cve-2021-47259
Vulnerability from cvelistv5
Published
2024-05-21 14:19
Modified
2024-12-19 07:38
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: NFS: Fix use-after-free in nfs4_init_client() KASAN reports a use-after-free when attempting to mount two different exports through two different NICs that belong to the same server. Olga was able to hit this with kernels starting somewhere between 5.7 and 5.10, but I traced the patch that introduced the clear_bit() call to 4.13. So something must have changed in the refcounting of the clp pointer to make this call to nfs_put_client() the very last one.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3e3c7ebbfac152d08be75c92802a64a1f6471a15
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329ab
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3e3c7ebbfac152d08be75c92802a64a1f6471a15
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766c
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329ab
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897
Impacted products
Vendor Product Version
Linux Linux Version: 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da
Version: 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da
Version: 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da
Version: 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da
Version: 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da
Version: 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da
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   Linux Linux Version: 4.13
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{
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\"git\"}, {\"status\": \"affected\", \"version\": \"8dcbec6d20eb\", \"lessThan\": \"3e3c7ebbfac1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8dcbec6d20eb\", \"lessThan\": \"c3b6cf64dfe4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8dcbec6d20eb\", \"lessThan\": \"72651c6579a2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8dcbec6d20eb\", \"lessThan\": \"476bdb04c501\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/nfs/nfs4client.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.13\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.13\", \"versionType\": \"custom\"}, {\"status\": \"unaffected\", \"version\": \"4.14.237\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.195\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.126\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.44\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.11\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/nfs/nfs4client.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897\"}, {\"url\": \"https://git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766c\"}, {\"url\": \"https://git.kernel.org/stable/c/3e3c7ebbfac152d08be75c92802a64a1f6471a15\"}, {\"url\": \"https://git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7\"}, {\"url\": \"https://git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329ab\"}, {\"url\": \"https://git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577\"}], \"x_generator\": {\"engine\": \"bippy-a5840b7849dd\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nNFS: Fix use-after-free in nfs4_init_client()\\n\\nKASAN reports a use-after-free when attempting to mount two different\\nexports through two different NICs that belong to the same server.\\n\\nOlga was able to hit this with kernels starting somewhere between 5.7\\nand 5.10, but I traced the patch that introduced the clear_bit() call to\\n4.13. So something must have changed in the refcounting of the clp\\npointer to make this call to nfs_put_client() the very last one.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-05-29T05:04:50.303Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2021-47259\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-08-04T05:32:07.994Z\", \"dateReserved\": \"2024-05-21T13:27:52.125Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:19:52.738Z\", \"assignerShortName\": \"Linux\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


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