gpu: host1x: Fix a use of uninitialized mutex
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-908 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: gpu: host1x: Fix a use of uninitialized mutex commit c8347f915e67 ("gpu: host1x: Fix boot regression for Tegra") caused a use of uninitialized mutex leading to below warning when CONFIG_DEBUG_MUTEXES and CONFIG_DEBUG_LOCK_ALLOC are enabled. [ 41.662843] ------------[ cut here ]------------ [ 41.663012] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 41.663035] WARNING: CPU: 4 PID: 794 at kernel/locking/mutex.c:587 __mutex_lock+0x670/0x878 [ 41.663458] Modules linked in: rtw88_8822c(+) bluetooth(+) rtw88_pci rtw88_core mac80211 aquantia libarc4 crc_itu_t cfg80211 tegra194_cpufreq dwmac_tegra(+) arm_dsu_pmu stmmac_platform stmmac pcs_xpcs rfkill at24 host1x(+) tegra_bpmp_thermal ramoops reed_solomon fuse loop nfnetlink xfs mmc_block rpmb_core ucsi_ccg ina3221 crct10dif_ce xhci_tegra ghash_ce lm90 sha2_ce sha256_arm64 sha1_ce sdhci_tegra pwm_fan sdhci_pltfm sdhci gpio_keys rtc_tegra cqhci mmc_core phy_tegra_xusb i2c_tegra tegra186_gpc_dma i2c_tegra_bpmp spi_tegra114 dm_mirror dm_region_hash dm_log dm_mod [ 41.665078] CPU: 4 UID: 0 PID: 794 Comm: (udev-worker) Not tainted 6.11.0-29.31_1538613708.el10.aarch64+debug #1 [ 41.665838] Hardware name: NVIDIA NVIDIA Jetson AGX Orin Developer Kit/Jetson, BIOS 36.3.0-gcid-35594366 02/26/2024 [ 41.672555] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 41.679636] pc : __mutex_lock+0x670/0x878 [ 41.683834] lr : __mutex_lock+0x670/0x878 [ 41.688035] sp : ffff800084b77090 [ 41.691446] x29: ffff800084b77160 x28: ffffdd4bebf7b000 x27: ffffdd4be96b1000 [ 41.698799] x26: 1fffe0002308361c x25: 1ffff0001096ee18 x24: 0000000000000000 [ 41.706149] x23: 0000000000000000 x22: 0000000000000002 x21: ffffdd4be6e3c7a0 [ 41.713500] x20: ffff800084b770f0 x19: ffff00011841b1e8 x18: 0000000000000000 [ 41.720675] x17: 0000000000000000 x16: 0000000000000000 x15: 0720072007200720 [ 41.728023] x14: 0000000000000000 x13: 0000000000000001 x12: ffff6001a96eaab3 [ 41.735375] x11: 1fffe001a96eaab2 x10: ffff6001a96eaab2 x9 : ffffdd4be4838bbc [ 41.742723] x8 : 00009ffe5691554e x7 : ffff000d4b755593 x6 : 0000000000000001 [ 41.749985] x5 : ffff000d4b755590 x4 : 1fffe0001d88f001 x3 : dfff800000000000 [ 41.756988] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000ec478000 [ 41.764251] Call trace: [ 41.766695] __mutex_lock+0x670/0x878 [ 41.770373] mutex_lock_nested+0x2c/0x40 [ 41.774134] host1x_intr_start+0x54/0xf8 [host1x] [ 41.778863] host1x_runtime_resume+0x150/0x228 [host1x] [ 41.783935] pm_generic_runtime_resume+0x84/0xc8 [ 41.788485] __rpm_callback+0xa0/0x478 [ 41.792422] rpm_callback+0x15c/0x1a8 [ 41.795922] rpm_resume+0x698/0xc08 [ 41.799597] __pm_runtime_resume+0xa8/0x140 [ 41.803621] host1x_probe+0x810/0xbc0 [host1x] [ 41.807909] platform_probe+0xcc/0x1a8 [ 41.811845] really_probe+0x188/0x800 [ 41.815347] __driver_probe_device+0x164/0x360 [ 41.819810] driver_probe_device+0x64/0x1a8 [ 41.823834] __driver_attach+0x180/0x490 [ 41.827773] bus_for_each_dev+0x104/0x1a0 [ 41.831797] driver_attach+0x44/0x68 [ 41.835296] bus_add_driver+0x23c/0x4e8 [ 41.839235] driver_register+0x15c/0x3a8 [ 41.843170] __platform_register_drivers+0xa4/0x208 [ 41.848159] tegra_host1x_init+0x4c/0xff8 [host1x] [ 41.853147] do_one_initcall+0xd4/0x380 [ 41.856997] do_init_module+0x1dc/0x698 [ 41.860758] load_module+0xc70/0x1300 [ 41.864435] __do_sys_init_module+0x1a8/0x1d0 [ 41.868721] __arm64_sys_init_module+0x74/0xb0 [ 41.873183] invoke_syscall.constprop.0+0xdc/0x1e8 [ 41.877997] do_el0_svc+0x154/0x1d0 [ 41.881671] el0_svc+0x54/0x140 [ 41.884820] el0t_64_sync_handler+0x120/0x130 [ 41.889285] el0t_64_sync+0x1a4/0x1a8 [ 41.892960] irq event stamp: 69737 [ 41.896370] hardirqs last enabled at (69737): [<ffffdd4be6d7768c>] _raw_spin_unlock_irqrestore+0x44/0xe8 [ 41.905739] hardirqs last disabled at (69736): ---truncated---
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 6.12 and later | 6.12.16, 6.13.4, 6.14 | Patch available | CNA |
- Linux VendorLinux Affected 6.12 and later Fixed in 6.12.16, 6.13.4, 6.14 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.12 to before 6.12.16; 6.13 to before 6.13.4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:* | 6.14 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:* | 6.14 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:* | 6.14 rc3 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.12 to before 6.12.16; 6.13 to before 6.13.4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:* Versions 6.14 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:* Versions 6.14 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:* Versions 6.14 rc3 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.12.16, 6.13.4, 6.14
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
Not affected: 4 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2025-21824
- 2026-10-03 Alias added: GHSA-x45r-q45r-hq9w
References
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2025-21824 · CVE Program
- CVE-2025-21824 · NVD
- FIRST EPSS
- GHSA-x45r-q45r-hq9w · GitHub Advisory Database · CC BY 4.0
- CVE-2025-21824 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences