Vulnerability-Lookup

CVE-2023-54074 (GCVE-0-2023-54074)

Vulnerability from cvelistv5 – Published: 2025-12-24 12:23 – Updated: 2026-08-05 09:16

Title

net/mlx5e: Use correct encap attribute during invalidation

Summary

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Use correct encap attribute during invalidation With introduction of post action infrastructure most of the users of encap attribute had been modified in order to obtain the correct attribute by calling mlx5e_tc_get_encap_attr() helper instead of assuming encap action is always on default attribute. However, the cited commit didn't modify mlx5e_invalidate_encap() which prevents it from destroying correct modify header action which leads to a warning [0]. Fix the issue by using correct attribute. [0]: Feb 21 09:47:35 c-237-177-40-045 kernel: WARNING: CPU: 17 PID: 654 at drivers/net/ethernet/mellanox/mlx5/core/en_tc.c:684 mlx5e_tc_attach_mod_hdr+0x1cc/0x230 [mlx5_core] Feb 21 09:47:35 c-237-177-40-045 kernel: RIP: 0010:mlx5e_tc_attach_mod_hdr+0x1cc/0x230 [mlx5_core] Feb 21 09:47:35 c-237-177-40-045 kernel: Call Trace: Feb 21 09:47:35 c-237-177-40-045 kernel: <TASK> Feb 21 09:47:35 c-237-177-40-045 kernel: mlx5e_tc_fib_event_work+0x8e3/0x1f60 [mlx5_core] Feb 21 09:47:35 c-237-177-40-045 kernel: ? mlx5e_take_all_encap_flows+0xe0/0xe0 [mlx5_core] Feb 21 09:47:35 c-237-177-40-045 kernel: ? lock_downgrade+0x6d0/0x6d0 Feb 21 09:47:35 c-237-177-40-045 kernel: ? lockdep_hardirqs_on_prepare+0x273/0x3f0 Feb 21 09:47:35 c-237-177-40-045 kernel: ? lockdep_hardirqs_on_prepare+0x273/0x3f0 Feb 21 09:47:35 c-237-177-40-045 kernel: process_one_work+0x7c2/0x1310 Feb 21 09:47:35 c-237-177-40-045 kernel: ? lockdep_hardirqs_on_prepare+0x3f0/0x3f0 Feb 21 09:47:35 c-237-177-40-045 kernel: ? pwq_dec_nr_in_flight+0x230/0x230 Feb 21 09:47:35 c-237-177-40-045 kernel: ? rwlock_bug.part.0+0x90/0x90 Feb 21 09:47:35 c-237-177-40-045 kernel: worker_thread+0x59d/0xec0 Feb 21 09:47:35 c-237-177-40-045 kernel: ? __kthread_parkme+0xd9/0x1d0

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root Scorecard

References

3 references

URL	Tags
https://git.kernel.org/stable/c/00959a1bad58e4b6c…
https://git.kernel.org/stable/c/b8b4292fdd8818ab4…
https://git.kernel.org/stable/c/be071cdb167fc3e25…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 8300f225268be9ee2c0daf5a3f23929fcdcbf213 , < 00959a1bad58e4b6c14a2729f84d354255073609 (git) Affected: 8300f225268be9ee2c0daf5a3f23929fcdcbf213 , < b8b4292fdd8818ab43b943b6717811651f51e39f (git) Affected: 8300f225268be9ee2c0daf5a3f23929fcdcbf213 , < be071cdb167fc3e25fe81922166b3d499d23e8ac (git)	guessed
Linux	Linux	Affected: 5.18 Unaffected: 0 , < 5.18 (semver) Unaffected: 6.1.31 , ≤ 6.1.* (semver) Unaffected: 6.3.5 , ≤ 6.3.* (semver) Unaffected: 6.4 , ≤ * (original_commit_for_fix)	guessed

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Use correct encap attribute during invalidation\n\nWith introduction of post action infrastructure most of the users of encap\nattribute had been modified in order to obtain the correct attribute by\ncalling mlx5e_tc_get_encap_attr() helper instead of assuming encap action\nis always on default attribute. However, the cited commit didn\u0027t modify\nmlx5e_invalidate_encap() which prevents it from destroying correct modify\nheader action which leads to a warning [0]. Fix the issue by using correct\nattribute.\n\n[0]:\n\nFeb 21 09:47:35 c-237-177-40-045 kernel: WARNING: CPU: 17 PID: 654 at drivers/net/ethernet/mellanox/mlx5/core/en_tc.c:684 mlx5e_tc_attach_mod_hdr+0x1cc/0x230 [mlx5_core]\nFeb 21 09:47:35 c-237-177-40-045 kernel: RIP: 0010:mlx5e_tc_attach_mod_hdr+0x1cc/0x230 [mlx5_core]\nFeb 21 09:47:35 c-237-177-40-045 kernel: Call Trace:\nFeb 21 09:47:35 c-237-177-40-045 kernel:  \u003cTASK\u003e\nFeb 21 09:47:35 c-237-177-40-045 kernel:  mlx5e_tc_fib_event_work+0x8e3/0x1f60 [mlx5_core]\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? mlx5e_take_all_encap_flows+0xe0/0xe0 [mlx5_core]\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? lock_downgrade+0x6d0/0x6d0\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? lockdep_hardirqs_on_prepare+0x273/0x3f0\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? lockdep_hardirqs_on_prepare+0x273/0x3f0\nFeb 21 09:47:35 c-237-177-40-045 kernel:  process_one_work+0x7c2/0x1310\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? lockdep_hardirqs_on_prepare+0x3f0/0x3f0\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? pwq_dec_nr_in_flight+0x230/0x230\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? rwlock_bug.part.0+0x90/0x90\nFeb 21 09:47:35 c-237-177-40-045 kernel:  worker_thread+0x59d/0xec0\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? __kthread_parkme+0xd9/0x1d0"
        }
      ],
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            "baseSeverity": "HIGH",
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            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable path requires locally installed offloaded tc flower rules on an mlx5 representor in switchdev mode, and is driven by local FIB/route notifier events rather than by processing attacker-supplied packets. There is no remote packet-parsing path into `mlx5e_invalidate_encap()`.\nAC:L - No race or unpredictable state is involved \u2014 any flow whose encap action sits on a post-action attribute (encap combined with CT/sample, the standard OVS-offload configuration) deterministically takes the wrong-attribute path on every route invalidation. Route flaps that trigger it are freely repeatable.\nPR:L - Installing the offloaded tc flower encap+CT rules and changing routes requires CAP_NET_ADMIN, which per kernel CNA convention is scored as low privilege rather than full root. No further authentication gate exists past that point.\nUI:N - Once the offloaded flows exist, the bug fires automatically from the FIB notifier workqueue on a route replace or delete. No victim action is needed.\nS:U - The corruption and crash are confined to the kernel\u0027s own security authority; although incorrect eswitch steering rules can affect VF traffic separation, the vulnerable and impacted components share the same kernel privilege domain.\nC:H - The real encap attribute retains `MLX5_ESW_DEST_ENCAP_VALID` with a dangling pointer to the freed `pkt_reformat` object, and that stale pointer is consumed by `esw_setup_vport_dest()`/`mlx5_cmd_set_fte()` \u2014 a use-after-free read of reallocated heap contents that can also cause packets to be encapsulated/steered with stale headers, leaking data across vports.\nI:H - The use-after-free plus the overwritten `attr-\u003emh` and cleared `modify_hdr` let attacker-controlled reallocated heap contents drive hardware flow-steering programming, and rules are reinstalled without their intended header rewrite, corrupting eswitch forwarding state.\nA:H - The path yields a `WARN_ON()` splat (fatal under panic_on_warn), a NULL pointer dereference of `modify_hdr-\u003eid` during reoffload, and an unbounded per-flap leak of mod-header handles and firmware contexts that eventually breaks all rule offload."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:16:58.648Z",
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        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/be071cdb167fc3e25fe81922166b3d499d23e8ac"
        }
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      "title": "net/mlx5e: Use correct encap attribute during invalidation",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54074",
    "datePublished": "2025-12-24T12:23:16.920Z",
    "dateReserved": "2025-12-24T12:21:05.093Z",
    "dateUpdated": "2026-08-05T09:16:58.648Z",
    "state": "PUBLISHED"
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      "date": "2026-10-01",
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      "percentile": "0.03725"
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            "affectedData": [
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                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c"
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                    "versionType": "semver"
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Use correct encap attribute during invalidation\n\nWith introduction of post action infrastructure most of the users of encap\nattribute had been modified in order to obtain the correct attribute by\ncalling mlx5e_tc_get_encap_attr() helper instead of assuming encap action\nis always on default attribute. However, the cited commit didn\u0027t modify\nmlx5e_invalidate_encap() which prevents it from destroying correct modify\nheader action which leads to a warning [0]. Fix the issue by using correct\nattribute.\n\n[0]:\n\nFeb 21 09:47:35 c-237-177-40-045 kernel: WARNING: CPU: 17 PID: 654 at drivers/net/ethernet/mellanox/mlx5/core/en_tc.c:684 mlx5e_tc_attach_mod_hdr+0x1cc/0x230 [mlx5_core]\nFeb 21 09:47:35 c-237-177-40-045 kernel: RIP: 0010:mlx5e_tc_attach_mod_hdr+0x1cc/0x230 [mlx5_core]\nFeb 21 09:47:35 c-237-177-40-045 kernel: Call Trace:\nFeb 21 09:47:35 c-237-177-40-045 kernel:  \u003cTASK\u003e\nFeb 21 09:47:35 c-237-177-40-045 kernel:  mlx5e_tc_fib_event_work+0x8e3/0x1f60 [mlx5_core]\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? mlx5e_take_all_encap_flows+0xe0/0xe0 [mlx5_core]\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? lock_downgrade+0x6d0/0x6d0\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? lockdep_hardirqs_on_prepare+0x273/0x3f0\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? lockdep_hardirqs_on_prepare+0x273/0x3f0\nFeb 21 09:47:35 c-237-177-40-045 kernel:  process_one_work+0x7c2/0x1310\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? lockdep_hardirqs_on_prepare+0x3f0/0x3f0\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? pwq_dec_nr_in_flight+0x230/0x230\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? rwlock_bug.part.0+0x90/0x90\nFeb 21 09:47:35 c-237-177-40-045 kernel:  worker_thread+0x59d/0xec0\nFeb 21 09:47:35 c-237-177-40-045 kernel:  ? __kthread_parkme+0xd9/0x1d0"
          }
        ],
        "id": "CVE-2023-54074",
        "lastModified": "2026-08-04T10:19:27.630",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
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              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          },
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          }
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
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    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-14T18:43:30+00:00",
      "cve": "CVE-2023-54074",
      "id": "CVE-2023-54074",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "120",
      "product_status:known_affected": "138",
      "product_status:known_not_affected": "104",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service in mlx5e due to incorrect encap attribute handling",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54074.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T02:04:05Z",
      "cve": "CVE-2023-54074",
      "id": "CVE-2023-54074",
      "initial_release_date": "2025-12-25T00:56:15Z",
      "product_status:known_affected": "374",
      "product_status:known_not_affected": "493",
      "product_status:recommended": "136",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-54074",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-54074.json",
      "version": "22"
    }
  }
}

WID-SEC-W-2025-2929

Vulnerability from csaf_certbund - Published: 2025-12-28 23:00 - Updated: 2026-06-04 22:00

Summary

Linux Kernel: Mehrere Schwachstellen

Severity

Hoch

Scope

207 vulnerabilities in this advisory, including CVE-2023-54074.

CVE-2023-54074

Known affected: 9 products

Open the full advisory

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.

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.

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.

Action not permitted

CVE-2023-54074 (GCVE-0-2023-54074)

WID-SEC-W-2025-2929

Tags

Sightings

Nomenclature

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