{"dataType":"CVE_RECORD","cveMetadata":{"cveId":"CVE-2024-36013","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-17T13:50:33.153Z","datePublished":"2024-05-23T07:03:07.571Z","dateUpdated":"2025-05-04T09:10:30.158Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T09:10:30.158Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix slab-use-after-free in l2cap_connect()\n\nExtend a critical section to prevent chan from early freeing.\nAlso make the l2cap_connect() return type void. Nothing is using the\nreturned value but it is ugly to return a potentially freed pointer.\nMaking it void will help with backports because earlier kernels did use\nthe return value. Now the compile will break for kernels where this\npatch is not a complete fix.\n\nCall stack summary:\n\n[use]\nl2cap_bredr_sig_cmd\n  l2cap_connect\n  ┌ mutex_lock(&conn->chan_lock);\n  │ chan = pchan->ops->new_connection(pchan); <- alloc chan\n  │ __l2cap_chan_add(conn, chan);\n  │   l2cap_chan_hold(chan);\n  │   list_add(&chan->list, &conn->chan_l);   ... (1)\n  └ mutex_unlock(&conn->chan_lock);\n    chan->conf_state              ... (4) <- use after free\n\n[free]\nl2cap_conn_del\n┌ mutex_lock(&conn->chan_lock);\n│ foreach chan in conn->chan_l:            ... (2)\n│   l2cap_chan_put(chan);\n│     l2cap_chan_destroy\n│       kfree(chan)               ... (3) <- chan freed\n└ mutex_unlock(&conn->chan_lock);\n\n==================================================================\nBUG: KASAN: slab-use-after-free in instrument_atomic_read\ninclude/linux/instrumented.h:68 [inline]\nBUG: KASAN: slab-use-after-free in _test_bit\ninclude/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]\nBUG: KASAN: slab-use-after-free in l2cap_connect+0xa67/0x11a0\nnet/bluetooth/l2cap_core.c:4260\nRead of size 8 at addr ffff88810bf040a0 by task kworker/u3:1/311"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/l2cap_core.c"],"versions":[{"version":"73ffa904b78287f6acf8797e040150aa26a4af4a","lessThan":"cfe560c7050bfb37b0d2491bbe7cd8b59e77fdc5","status":"affected","versionType":"git"},{"version":"73ffa904b78287f6acf8797e040150aa26a4af4a","lessThan":"826af9d2f69567c646ff46d10393d47e30ad23c6","status":"affected","versionType":"git"},{"version":"73ffa904b78287f6acf8797e040150aa26a4af4a","lessThan":"4d7b41c0e43995b0e992b9f8903109275744b658","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/bluetooth/l2cap_core.c"],"versions":[{"version":"3.0","status":"affected"},{"version":"0","lessThan":"3.0","status":"unaffected","versionType":"semver"},{"version":"6.6.32","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.8.11","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":"3.0","versionEndExcluding":"6.6.32"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"6.8.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"6.9"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/cfe560c7050bfb37b0d2491bbe7cd8b59e77fdc5"},{"url":"https://git.kernel.org/stable/c/826af9d2f69567c646ff46d10393d47e30ad23c6"},{"url":"https://git.kernel.org/stable/c/4d7b41c0e43995b0e992b9f8903109275744b658"}],"title":"Bluetooth: L2CAP: Fix slab-use-after-free in l2cap_connect()","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":6.8,"attackVector":"ADJACENT_NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"REQUIRED","attackComplexity":"HIGH","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2024-36013","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2024-05-23T16:10:59.613631Z"}}}],"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":"2024-06-04T17:47:42.167Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T03:30:11.584Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/cfe560c7050bfb37b0d2491bbe7cd8b59e77fdc5","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/826af9d2f69567c646ff46d10393d47e30ad23c6","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/4d7b41c0e43995b0e992b9f8903109275744b658","tags":["x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2024/05/30/2","tags":["x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2024/05/30/1","tags":["x_transferred"]}]}]},"dataVersion":"5.1"}