cve-2024-56558
Vulnerability from cvelistv5
Published
2024-12-27 14:23
Modified
2025-02-11 15:45
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: nfsd: make sure exp active before svc_export_show The function `e_show` was called with protection from RCU. This only ensures that `exp` will not be freed. Therefore, the reference count for `exp` can drop to zero, which will trigger a refcount use-after-free warning when `exp_get` is called. To resolve this issue, use `cache_get_rcu` to ensure that `exp` remains active. ------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 3 PID: 819 at lib/refcount.c:25 refcount_warn_saturate+0xb1/0x120 CPU: 3 UID: 0 PID: 819 Comm: cat Not tainted 6.12.0-rc3+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014 RIP: 0010:refcount_warn_saturate+0xb1/0x120 ... Call Trace: <TASK> e_show+0x20b/0x230 [nfsd] seq_read_iter+0x589/0x770 seq_read+0x1e5/0x270 vfs_read+0x125/0x530 ksys_read+0xc1/0x160 do_syscall_64+0x5f/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1cecfdbc6bfc89c516d286884c7f29267b95de2b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6cefcadd34e3c71c81ea64b899a0daa86314a51a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7365d1f8de63cffdbbaa2287ce0205438e1a922f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d8f7816bebcd2e7400bb4d786eccb8f33c9f9ec
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7fd29d284b55c2274f7a748e6c5f25b4758b8da5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/be8f982c369c965faffa198b46060f8853e0f1f0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e2fa0d0e327279a8defb87b263cd0bf288fd9261
Impacted products
Vendor Product Version
Linux Linux Version: bf18f163e89c52e09c96534db45c4274273a0b34
Version: bf18f163e89c52e09c96534db45c4274273a0b34
Version: bf18f163e89c52e09c96534db45c4274273a0b34
Version: bf18f163e89c52e09c96534db45c4274273a0b34
Version: bf18f163e89c52e09c96534db45c4274273a0b34
Version: bf18f163e89c52e09c96534db45c4274273a0b34
Version: bf18f163e89c52e09c96534db45c4274273a0b34
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   Linux Linux Version: 3.17
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-56558",
    "datePublished": "2024-12-27T14:23:03.902Z",
    "dateReserved": "2024-12-27T14:03:05.992Z",
    "dateUpdated": "2025-02-11T15:45:24.949Z",
    "state": "PUBLISHED"
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      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-56558\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-02-11T15:42:49.247633Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-02-11T15:42:50.585Z\"}}], \"cna\": {\"title\": \"nfsd: make sure exp active before svc_export_show\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"bf18f163e89c52e09c96534db45c4274273a0b34\", \"lessThan\": \"e2fa0d0e327279a8defb87b263cd0bf288fd9261\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bf18f163e89c52e09c96534db45c4274273a0b34\", \"lessThan\": \"7fd29d284b55c2274f7a748e6c5f25b4758b8da5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bf18f163e89c52e09c96534db45c4274273a0b34\", \"lessThan\": \"6cefcadd34e3c71c81ea64b899a0daa86314a51a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bf18f163e89c52e09c96534db45c4274273a0b34\", \"lessThan\": \"7d8f7816bebcd2e7400bb4d786eccb8f33c9f9ec\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bf18f163e89c52e09c96534db45c4274273a0b34\", \"lessThan\": \"1cecfdbc6bfc89c516d286884c7f29267b95de2b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bf18f163e89c52e09c96534db45c4274273a0b34\", \"lessThan\": \"7365d1f8de63cffdbbaa2287ce0205438e1a922f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bf18f163e89c52e09c96534db45c4274273a0b34\", \"lessThan\": \"be8f982c369c965faffa198b46060f8853e0f1f0\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/nfsd/export.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.17\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.17\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.287\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.231\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.174\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.120\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.64\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/nfsd/export.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/e2fa0d0e327279a8defb87b263cd0bf288fd9261\"}, {\"url\": \"https://git.kernel.org/stable/c/7fd29d284b55c2274f7a748e6c5f25b4758b8da5\"}, {\"url\": \"https://git.kernel.org/stable/c/6cefcadd34e3c71c81ea64b899a0daa86314a51a\"}, {\"url\": \"https://git.kernel.org/stable/c/7d8f7816bebcd2e7400bb4d786eccb8f33c9f9ec\"}, {\"url\": \"https://git.kernel.org/stable/c/1cecfdbc6bfc89c516d286884c7f29267b95de2b\"}, {\"url\": \"https://git.kernel.org/stable/c/7365d1f8de63cffdbbaa2287ce0205438e1a922f\"}, {\"url\": \"https://git.kernel.org/stable/c/be8f982c369c965faffa198b46060f8853e0f1f0\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnfsd: make sure exp active before svc_export_show\\n\\nThe function `e_show` was called with protection from RCU. This only\\nensures that `exp` will not be freed. Therefore, the reference count for\\n`exp` can drop to zero, which will trigger a refcount use-after-free\\nwarning when `exp_get` is called. To resolve this issue, use\\n`cache_get_rcu` to ensure that `exp` remains active.\\n\\n------------[ cut here ]------------\\nrefcount_t: addition on 0; use-after-free.\\nWARNING: CPU: 3 PID: 819 at lib/refcount.c:25\\nrefcount_warn_saturate+0xb1/0x120\\nCPU: 3 UID: 0 PID: 819 Comm: cat Not tainted 6.12.0-rc3+ #1\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\\n1.16.1-2.fc37 04/01/2014\\nRIP: 0010:refcount_warn_saturate+0xb1/0x120\\n...\\nCall Trace:\\n \u003cTASK\u003e\\n e_show+0x20b/0x230 [nfsd]\\n seq_read_iter+0x589/0x770\\n seq_read+0x1e5/0x270\\n vfs_read+0x125/0x530\\n ksys_read+0xc1/0x160\\n do_syscall_64+0x5f/0x170\\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-01-20T06:23:03.293Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-56558\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-02-11T15:45:24.949Z\", \"dateReserved\": \"2024-12-27T14:03:05.992Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-12-27T14:23:03.902Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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