.4.29 and < 5.5≥ 4.19.114 and < 4.20≥ 4.14.175 and < 4.15version b06e4d3ed4044c2facf10a511d809f9aa29d960eversion 86137342fd4cf52882842aa8d1318b2661f08e8a and 9 moreversion 6fb0e4385928900ccb8697748555b3f54bba5193≥ 61fad6816fc10fb8793a925d5c1256d1c3db0cd2 and < bb10a0084c03a94364aeec542beddc5d49b59f59≥ 61fad6816fc10fb8793a925d5c1256d1c3db0cd2 and < 33ff111d7ba3beb86e28938d6382bb5beabd865a≥ 61fad6816fc10fb8793a925d5c1256d1c3db0cd2 and < 693209a237fc548791cf402441db8b68d1da7d38≥ 61fad6816fc10fb8793a925d5c1256d1c3db0cd2 and < 805edbdcb8681da5f7ee43b3c3c809f7a8c31208≥ 61fad6816fc10fb8793a925d5c1256d1c3db0cd2 and < 49a48a5aaf85fe69d2dc3fb334b4854fadf44e39≥ 61fad6816fc10fb8793a925d5c1256d1c3db0cd2 and < 23cd30498891d29a69ec9b75bd92f8a0f21f1342≥ 61fad6816fc10fb8793a925d5c1256d1c3db0cd2 and < 2daa618e7ff19eefcbda281bc4c5998c4140f9cf≥ 61fad6816fc10fb8793a925d5c1256d1c3db0cd2 and < b8c0cb3069058c2d67b5c7c833b2833381ecffdc |
Vulnerable | CVE Program (cve.org) e CISA ADP |
EPSS over time FIRST
Oct 13, 2026 → Oct 15, 2026 · 3 reading(s) · max 0.18%
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Not enough vector or weakness data: use the affected application’s logs as a starting point.
Timeline
What happened to this CVE, newest first.
- 2026
- Record published
- Affected products added · linux/linux
- Source status changed · → Received
- 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
8 on the record
- git.kernel.org/stable/c/693209a237fc548791cf402441db8b68d1da7d38
- git.kernel.org/stable/c/2daa618e7ff19eefcbda281bc4c5998c4140f9cf
- git.kernel.org/stable/c/23cd30498891d29a69ec9b75bd92f8a0f21f1342
- git.kernel.org/stable/c/33ff111d7ba3beb86e28938d6382bb5beabd865a
- git.kernel.org/stable/c/bb10a0084c03a94364aeec542beddc5d49b59f59
- git.kernel.org/stable/c/b8c0cb3069058c2d67b5c7c833b2833381ecffdc
- git.kernel.org/stable/c/805edbdcb8681da5f7ee43b3c3c809f7a8c31208
- git.kernel.org/stable/c/49a48a5aaf85fe69d2dc3fb334b4854fadf44e39
Elsewhere on this site
Related CVEs (same products)
- Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 1d
- Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 1d
- Unknown CVE-2026-98431 RDMA/uverbs: Fix mmap_lock/disassociation_lock circular dependency 2d
- Unknown CVE-2026-98430 RDMA/efa: Keep admin queues alive while IRQ is registered 2d
- Unknown CVE-2026-98429 RDMA/efa: Keep EQ resources alive while IRQ is registered 2d
- Unknown CVE-2026-98428 ALSA: usb: 6fire: Avoid embedded URBs 2d
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 CVSS score published by NVD, the CNA, CISA or GitHub so far.
- No fixed version, patch or mitigation documented.
- 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-2026-98233 is "net/packet: clear RX owner on VNET header error", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.18% 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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