Vulnerability-Lookup

GHSA-MR4J-H79V-VCP9

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-06-01 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

net: strparser: fix skb_head leak in strp_abort_strp()

When the stream parser is aborted, for example after a message assembly timeout, it can still hold a reference to a partially assembled message in strp->skb_head.

That skb is not released in strp_abort_strp(), which leaks the partially assembled message and can be triggered repeatedly to exhaust memory.

Fix this by freeing strp->skb_head and resetting the parser state in the abort path. Leave strp_stop() unchanged so final cleanup still happens in strp_done() after the work and timer have been synchronized.

Severity

7.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46102"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:32Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: strparser: fix skb_head leak in strp_abort_strp()\n\nWhen the stream parser is aborted, for example after a message assembly timeout,\nit can still hold a reference to a partially assembled message in\nstrp-\u003eskb_head.\n\nThat skb is not released in strp_abort_strp(), which leaks the partially\nassembled message and can be triggered repeatedly to exhaust memory.\n\nFix this by freeing strp-\u003eskb_head and resetting the parser state in the\nabort path. Leave strp_stop() unchanged so final cleanup still happens in\nstrp_done() after the work and timer have been synchronized.",
  "id": "GHSA-mr4j-h79v-vcp9",
  "modified": "2026-06-01T18:31:35Z",
  "published": "2026-05-27T15:33:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46102"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/19ca9475f18f991735f98a22e735c43e95e6298d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5327dad2ffe9c1b49881dd6d51ff3c6893847568"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/56082f442023db9be1a5a29d4ee361de4017c0b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a470ed71c906cc8cbad0d74c9942216698911f8b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2e57695ec9ff9d42f23de70f3805199153d007b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6668ce0e78d23eabecef9a6bc4f0f739cb28ad3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9ae00490d474757c0f9c65073de83e6bb1e5a00"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe72340daaf1af588be88056faf98965f39e6032"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-46102 (GCVE-0-2026-46102)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:59 – Updated: 2026-08-05 12:29

Title

net: strparser: fix skb_head leak in strp_abort_strp()

Summary

In the Linux kernel, the following vulnerability has been resolved: net: strparser: fix skb_head leak in strp_abort_strp() When the stream parser is aborted, for example after a message assembly timeout, it can still hold a reference to a partially assembled message in strp->skb_head. That skb is not released in strp_abort_strp(), which leaks the partially assembled message and can be triggered repeatedly to exhaust memory. Fix this by freeing strp->skb_head and resetting the parser state in the abort path. Leave strp_stop() unchanged so final cleanup still happens in strp_done() after the work and timer have been synchronized.

Severity

7.5 (High)


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

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/d6668ce0e78d23eab…
https://git.kernel.org/stable/c/a470ed71c906cc8cb…
https://git.kernel.org/stable/c/c2e57695ec9ff9d42…
https://git.kernel.org/stable/c/e9ae00490d474757c…
https://git.kernel.org/stable/c/5327dad2ffe9c1b49…
https://git.kernel.org/stable/c/19ca9475f18f99173…
https://git.kernel.org/stable/c/56082f442023db9be…
https://git.kernel.org/stable/c/fe72340daaf1af588…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a , < d6668ce0e78d23eabecef9a6bc4f0f739cb28ad3 (git) Affected: 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a , < a470ed71c906cc8cbad0d74c9942216698911f8b (git) Affected: 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a , < c2e57695ec9ff9d42f23de70f3805199153d007b (git) Affected: 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a , < e9ae00490d474757c0f9c65073de83e6bb1e5a00 (git) Affected: 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a , < 5327dad2ffe9c1b49881dd6d51ff3c6893847568 (git) Affected: 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a , < 19ca9475f18f991735f98a22e735c43e95e6298d (git) Affected: 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a , < 56082f442023db9be1a5a29d4ee361de4017c0b7 (git) Affected: 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a , < fe72340daaf1af588be88056faf98965f39e6032 (git)
Linux	Linux	Affected: 4.9 Unaffected: 0 , < 4.9 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.86 , ≤ 6.12.* (semver) Unaffected: 6.18.27 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/strparser/strparser.c"
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              "versionType": "git"
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            },
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              "status": "unaffected",
              "version": "0",
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            {
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              "status": "unaffected",
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            {
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: strparser: fix skb_head leak in strp_abort_strp()\n\nWhen the stream parser is aborted, for example after a message assembly timeout,\nit can still hold a reference to a partially assembled message in\nstrp-\u003eskb_head.\n\nThat skb is not released in strp_abort_strp(), which leaks the partially\nassembled message and can be triggered repeatedly to exhaust memory.\n\nFix this by freeing strp-\u003eskb_head and resetting the parser state in the\nabort path. Leave strp_stop() unchanged so final cleanup still happens in\nstrp_done() after the work and timer have been synchronized."
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              "value": "AV:N - The strparser parses data received from a remote TCP peer (espintcp ESP-in-TCP framing, sockmap framed protocols); the leak is driven by a remote peer sending a partial length-prefixed frame that never completes.\nAC:L - The attacker reliably sends an incomplete framed message and simply lets the message-assembly timer expire; this trigger is fully under the attacker\u0027s control.\nPR:N - The framing parse (length-prefix read) occurs at the stream layer before any authentication of the payload, so a remote peer needs no privileges on the target to send partial frames and trigger the leak.\nUI:N - No victim interaction is required; the leak is triggered solely by the attacker\u0027s network data and the timeout firing.\nS:U - The leaked skb is kernel memory within the same security authority; no security boundary is crossed.\nC:N - The leaked partial-message skb is orphaned, not exposed to the attacker; the bug discloses no information.\nI:N - Nothing is overwritten or modified; the parser is stopped and the dangling pointer is never reused, so there is no integrity impact.\nA:H - Each abort leaks a partial message (up to sk_rcvbuf) and the commit notes it can be triggered repeatedly to exhaust memory, leading to kernel-wide memory exhaustion / OOM denial of service."
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        {
          "url": "https://git.kernel.org/stable/c/fe72340daaf1af588be88056faf98965f39e6032"
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      "title": "net: strparser: fix skb_head leak in strp_abort_strp()",
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    "cveId": "CVE-2026-46102",
    "datePublished": "2026-05-27T12:59:09.526Z",
    "dateReserved": "2026-05-13T15:03:33.097Z",
    "dateUpdated": "2026-08-05T12:29:38.661Z",
    "state": "PUBLISHED"
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}

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.
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GHSA-MR4J-H79V-VCP9

CVE-2026-46102 (GCVE-0-2026-46102)

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