{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2024-26864","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-19T14:20:24.184Z","datePublished":"2024-04-17T10:27:26.884Z","dateUpdated":"2025-05-04T08:58:16.170Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T08:58:16.170Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Fix refcnt handling in __inet_hash_connect().\n\nsyzbot reported a warning in sk_nulls_del_node_init_rcu().\n\nThe commit 66b60b0c8c4a (\"dccp/tcp: Unhash sk from ehash for tb2 alloc\nfailure after check_estalblished().\") tried to fix an issue that an\nunconnected socket occupies an ehash entry when bhash2 allocation fails.\n\nIn such a case, we need to revert changes done by check_established(),\nwhich does not hold refcnt when inserting socket into ehash.\n\nSo, to revert the change, we need to __sk_nulls_add_node_rcu() instead\nof sk_nulls_add_node_rcu().\n\nOtherwise, sock_put() will cause refcnt underflow and leak the socket.\n\n[0]:\nWARNING: CPU: 0 PID: 23948 at include/net/sock.h:799 sk_nulls_del_node_init_rcu+0x166/0x1a0 include/net/sock.h:799\nModules linked in:\nCPU: 0 PID: 23948 Comm: syz-executor.2 Not tainted 6.8.0-rc6-syzkaller-00159-gc055fc00c07b #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024\nRIP: 0010:sk_nulls_del_node_init_rcu+0x166/0x1a0 include/net/sock.h:799\nCode: e8 7f 71 c6 f7 83 fb 02 7c 25 e8 35 6d c6 f7 4d 85 f6 0f 95 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 1b 6d c6 f7 90 <0f> 0b 90 eb b2 e8 10 6d c6 f7 4c 89 e7 be 04 00 00 00 e8 63 e7 d2\nRSP: 0018:ffffc900032d7848 EFLAGS: 00010246\nRAX: ffffffff89cd0035 RBX: 0000000000000001 RCX: 0000000000040000\nRDX: ffffc90004de1000 RSI: 000000000003ffff RDI: 0000000000040000\nRBP: 1ffff1100439ac26 R08: ffffffff89ccffe3 R09: 1ffff1100439ac28\nR10: dffffc0000000000 R11: ffffed100439ac29 R12: ffff888021cd6140\nR13: dffffc0000000000 R14: ffff88802a9bf5c0 R15: ffff888021cd6130\nFS:  00007f3b823f16c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f3b823f0ff8 CR3: 000000004674a000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n __inet_hash_connect+0x140f/0x20b0 net/ipv4/inet_hashtables.c:1139\n dccp_v6_connect+0xcb9/0x1480 net/dccp/ipv6.c:956\n __inet_stream_connect+0x262/0xf30 net/ipv4/af_inet.c:678\n inet_stream_connect+0x65/0xa0 net/ipv4/af_inet.c:749\n __sys_connect_file net/socket.c:2048 [inline]\n __sys_connect+0x2df/0x310 net/socket.c:2065\n __do_sys_connect net/socket.c:2075 [inline]\n __se_sys_connect net/socket.c:2072 [inline]\n __x64_sys_connect+0x7a/0x90 net/socket.c:2072\n do_syscall_64+0xf9/0x240\n entry_SYSCALL_64_after_hwframe+0x6f/0x77\nRIP: 0033:0x7f3b8167dda9\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f3b823f10c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a\nRAX: ffffffffffffffda RBX: 00007f3b817abf80 RCX: 00007f3b8167dda9\nRDX: 000000000000001c RSI: 0000000020000040 RDI: 0000000000000003\nRBP: 00007f3b823f1120 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001\nR13: 000000000000000b R14: 00007f3b817abf80 R15: 00007ffd3beb57b8\n </TASK>"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/inet_hashtables.c"],"versions":[{"version":"729bc77af438a6e67914c97f6f3d3af8f72c0131","lessThan":"86d9b040421bbd26425f5a3edc226f57ecdecbfe","status":"affected","versionType":"git"},{"version":"334a8348b2df26526f3298848ad6864285592caf","lessThan":"856baaa100cd288d3685eedae9a129c996e7e755","status":"affected","versionType":"git"},{"version":"f8c4a6b850882bc47aaa864b720c7a2ee3102f39","lessThan":"1b20e61d36f490319d3fbdedd410155232ab5190","status":"affected","versionType":"git"},{"version":"66b60b0c8c4a163b022a9f0ad6769b0fd3dc662f","lessThan":"ad105cde6b261b8b05ec872fe7d1987417d7fe5a","status":"affected","versionType":"git"},{"version":"66b60b0c8c4a163b022a9f0ad6769b0fd3dc662f","lessThan":"04d9d1fc428ac9f581d55118d67e0cb546701feb","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/inet_hashtables.c"],"versions":[{"version":"6.8","status":"affected"},{"version":"0","lessThan":"6.8","status":"unaffected","versionType":"semver"},{"version":"6.1.83","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.23","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.7.11","lessThanOrEqual":"6.7.*","status":"unaffected","versionType":"semver"},{"version":"6.8.2","lessThanOrEqual":"6.8.*","status":"unaffected","versionType":"semver"},{"version":"6.9","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.80","versionEndExcluding":"6.1.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.19","versionEndExcluding":"6.6.23"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7.7","versionEndExcluding":"6.7.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.8.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.9"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/86d9b040421bbd26425f5a3edc226f57ecdecbfe"},{"url":"https://git.kernel.org/stable/c/856baaa100cd288d3685eedae9a129c996e7e755"},{"url":"https://git.kernel.org/stable/c/1b20e61d36f490319d3fbdedd410155232ab5190"},{"url":"https://git.kernel.org/stable/c/ad105cde6b261b8b05ec872fe7d1987417d7fe5a"},{"url":"https://git.kernel.org/stable/c/04d9d1fc428ac9f581d55118d67e0cb546701feb"}],"title":"tcp: Fix refcnt handling in __inet_hash_connect().","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.9,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"HIGH","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2024-26864","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-05-13T18:32:50.425908Z"}}}],"affected":[{"cpes":["cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*"],"vendor":"linux","product":"linux_kernel","versions":[{"status":"affected","version":"6.8"}],"defaultStatus":"unknown"},{"cpes":["cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*"],"vendor":"linux","product":"linux_kernel","versions":[{"status":"affected","version":"6.8"}],"defaultStatus":"unknown"},{"cpes":["cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"],"vendor":"linux","product":"linux_kernel","versions":[{"status":"affected","version":"729bc77af438","lessThan":"86d9b040421b","versionType":"custom"}],"defaultStatus":"unknown"}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-200","description":"CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"}]}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-04T17:48:34.612Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T00:21:04.155Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/86d9b040421bbd26425f5a3edc226f57ecdecbfe","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/856baaa100cd288d3685eedae9a129c996e7e755","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/1b20e61d36f490319d3fbdedd410155232ab5190","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/ad105cde6b261b8b05ec872fe7d1987417d7fe5a","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/04d9d1fc428ac9f581d55118d67e0cb546701feb","tags":["x_transferred"]}]}]}}