CVE-2024-38544 (GCVE-0-2024-38544)
Vulnerability from cvelistv5
Published
2024-06-19 13:35
Modified
2026-08-05 11:32
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt In rxe_comp_queue_pkt() an incoming response packet skb is enqueued to the resp_pkts queue and then a decision is made whether to run the completer task inline or schedule it. Finally the skb is dereferenced to bump a 'hw' performance counter. This is wrong because if the completer task is already running in a separate thread it may have already processed the skb and freed it which can cause a seg fault. This has been observed infrequently in testing at high scale. This patch fixes this by changing the order of enqueuing the packet until after the counter is accessed.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0
Version: 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0
Version: 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0
Version: 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0
Version: 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0
Version: 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0
Version: 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0
Version: 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0
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{\"status\": \"unaffected\", \"version\": \"5.10.227\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.168\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.93\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.33\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.12\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/infiniband/sw/rxe/rxe_comp.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c91fb72a2ca6480d8d77262eef52dc5b178463a3\"}, {\"url\": \"https://git.kernel.org/stable/c/de5a059e36657442b5637cc16df5163e435b9cb4\"}, {\"url\": \"https://git.kernel.org/stable/c/e0e14dd35d4242340c7346aac60c7ff8fbf87ffc\"}, {\"url\": \"https://git.kernel.org/stable/c/faa8d0ecf6c9c7c2ace3ca3e552180ada6f75e19\"}, {\"url\": \"https://git.kernel.org/stable/c/21b4c6d4d89030fd4657a8e7c8110fd941049794\"}, {\"url\": \"https://git.kernel.org/stable/c/bbad88f111a1829f366c189aa48e7e58e57553fc\"}, {\"url\": \"https://git.kernel.org/stable/c/30df4bef8b8e183333e9b6e9d4509d552c7da6eb\"}, {\"url\": \"https://git.kernel.org/stable/c/2b23b6097303ed0ba5f4bc036a1c07b6027af5c6\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/rxe: Fix seg fault in rxe_comp_queue_pkt\\n\\nIn rxe_comp_queue_pkt() an incoming response packet skb is enqueued to the\\nresp_pkts queue and then a decision is made whether to run the completer\\ntask inline or schedule it. Finally the skb is dereferenced to bump a \u0027hw\u0027\\nperformance counter. This is wrong because if the completer task is\\nalready running in a separate thread it may have already processed the skb\\nand freed it which can cause a seg fault.  This has been observed\\ninfrequently in testing at high scale.\\n\\nThis patch fixes this by changing the order of enqueuing the packet until\\nafter the counter is accessed.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.285\", \"versionStartIncluding\": \"4.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.227\", \"versionStartIncluding\": \"4.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.168\", \"versionStartIncluding\": \"4.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.93\", \"versionStartIncluding\": \"4.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.33\", \"versionStartIncluding\": \"4.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.12\", \"versionStartIncluding\": \"4.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.3\", \"versionStartIncluding\": \"4.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"4.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:32:41.788Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-38544\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:32:41.788Z\", \"dateReserved\": \"2024-06-18T19:36:34.919Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-06-19T13:35:18.676Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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