{"id":"CVE-2024-40980","revision":null,"records":[{"revision":"42026f5450f649c68e6846cd5d46e655","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-40980","aliases":[],"title":"drop_monitor: replace spin_lock by raw_spin_lock","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrop_monitor: replace spin_lock by raw_spin_lock\n\ntrace_drop_common() is called with preemption disabled, and it acquires\na spin_lock. This is problematic for RT kernels because spin_locks are\nsleeping locks in this configuration, which causes the following splat:\n\nBUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48\nin_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 449, name: rcuc/47\npreempt_count: 1, expected: 0\nRCU nest depth: 2, expected: 2\n5 locks held by rcuc/47/449:\n #0: ff1100086ec30a60 ((softirq_ctrl.lock)){+.+.}-{2:2}, at: __local_bh_disable_ip+0x105/0x210\n #1: ffffffffb394a280 (rcu_read_lock){....}-{1:2}, at: rt_spin_lock+0xbf/0x130\n #2: ffffffffb394a280 (rcu_read_lock){....}-{1:2}, at: __local_bh_disable_ip+0x11c/0x210\n #3: ffffffffb394a160 (rcu_callback){....}-{0:0}, at: rcu_do_batch+0x360/0xc70\n #4: ff1100086ee07520 (&data->lock){+.+.}-{2:2}, at: trace_drop_common.constprop.0+0xb5/0x290\nirq event stamp: 139909\nhardirqs last enabled at (139908): [] _raw_spin_unlock_irqrestore+0x63/0x80\nhardirqs last disabled at (139909): [] trace_drop_common.constprop.0+0x26d/0x290\nsoftirqs last enabled at (139892): [] __local_bh_enable_ip+0x103/0x170\nsoftirqs last disabled at (139898): [] rcu_cpu_kthread+0x93/0x1f0\nPreemption disabled at:\n[] rt_mutex_slowunlock+0xab/0x2e0\nCPU: 47 PID: 449 Comm: rcuc/47 Not tainted 6.9.0-rc2-rt1+ #7\nHardware name: Dell Inc. PowerEdge R650/0Y2G81, BIOS 1.6.5 04/15/2022\nCall Trace:\n \n dump_stack_lvl+0x8c/0xd0\n dump_stack+0x14/0x20\n __might_resched+0x21e/0x2f0\n rt_spin_lock+0x5e/0x130\n ? trace_drop_common.constprop.0+0xb5/0x290\n ? skb_queue_purge_reason.part.0+0x1bf/0x230\n trace_drop_common.constprop.0+0xb5/0x290\n ? preempt_count_sub+0x1c/0xd0\n ? _raw_spin_unlock_irqrestore+0x4a/0x80\n ? __pfx_trace_drop_common.constprop.0+0x10/0x10\n ? rt_mutex_slowunlock+0x26a/0x2e0\n ? skb_queue_purge_reason.part.0+0x1bf/0x230\n ? __pfx_rt_mutex_slowunlock+0x10/0x10\n ? skb_queue_purge_reason.part.0+0x1bf/0x230\n trace_kfree_skb_hit+0x15/0x20\n trace_kfree_skb+0xe9/0x150\n kfree_skb_reason+0x7b/0x110\n skb_queue_purge_reason.part.0+0x1bf/0x230\n ? __pfx_skb_queue_purge_reason.part.0+0x10/0x10\n ? mark_lock.part.0+0x8a/0x520\n...\n\ntrace_drop_common() also disables interrupts, but this is a minor issue\nbecause we could easily replace it with a local_lock.\n\nReplace the spin_lock with raw_spin_lock to avoid sleeping in atomic\ncontext.","state":0,"publishedAt":"2024-07-12T12:32:15.569+00:00","modifiedAt":"2026-10-15T00:46:31.441+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/core/drop_monitor.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4ea7e38696c7e798c47ebbecadfd392f23f814f9\",\n \"lessThan\": \"594e47957f3fe034645e6885393ce96c12286334\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4ea7e38696c7e798c47ebbecadfd392f23f814f9\",\n \"lessThan\": \"96941f29ebcc1e9cbf570dc903f30374909562f5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4ea7e38696c7e798c47ebbecadfd392f23f814f9\",\n \"lessThan\": \"b3722fb69468693555f531cddda5c30444726dac\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4ea7e38696c7e798c47ebbecadfd392f23f814f9\",\n \"lessThan\": \"f251ccef1d864790e5253386e95544420b7cd8f3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4ea7e38696c7e798c47ebbecadfd392f23f814f9\",\n \"lessThan\": \"76ce2f9125244e1708d29c1d3f9d1d50b347bda0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4ea7e38696c7e798c47ebbecadfd392f23f814f9\",\n \"lessThan\": \"07ea878684dfb78a9d4f564c39d07e855a9e242e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4ea7e38696c7e798c47ebbecadfd392f23f814f9\",\n \"lessThan\": \"f1e197a665c2148ebc25fe09c53689e60afea195\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/core/drop_monitor.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.31\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.31\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.279\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.221\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.162\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.96\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.36\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.9.7\",\n \"lessThanOrEqual\": \"6.9.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.10\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/594e47957f3fe034645e6885393ce96c12286334","https://git.kernel.org/stable/c/96941f29ebcc1e9cbf570dc903f30374909562f5","https://git.kernel.org/stable/c/b3722fb69468693555f531cddda5c30444726dac","https://git.kernel.org/stable/c/f251ccef1d864790e5253386e95544420b7cd8f3","https://git.kernel.org/stable/c/76ce2f9125244e1708d29c1d3f9d1d50b347bda0","https://git.kernel.org/stable/c/07ea878684dfb78a9d4f564c39d07e855a9e242e","https://git.kernel.org/stable/c/f1e197a665c2148ebc25fe09c53689e60afea195"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-40980","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-40980","identifiers":["CVE-2024-40980"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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