CVE-2025-39914 (GCVE-0-2025-39914)

Vulnerability from cvelistv5 – Published: 2025-10-01 07:44 – Updated: 2026-05-11 21:38
VLAI
Title
tracing: Silence warning when chunk allocation fails in trace_pid_write
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Silence warning when chunk allocation fails in trace_pid_write Syzkaller trigger a fault injection warning: WARNING: CPU: 1 PID: 12326 at tracepoint_add_func+0xbfc/0xeb0 Modules linked in: CPU: 1 UID: 0 PID: 12326 Comm: syz.6.10325 Tainted: G U 6.14.0-rc5-syzkaller #0 Tainted: [U]=USER Hardware name: Google Compute Engine/Google Compute Engine RIP: 0010:tracepoint_add_func+0xbfc/0xeb0 kernel/tracepoint.c:294 Code: 09 fe ff 90 0f 0b 90 0f b6 74 24 43 31 ff 41 bc ea ff ff ff RSP: 0018:ffffc9000414fb48 EFLAGS: 00010283 RAX: 00000000000012a1 RBX: ffffffff8e240ae0 RCX: ffffc90014b78000 RDX: 0000000000080000 RSI: ffffffff81bbd78b RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffffffffffffffef R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff81c264f0 FS: 00007f27217f66c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e80dff8 CR3: 00000000268f8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> tracepoint_probe_register_prio+0xc0/0x110 kernel/tracepoint.c:464 register_trace_prio_sched_switch include/trace/events/sched.h:222 [inline] register_pid_events kernel/trace/trace_events.c:2354 [inline] event_pid_write.isra.0+0x439/0x7a0 kernel/trace/trace_events.c:2425 vfs_write+0x24c/0x1150 fs/read_write.c:677 ksys_write+0x12b/0x250 fs/read_write.c:731 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f We can reproduce the warning by following the steps below: 1. echo 8 >> set_event_notrace_pid. Let tr->filtered_pids owns one pid and register sched_switch tracepoint. 2. echo ' ' >> set_event_pid, and perform fault injection during chunk allocation of trace_pid_list_alloc. Let pid_list with no pid and assign to tr->filtered_pids. 3. echo ' ' >> set_event_pid. Let pid_list is NULL and assign to tr->filtered_pids. 4. echo 9 >> set_event_pid, will trigger the double register sched_switch tracepoint warning. The reason is that syzkaller injects a fault into the chunk allocation in trace_pid_list_alloc, causing a failure in trace_pid_list_set, which may trigger double register of the same tracepoint. This only occurs when the system is about to crash, but to suppress this warning, let's add failure handling logic to trace_pid_list_set.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8d6e90983ade25ec7925211ac31d9ccaf64b7edf , < 7583a73c53f1d1ae7a39b130eb7190a11f0a902f (git)
Affected: 8d6e90983ade25ec7925211ac31d9ccaf64b7edf , < 1262bda871dace8c6efae25f3b6a2d34f6f06d54 (git)
Affected: 8d6e90983ade25ec7925211ac31d9ccaf64b7edf , < 88525accf16947ab459f8e91c27c8c53e1d612d7 (git)
Affected: 8d6e90983ade25ec7925211ac31d9ccaf64b7edf , < 793338906ff57d8c683f44fe48ca99d49c8782a7 (git)
Affected: 8d6e90983ade25ec7925211ac31d9ccaf64b7edf , < cd4453c5e983cf1fd5757e9acb915adb1e4602b6 (git)
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Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 6.1.153 , ≤ 6.1.* (semver)
Unaffected: 6.6.107 , ≤ 6.6.* (semver)
Unaffected: 6.12.48 , ≤ 6.12.* (semver)
Unaffected: 6.16.8 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Silence warning when chunk allocation fails in trace_pid_write\n\nSyzkaller trigger a fault injection warning:\n\nWARNING: CPU: 1 PID: 12326 at tracepoint_add_func+0xbfc/0xeb0\nModules linked in:\nCPU: 1 UID: 0 PID: 12326 Comm: syz.6.10325 Tainted: G U 6.14.0-rc5-syzkaller #0\nTainted: [U]=USER\nHardware name: Google Compute Engine/Google Compute Engine\nRIP: 0010:tracepoint_add_func+0xbfc/0xeb0 kernel/tracepoint.c:294\nCode: 09 fe ff 90 0f 0b 90 0f b6 74 24 43 31 ff 41 bc ea ff ff ff\nRSP: 0018:ffffc9000414fb48 EFLAGS: 00010283\nRAX: 00000000000012a1 RBX: ffffffff8e240ae0 RCX: ffffc90014b78000\nRDX: 0000000000080000 RSI: ffffffff81bbd78b RDI: 0000000000000001\nRBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000\nR10: 0000000000000001 R11: 0000000000000001 R12: ffffffffffffffef\nR13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff81c264f0\nFS:  00007f27217f66c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000001b2e80dff8 CR3: 00000000268f8000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n tracepoint_probe_register_prio+0xc0/0x110 kernel/tracepoint.c:464\n register_trace_prio_sched_switch include/trace/events/sched.h:222 [inline]\n register_pid_events kernel/trace/trace_events.c:2354 [inline]\n event_pid_write.isra.0+0x439/0x7a0 kernel/trace/trace_events.c:2425\n vfs_write+0x24c/0x1150 fs/read_write.c:677\n ksys_write+0x12b/0x250 fs/read_write.c:731\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nWe can reproduce the warning by following the steps below:\n1. echo 8 \u003e\u003e set_event_notrace_pid. Let tr-\u003efiltered_pids owns one pid\n   and register sched_switch tracepoint.\n2. echo \u0027 \u0027 \u003e\u003e set_event_pid, and perform fault injection during chunk\n   allocation of trace_pid_list_alloc. Let pid_list with no pid and\nassign to tr-\u003efiltered_pids.\n3. echo \u0027 \u0027 \u003e\u003e set_event_pid. Let pid_list is NULL and assign to\n   tr-\u003efiltered_pids.\n4. echo 9 \u003e\u003e set_event_pid, will trigger the double register\n   sched_switch tracepoint warning.\n\nThe reason is that syzkaller injects a fault into the chunk allocation\nin trace_pid_list_alloc, causing a failure in trace_pid_list_set, which\nmay trigger double register of the same tracepoint. This only occurs\nwhen the system is about to crash, but to suppress this warning, let\u0027s\nadd failure handling logic to trace_pid_list_set."
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Let tr-\u003efiltered_pids owns one pid\\n   and register sched_switch tracepoint.\\n2. echo \u0027 \u0027 \u003e\u003e set_event_pid, and perform fault injection during chunk\\n   allocation of trace_pid_list_alloc. Let pid_list with no pid and\\nassign to tr-\u003efiltered_pids.\\n3. echo \u0027 \u0027 \u003e\u003e set_event_pid. Let pid_list is NULL and assign to\\n   tr-\u003efiltered_pids.\\n4. echo 9 \u003e\u003e set_event_pid, will trigger the double register\\n   sched_switch tracepoint warning.\\n\\nThe reason is that syzkaller injects a fault into the chunk allocation\\nin trace_pid_list_alloc, causing a failure in trace_pid_list_set, which\\nmay trigger double register of the same tracepoint. This only occurs\\nwhen the system is about to crash, but to suppress this warning, let\u0027s\\nadd failure handling logic to trace_pid_list_set.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-415\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.153\",\"matchCriteriaId\":\"39B3B4F7-FA64-4E7C-B55D-53A5D004A639\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.107\",\"matchCriteriaId\":\"D273EDA6-2CFE-4EBD-B024-62EB057830F3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.48\",\"matchCriteriaId\":\"9652E701-5C8E-49CF-89A5-499E214A5902\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.16.8\",\"matchCriteriaId\":\"8DA00A4E-AABB-4A69-AB39-67B22D0B36D2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"327D22EF-390B-454C-BD31-2ED23C998A1C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C730CD9A-D969-4A8E-9522-162AAF7C0EE9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"39982C4B-716E-4B2F-8196-FA301F47807D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"340BEEA9-D70D-4290-B502-FBB1032353B1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"47E4C5C0-079F-4838-971B-8C503D48FCC2\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1262bda871dace8c6efae25f3b6a2d34f6f06d54\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7583a73c53f1d1ae7a39b130eb7190a11f0a902f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/793338906ff57d8c683f44fe48ca99d49c8782a7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/88525accf16947ab459f8e91c27c8c53e1d612d7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cd4453c5e983cf1fd5757e9acb915adb1e4602b6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}"
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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