CVE-2024-36904 (GCVE-0-2024-36904)
Vulnerability from cvelistv5
Published
2024-05-30 15:29
Modified
2025-05-04 09:11
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tcp: Use refcount_inc_not_zero() in tcp_twsk_unique(). Anderson Nascimento reported a use-after-free splat in tcp_twsk_unique() with nice analysis. Since commit ec94c2696f0b ("tcp/dccp: avoid one atomic operation for timewait hashdance"), inet_twsk_hashdance() sets TIME-WAIT socket's sk_refcnt after putting it into ehash and releasing the bucket lock. Thus, there is a small race window where other threads could try to reuse the port during connect() and call sock_hold() in tcp_twsk_unique() for the TIME-WAIT socket with zero refcnt. If that happens, the refcnt taken by tcp_twsk_unique() is overwritten and sock_put() will cause underflow, triggering a real use-after-free somewhere else. To avoid the use-after-free, we need to use refcount_inc_not_zero() in tcp_twsk_unique() and give up on reusing the port if it returns false. [0]: refcount_t: addition on 0; use-after-free. WARNING: CPU: 0 PID: 1039313 at lib/refcount.c:25 refcount_warn_saturate+0xe5/0x110 CPU: 0 PID: 1039313 Comm: trigger Not tainted 6.8.6-200.fc39.x86_64 #1 Hardware name: VMware, Inc. VMware20,1/440BX Desktop Reference Platform, BIOS VMW201.00V.21805430.B64.2305221830 05/22/2023 RIP: 0010:refcount_warn_saturate+0xe5/0x110 Code: 42 8e ff 0f 0b c3 cc cc cc cc 80 3d aa 13 ea 01 00 0f 85 5e ff ff ff 48 c7 c7 f8 8e b7 82 c6 05 96 13 ea 01 01 e8 7b 42 8e ff <0f> 0b c3 cc cc cc cc 48 c7 c7 50 8f b7 82 c6 05 7a 13 ea 01 01 e8 RSP: 0018:ffffc90006b43b60 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff888009bb3ef0 RCX: 0000000000000027 RDX: ffff88807be218c8 RSI: 0000000000000001 RDI: ffff88807be218c0 RBP: 0000000000069d70 R08: 0000000000000000 R09: ffffc90006b439f0 R10: ffffc90006b439e8 R11: 0000000000000003 R12: ffff8880029ede84 R13: 0000000000004e20 R14: ffffffff84356dc0 R15: ffff888009bb3ef0 FS: 00007f62c10926c0(0000) GS:ffff88807be00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020ccb000 CR3: 000000004628c005 CR4: 0000000000f70ef0 PKRU: 55555554 Call Trace: <TASK> ? refcount_warn_saturate+0xe5/0x110 ? __warn+0x81/0x130 ? refcount_warn_saturate+0xe5/0x110 ? report_bug+0x171/0x1a0 ? refcount_warn_saturate+0xe5/0x110 ? handle_bug+0x3c/0x80 ? exc_invalid_op+0x17/0x70 ? asm_exc_invalid_op+0x1a/0x20 ? refcount_warn_saturate+0xe5/0x110 tcp_twsk_unique+0x186/0x190 __inet_check_established+0x176/0x2d0 __inet_hash_connect+0x74/0x7d0 ? __pfx___inet_check_established+0x10/0x10 tcp_v4_connect+0x278/0x530 __inet_stream_connect+0x10f/0x3d0 inet_stream_connect+0x3a/0x60 __sys_connect+0xa8/0xd0 __x64_sys_connect+0x18/0x20 do_syscall_64+0x83/0x170 entry_SYSCALL_64_after_hwframe+0x78/0x80 RIP: 0033:0x7f62c11a885d Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a3 45 0c 00 f7 d8 64 89 01 48 RSP: 002b:00007f62c1091e58 EFLAGS: 00000296 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000020ccb004 RCX: 00007f62c11a885d RDX: 0000000000000010 RSI: 0000000020ccb000 RDI: 0000000000000003 RBP: 00007f62c1091e90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 00007f62c10926c0 R13: ffffffffffffff88 R14: 0000000000000000 R15: 00007ffe237885b0 </TASK>
References
Impacted products
Vendor Product Version
Linux Linux Version: ec94c2696f0bcd5ae92a553244e4ac30d2171a2d
Version: ec94c2696f0bcd5ae92a553244e4ac30d2171a2d
Version: ec94c2696f0bcd5ae92a553244e4ac30d2171a2d
Version: ec94c2696f0bcd5ae92a553244e4ac30d2171a2d
Version: ec94c2696f0bcd5ae92a553244e4ac30d2171a2d
Version: ec94c2696f0bcd5ae92a553244e4ac30d2171a2d
Version: ec94c2696f0bcd5ae92a553244e4ac30d2171a2d
Version: ec94c2696f0bcd5ae92a553244e4ac30d2171a2d
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Use refcount_inc_not_zero() in tcp_twsk_unique().\n\nAnderson Nascimento reported a use-after-free splat in tcp_twsk_unique()\nwith nice analysis.\n\nSince commit ec94c2696f0b (\"tcp/dccp: avoid one atomic operation for\ntimewait hashdance\"), inet_twsk_hashdance() sets TIME-WAIT socket\u0027s\nsk_refcnt after putting it into ehash and releasing the bucket lock.\n\nThus, there is a small race window where other threads could try to\nreuse the port during connect() and call sock_hold() in tcp_twsk_unique()\nfor the TIME-WAIT socket with zero refcnt.\n\nIf that happens, the refcnt taken by tcp_twsk_unique() is overwritten\nand sock_put() will cause underflow, triggering a real use-after-free\nsomewhere else.\n\nTo avoid the use-after-free, we need to use refcount_inc_not_zero() in\ntcp_twsk_unique() and give up on reusing the port if it returns false.\n\n[0]:\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 0 PID: 1039313 at lib/refcount.c:25 refcount_warn_saturate+0xe5/0x110\nCPU: 0 PID: 1039313 Comm: trigger Not tainted 6.8.6-200.fc39.x86_64 #1\nHardware name: VMware, Inc. VMware20,1/440BX Desktop Reference Platform, BIOS VMW201.00V.21805430.B64.2305221830 05/22/2023\nRIP: 0010:refcount_warn_saturate+0xe5/0x110\nCode: 42 8e ff 0f 0b c3 cc cc cc cc 80 3d aa 13 ea 01 00 0f 85 5e ff ff ff 48 c7 c7 f8 8e b7 82 c6 05 96 13 ea 01 01 e8 7b 42 8e ff \u003c0f\u003e 0b c3 cc cc cc cc 48 c7 c7 50 8f b7 82 c6 05 7a 13 ea 01 01 e8\nRSP: 0018:ffffc90006b43b60 EFLAGS: 00010282\nRAX: 0000000000000000 RBX: ffff888009bb3ef0 RCX: 0000000000000027\nRDX: ffff88807be218c8 RSI: 0000000000000001 RDI: ffff88807be218c0\nRBP: 0000000000069d70 R08: 0000000000000000 R09: ffffc90006b439f0\nR10: ffffc90006b439e8 R11: 0000000000000003 R12: ffff8880029ede84\nR13: 0000000000004e20 R14: ffffffff84356dc0 R15: ffff888009bb3ef0\nFS:  00007f62c10926c0(0000) GS:ffff88807be00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000020ccb000 CR3: 000000004628c005 CR4: 0000000000f70ef0\nPKRU: 55555554\nCall Trace:\n \u003cTASK\u003e\n ? refcount_warn_saturate+0xe5/0x110\n ? __warn+0x81/0x130\n ? refcount_warn_saturate+0xe5/0x110\n ? report_bug+0x171/0x1a0\n ? refcount_warn_saturate+0xe5/0x110\n ? handle_bug+0x3c/0x80\n ? exc_invalid_op+0x17/0x70\n ? asm_exc_invalid_op+0x1a/0x20\n ? refcount_warn_saturate+0xe5/0x110\n tcp_twsk_unique+0x186/0x190\n __inet_check_established+0x176/0x2d0\n __inet_hash_connect+0x74/0x7d0\n ? __pfx___inet_check_established+0x10/0x10\n tcp_v4_connect+0x278/0x530\n __inet_stream_connect+0x10f/0x3d0\n inet_stream_connect+0x3a/0x60\n __sys_connect+0xa8/0xd0\n __x64_sys_connect+0x18/0x20\n do_syscall_64+0x83/0x170\n entry_SYSCALL_64_after_hwframe+0x78/0x80\nRIP: 0033:0x7f62c11a885d\nCode: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d a3 45 0c 00 f7 d8 64 89 01 48\nRSP: 002b:00007f62c1091e58 EFLAGS: 00000296 ORIG_RAX: 000000000000002a\nRAX: ffffffffffffffda RBX: 0000000020ccb004 RCX: 00007f62c11a885d\nRDX: 0000000000000010 RSI: 0000000020ccb000 RDI: 0000000000000003\nRBP: 00007f62c1091e90 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000296 R12: 00007f62c10926c0\nR13: ffffffffffffff88 R14: 0000000000000000 R15: 00007ffe237885b0\n \u003c/TASK\u003e"
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\"CISA-ADP\", \"dateUpdated\": \"2024-06-12T19:20:34.515Z\"}}], \"cna\": {\"title\": \"tcp: Use refcount_inc_not_zero() in tcp_twsk_unique().\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"ec94c2696f0bcd5ae92a553244e4ac30d2171a2d\", \"lessThan\": \"84546cc1aeeb4df3e444b18a4293c9823f974be9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ec94c2696f0bcd5ae92a553244e4ac30d2171a2d\", \"lessThan\": \"1796ca9c6f5bd50554214053af5f47d112818ee3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ec94c2696f0bcd5ae92a553244e4ac30d2171a2d\", \"lessThan\": \"1d9cf07810c30ef7948879567d10fd1f01121d34\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ec94c2696f0bcd5ae92a553244e4ac30d2171a2d\", \"lessThan\": \"27b0284d8be182a81feb65581ab6a724dfd596e8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ec94c2696f0bcd5ae92a553244e4ac30d2171a2d\", \"lessThan\": \"13ed7cdf079686ccd3618335205700c03f6fb446\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ec94c2696f0bcd5ae92a553244e4ac30d2171a2d\", \"lessThan\": \"6e48faad92be13166184d21506e4e54c79c13adc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ec94c2696f0bcd5ae92a553244e4ac30d2171a2d\", \"lessThan\": \"517e32ea0a8c72202d0d8aa8df50a7cd3d6fdefc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ec94c2696f0bcd5ae92a553244e4ac30d2171a2d\", \"lessThan\": \"f2db7230f73a80dbb179deab78f88a7947f0ab7e\", \"versionType\": \"git\"}], \"programFiles\": [\"net/ipv4/tcp_ipv4.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.16\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.16\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.314\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.276\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.217\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.159\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.91\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.31\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/ipv4/tcp_ipv4.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/84546cc1aeeb4df3e444b18a4293c9823f974be9\"}, {\"url\": \"https://git.kernel.org/stable/c/1796ca9c6f5bd50554214053af5f47d112818ee3\"}, {\"url\": \"https://git.kernel.org/stable/c/1d9cf07810c30ef7948879567d10fd1f01121d34\"}, {\"url\": \"https://git.kernel.org/stable/c/27b0284d8be182a81feb65581ab6a724dfd596e8\"}, {\"url\": \"https://git.kernel.org/stable/c/13ed7cdf079686ccd3618335205700c03f6fb446\"}, {\"url\": \"https://git.kernel.org/stable/c/6e48faad92be13166184d21506e4e54c79c13adc\"}, {\"url\": \"https://git.kernel.org/stable/c/517e32ea0a8c72202d0d8aa8df50a7cd3d6fdefc\"}, {\"url\": \"https://git.kernel.org/stable/c/f2db7230f73a80dbb179deab78f88a7947f0ab7e\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntcp: Use refcount_inc_not_zero() in tcp_twsk_unique().\\n\\nAnderson Nascimento reported a use-after-free splat in tcp_twsk_unique()\\nwith nice analysis.\\n\\nSince commit ec94c2696f0b (\\\"tcp/dccp: avoid one atomic operation for\\ntimewait hashdance\\\"), inet_twsk_hashdance() sets TIME-WAIT socket\u0027s\\nsk_refcnt after putting it into ehash and releasing the bucket lock.\\n\\nThus, there is a small race window where other threads could try to\\nreuse the port during connect() and call sock_hold() in tcp_twsk_unique()\\nfor the TIME-WAIT socket with zero refcnt.\\n\\nIf that happens, the refcnt taken by tcp_twsk_unique() is overwritten\\nand sock_put() will cause underflow, triggering a real use-after-free\\nsomewhere else.\\n\\nTo avoid the use-after-free, we need to use refcount_inc_not_zero() in\\ntcp_twsk_unique() and give up on reusing the port if it returns false.\\n\\n[0]:\\nrefcount_t: addition on 0; use-after-free.\\nWARNING: CPU: 0 PID: 1039313 at lib/refcount.c:25 refcount_warn_saturate+0xe5/0x110\\nCPU: 0 PID: 1039313 Comm: trigger Not tainted 6.8.6-200.fc39.x86_64 #1\\nHardware name: VMware, Inc. VMware20,1/440BX Desktop Reference Platform, BIOS VMW201.00V.21805430.B64.2305221830 05/22/2023\\nRIP: 0010:refcount_warn_saturate+0xe5/0x110\\nCode: 42 8e ff 0f 0b c3 cc cc cc cc 80 3d aa 13 ea 01 00 0f 85 5e ff ff ff 48 c7 c7 f8 8e b7 82 c6 05 96 13 ea 01 01 e8 7b 42 8e ff \u003c0f\u003e 0b c3 cc cc cc cc 48 c7 c7 50 8f b7 82 c6 05 7a 13 ea 01 01 e8\\nRSP: 0018:ffffc90006b43b60 EFLAGS: 00010282\\nRAX: 0000000000000000 RBX: ffff888009bb3ef0 RCX: 0000000000000027\\nRDX: ffff88807be218c8 RSI: 0000000000000001 RDI: ffff88807be218c0\\nRBP: 0000000000069d70 R08: 0000000000000000 R09: ffffc90006b439f0\\nR10: ffffc90006b439e8 R11: 0000000000000003 R12: ffff8880029ede84\\nR13: 0000000000004e20 R14: ffffffff84356dc0 R15: ffff888009bb3ef0\\nFS:  00007f62c10926c0(0000) GS:ffff88807be00000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 0000000020ccb000 CR3: 000000004628c005 CR4: 0000000000f70ef0\\nPKRU: 55555554\\nCall Trace:\\n \u003cTASK\u003e\\n ? refcount_warn_saturate+0xe5/0x110\\n ? __warn+0x81/0x130\\n ? refcount_warn_saturate+0xe5/0x110\\n ? report_bug+0x171/0x1a0\\n ? refcount_warn_saturate+0xe5/0x110\\n ? handle_bug+0x3c/0x80\\n ? exc_invalid_op+0x17/0x70\\n ? asm_exc_invalid_op+0x1a/0x20\\n ? refcount_warn_saturate+0xe5/0x110\\n tcp_twsk_unique+0x186/0x190\\n __inet_check_established+0x176/0x2d0\\n __inet_hash_connect+0x74/0x7d0\\n ? __pfx___inet_check_established+0x10/0x10\\n tcp_v4_connect+0x278/0x530\\n __inet_stream_connect+0x10f/0x3d0\\n inet_stream_connect+0x3a/0x60\\n __sys_connect+0xa8/0xd0\\n __x64_sys_connect+0x18/0x20\\n do_syscall_64+0x83/0x170\\n entry_SYSCALL_64_after_hwframe+0x78/0x80\\nRIP: 0033:0x7f62c11a885d\\nCode: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d a3 45 0c 00 f7 d8 64 89 01 48\\nRSP: 002b:00007f62c1091e58 EFLAGS: 00000296 ORIG_RAX: 000000000000002a\\nRAX: ffffffffffffffda RBX: 0000000020ccb004 RCX: 00007f62c11a885d\\nRDX: 0000000000000010 RSI: 0000000020ccb000 RDI: 0000000000000003\\nRBP: 00007f62c1091e90 R08: 0000000000000000 R09: 0000000000000000\\nR10: 0000000000000000 R11: 0000000000000296 R12: 00007f62c10926c0\\nR13: ffffffffffffff88 R14: 0000000000000000 R15: 00007ffe237885b0\\n \u003c/TASK\u003e\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.314\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.276\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.217\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.159\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.91\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.31\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.10\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"4.16\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:11:46.007Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-36904\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T09:11:46.007Z\", \"dateReserved\": \"2024-05-30T15:25:07.067Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-30T15:29:05.457Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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