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NVD / CVE Program· CNA Linux

CVE-2025-39995: media: i2c: tc358743: Fix use-after-free bugs caused by orphan timer in probe

—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.23% (FIRST EPSS).
  • Fixed version: Linux Linux 228d06c4cbfc750f1216a3fd91b4693b0766d2f6, 2610617effb4454d2f1c434c011ccb5cc7140711, 3d17701c156579969470e58b3a906511f8bc018d.

Low priority for now. Upgrade to Linux Linux 228d06c4cbfc750f1216a3fd91b4693b0766d2f6, 2610617effb4454d2f1c434c011ccb5cc7140711, 3d17701c156579969470e58b3a906511f8bc018d or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: media: i2c: tc358743: Fix use-after-free bugs caused by orphan timer in probe The state->timer is a cyclic timer that schedules work_i2c_poll and delayed_work_enable_hotplug, while rearming itself. Using timer_delete() fails to guarantee the timer isn't still running when destroyed, similarly cancel_delayed_work() cannot ensure delayed_work_enable_hotplug has terminated if already executing. During probe failure after timer initialization, these may continue running as orphans and reference the already-freed tc358743_state object through tc358743_irq_poll_timer. The following is the trace captured by KASAN. BUG: KASAN: slab-use-after-free in __run_timer_base.part.0+0x7d7/0x8c0 Write of size 8 at addr ffff88800ded83c8 by task swapper/1/0 ... Call Trace: <IRQ> dump_stack_lvl+0x55/0x70 print_report+0xcf/0x610 ? __pfx_sched_balance_find_src_group+0x10/0x10 ? __run_timer_base.part.0+0x7d7/0x8c0 kasan_report+0xb8/0xf0 ? __run_timer_base.part.0+0x7d7/0x8c0 __run_timer_base.part.0+0x7d7/0x8c0 ? rcu_sched_clock_irq+0xb06/0x27d0 ? __pfx___run_timer_base.part.0+0x10/0x10 ? try_to_wake_up+0xb15/0x1960 ? tmigr_update_events+0x280/0x740 ? _raw_spin_lock_irq+0x80/0xe0 ? __pfx__raw_spin_lock_irq+0x10/0x10 tmigr_handle_remote_up+0x603/0x7e0 ? __pfx_tmigr_handle_remote_up+0x10/0x10 ? sched_balance_trigger+0x98/0x9f0 ? sched_tick+0x221/0x5a0 ? _raw_spin_lock_irq+0x80/0xe0 ? __pfx__raw_spin_lock_irq+0x10/0x10 ? tick_nohz_handler+0x339/0x440 ? __pfx_tmigr_handle_remote_up+0x10/0x10 __walk_groups.isra.0+0x42/0x150 tmigr_handle_remote+0x1f4/0x2e0 ? __pfx_tmigr_handle_remote+0x10/0x10 ? ktime_get+0x60/0x140 ? lapic_next_event+0x11/0x20 ? clockevents_program_event+0x1d4/0x2a0 ? hrtimer_interrupt+0x322/0x780 handle_softirqs+0x16a/0x550 irq_exit_rcu+0xaf/0xe0 sysvec_apic_timer_interrupt+0x70/0x80 </IRQ> ... Allocated by task 141: kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 __kasan_kmalloc+0x7f/0x90 __kmalloc_node_track_caller_noprof+0x198/0x430 devm_kmalloc+0x7b/0x1e0 tc358743_probe+0xb7/0x610 i2c_device_probe+0x51d/0x880 really_probe+0x1ca/0x5c0 __driver_probe_device+0x248/0x310 driver_probe_device+0x44/0x120 __device_attach_driver+0x174/0x220 bus_for_each_drv+0x100/0x190 __device_attach+0x206/0x370 bus_probe_device+0x123/0x170 device_add+0xd25/0x1470 i2c_new_client_device+0x7a0/0xcd0 do_one_initcall+0x89/0x300 do_init_module+0x29d/0x7f0 load_module+0x4f48/0x69e0 init_module_from_file+0xe4/0x150 idempotent_init_module+0x320/0x670 __x64_sys_finit_module+0xbd/0x120 do_syscall_64+0xac/0x280 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 141: kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3a/0x60 __kasan_slab_free+0x3f/0x50 kfree+0x137/0x370 release_nodes+0xa4/0x100 devres_release_group+0x1b2/0x380 i2c_device_probe+0x694/0x880 really_probe+0x1ca/0x5c0 __driver_probe_device+0x248/0x310 driver_probe_device+0x44/0x120 __device_attach_driver+0x174/0x220 bus_for_each_drv+0x100/0x190 __device_attach+0x206/0x370 bus_probe_device+0x123/0x170 device_add+0xd25/0x1470 i2c_new_client_device+0x7a0/0xcd0 do_one_initcall+0x89/0x300 do_init_module+0x29d/0x7f0 load_module+0x4f48/0x69e0 init_module_from_file+0xe4/0x150 idempotent_init_module+0x320/0x670 __x64_sys_finit_module+0xbd/0x120 do_syscall_64+0xac/0x280 entry_SYSCALL_64_after_hwframe+0x77/0x7f ... Replace timer_delete() with timer_delete_sync() and cancel_delayed_work() with cancel_delayed_work_sync() to ensure proper termination of timer and work items before resource cleanup. This bug was initially identified through static analysis. For reproduction and testing, I created a functional emulation of the tc358743 device via a kernel module and introduced faults through the debugfs interface.

Published
Oct 15, 2025
Updated
Oct 19, 2026
EPSS
0.2% · 14th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.3affected
    • d32d98642de66048f9534a05f3641558e811bbc9 and later · before 9205fb6e617a1c596d9a9ad2a160ee696e09d520affected · git
    • d32d98642de66048f9534a05f3641558e811bbc9 and later · before 70913586c717dd25cfbade7a418e92cc9c99398aaffected · git
    • d32d98642de66048f9534a05f3641558e811bbc9 and later · before 663faf1179db9663a3793c75e9bc869358bad910affected · git
    • d32d98642de66048f9534a05f3641558e811bbc9 and later · before 3d17701c156579969470e58b3a906511f8bc018daffected · git
    • d32d98642de66048f9534a05f3641558e811bbc9 and later · before 228d06c4cbfc750f1216a3fd91b4693b0766d2f6affected · git
    • d32d98642de66048f9534a05f3641558e811bbc9 and later · before f92181c0e13cad9671d07b15be695a97fc2534a3affected · git
    • d32d98642de66048f9534a05f3641558e811bbc9 and later · before f3f3f00bcabbd2ce0a77a2ac7a6797b8646bfd8baffected · git
    • d32d98642de66048f9534a05f3641558e811bbc9 and later · before 2610617effb4454d2f1c434c011ccb5cc7140711affected · git
    • d32d98642de66048f9534a05f3641558e811bbc9 and later · before 79d10f4f21a92e459b2276a77be62c59c1502c9daffected · git

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.158-16.1.158-1
Debian:13linuxbefore 6.12.57-16.12.57-1
Debian:14linuxbefore 6.16.11-16.16.11-1
openSUSE:Tumbleweedkernel-sourcebefore 6.17.5-1.16.17.5-1.1
openSUSE:Tumbleweedkernel-source-longtermbefore 6.18.16-1.16.18.16-1.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2025-39993Oct 15, 2025 · media: rc: fix races with imon_disconnect()
    31Monitor
  • ← EarlierCVE-2025-39994Oct 15, 2025 · media: tuner: xc5000: Fix use-after-free in xc5000_release
    29Monitor
  • Later →CVE-2025-39996Oct 15, 2025 · media: b2c2: Fix use-after-free causing by irq_check_work in flexcop_pci_remove
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux228d06c4cbfc750f1216a3fd91b4693b0766d2f6Vendor (CNA)
Linux Linux2610617effb4454d2f1c434c011ccb5cc7140711Vendor (CNA)
Linux Linux3d17701c156579969470e58b3a906511f8bc018dVendor (CNA)
Linux Linux663faf1179db9663a3793c75e9bc869358bad910Vendor (CNA)
Linux Linux70913586c717dd25cfbade7a418e92cc9c99398aVendor (CNA)
Linux Linux79d10f4f21a92e459b2276a77be62c59c1502c9dVendor (CNA)
Linux Linux9205fb6e617a1c596d9a9ad2a160ee696e09d520Vendor (CNA)
Linux Linuxf3f3f00bcabbd2ce0a77a2ac7a6797b8646bfd8bVendor (CNA)
Linux Linuxf92181c0e13cad9671d07b15be695a97fc2534a3Vendor (CNA)
debian:linux6.1.158-1 · Debian:12Package registry (OSV)
opensuse:kernel-source6.17.5-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:kernel-source-longterm6.18.16-1.1 · openSUSE:TumbleweedPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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