CVE-2023-53495 (GCVE-0-2023-53495)
Vulnerability from cvelistv5 – Published: 2025-10-01 11:45 – Updated: 2026-08-05 09:14
VLAI
EPSS
VEX
Title
net: ethernet: mvpp2_main: fix possible OOB write in mvpp2_ethtool_get_rxnfc()
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: ethernet: mvpp2_main: fix possible OOB write in mvpp2_ethtool_get_rxnfc()
rules is allocated in ethtool_get_rxnfc and the size is determined by
rule_cnt from user space. So rule_cnt needs to be check before using
rules to avoid OOB writing or NULL pointer dereference.
Severity
7.8 (High)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
90b509b39ac9b09be88eb641c7a3abd8de06b698 , < ba6673824efa3dc198b04a54e69dce480066d7d9
(git)
Affected: 90b509b39ac9b09be88eb641c7a3abd8de06b698 , < 61054a8ddb176b155a8f2bacdfefb3727187f5d9 (git) Affected: 90b509b39ac9b09be88eb641c7a3abd8de06b698 , < 5bb09dddc724c5f7c4dc6dd3bfebd685eecd93e8 (git) Affected: 90b509b39ac9b09be88eb641c7a3abd8de06b698 , < 349638f7e5d3c7d328565587bb7b0454bbee02e2 (git) Affected: 90b509b39ac9b09be88eb641c7a3abd8de06b698 , < 625b70d31dd4df4b96b3ddcbe251debb33bd67f5 (git) Affected: 90b509b39ac9b09be88eb641c7a3abd8de06b698 , < 51fe0a470543f345e3c62b6798929de3ddcedc1d (git) |
guessed | |
| Linux | Linux |
Affected:
5.2
Unaffected: 0 , < 5.2 (semver) Unaffected: 5.4.257 , ≤ 5.4.* (semver) Unaffected: 5.10.195 , ≤ 5.10.* (semver) Unaffected: 5.15.132 , ≤ 5.15.* (semver) Unaffected: 6.1.54 , ≤ 6.1.* (semver) Unaffected: 6.5.4 , ≤ 6.5.* (semver) Unaffected: 6.6 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "AV:L - The vulnerability is reached through the `SIOCETHTOOL` ioctl on a local socket (`dev_ioctl` \u2192 `dev_ethtool` \u2192 `mvpp2_ethtool_get_rxnfc`), requiring a local process on the system. No remote or adjacent-network input reaches this code path.\nAC:L - The attacker fully controls `info.rule_cnt` and can deterministically choose the undersized (or NULL) buffer; there is no race, no secret to guess, and no memory-layout dependency, and `queue_mode` defaults to the multi-queue mode that enables the path. The only precondition is a persistent, standard ntuple flow-steering configuration, after which the attack succeeds 100% of the time and can be repeated at will.\nPR:L - `ETHTOOL_GRXCLSRLALL` is explicitly listed in `__dev_ethtool()`\u0027s \"Allow some commands to be done by anyone\" whitelist, so it bypasses the `ns_capable(net-\u003euser_ns, CAP_NET_ADMIN)` check \u2014 any unprivileged local user, including one confined to a sandbox or container, can invoke it. Only a basic local account is needed, not root or CAP_NET_ADMIN.\nUI:N - The attacker performs the entire attack with a single ioctl from their own process; no victim action is required at attack time. The pre-existing ntuple rule configuration is ambient system state, not an interaction the attacker must induce.\nS:U - The out-of-bounds write corrupts kernel slab memory within the same kernel security authority, and the resulting RTNL deadlock/panic affects the same OS instance. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a heap out-of-bounds write into adjacent `kmalloc-8`/`kmalloc-16` objects reachable by any unprivileged user, and such slab corruption \u2014 including of SLUB freelist pointers and neighbouring length/index fields \u2014 can be groomed via userspace heap spraying into a kernel memory disclosure primitive. Per kernel scoring guidance, memory corruption leverageable for info disclosure is scored High.\nI:H - `rules[loc++] = i` writes up to 16 bytes into an attacker-sized 4/8/12-byte allocation, a genuine out-of-bounds slab write that lets the attacker overwrite fields of adjacent heap objects. Out-of-bounds writes are scored High as they are the classic basis for control-flow hijacking and privilege escalation.\nA:H - With `rule_cnt = 0` the driver writes through a NULL `rule_buf`, causing an immediate kernel oops, and the OOB variant corrupts slab freelists leading to later crashes. Because `dev_ethtool()` holds `rtnl_lock()` across the call, the oops leaves RTNL permanently held \u2014 wedging all networking configuration system-wide with unkillable D-state tasks, or panicking outright on the `panic_on_oops` appliance/embedded systems typical of mvpp2 hardware."
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"redhat_vex": {
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"current_release_date": "2026-06-30T10:14:11+00:00",
"cve": "CVE-2023-53495",
"id": "CVE-2023-53495",
"initial_release_date": "2023-01-01T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: net: ethernet: mvpp2_main: fix possible OOB write in mvpp2_ethtool_get_rxnfc()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53495.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-02T01:43:47Z",
"cve": "CVE-2023-53495",
"id": "CVE-2023-53495",
"initial_release_date": "2025-10-01T23:30:12Z",
"product_status:known_affected": "524",
"product_status:known_not_affected": "263",
"product_status:recommended": "310",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2023-53495",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53495.json",
"version": "51"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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