CVE-2024-35920 (GCVE-0-2024-35920)
Vulnerability from cvelistv5 – Published: 2024-05-19 10:10 – Updated: 2026-08-05 11:30
VLAI
EPSS
VEX
Title
media: mediatek: vcodec: adding lock to protect decoder context list
Summary
In the Linux kernel, the following vulnerability has been resolved:
media: mediatek: vcodec: adding lock to protect decoder context list
Add a lock for the ctx_list, to avoid accessing a NULL pointer
within the 'vpu_dec_ipi_handler' function when the ctx_list has
been deleted due to an unexpected behavior on the SCP IP block.
Hardware name: Google juniper sku16 board (DT)
pstate: 20400005 (nzCv daif +PAN -UAO -TCO BTYPE=--)
pc : vpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec]
lr : scp_ipi_handler+0xd0/0x194 [mtk_scp]
sp : ffffffc0131dbbd0
x29: ffffffc0131dbbd0 x28: 0000000000000000
x27: ffffff9bb277f348 x26: ffffff9bb242ad00
x25: ffffffd2d440d3b8 x24: ffffffd2a13ff1d4
x23: ffffff9bb7fe85a0 x22: ffffffc0133fbdb0
x21: 0000000000000010 x20: ffffff9b050ea328
x19: ffffffc0131dbc08 x18: 0000000000001000
x17: 0000000000000000 x16: ffffffd2d461c6e0
x15: 0000000000000242 x14: 000000000000018f
x13: 000000000000004d x12: 0000000000000000
x11: 0000000000000001 x10: fffffffffffffff0
x9 : ffffff9bb6e793a8 x8 : 0000000000000000
x7 : 0000000000000000 x6 : 000000000000003f
x5 : 0000000000000040 x4 : fffffffffffffff0
x3 : 0000000000000020 x2 : ffffff9bb6e79080
x1 : 0000000000000010 x0 : ffffffc0131dbc08
Call trace:
vpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec (HASH:6c3f 2)]
scp_ipi_handler+0xd0/0x194 [mtk_scp (HASH:7046 3)]
mt8183_scp_irq_handler+0x44/0x88 [mtk_scp (HASH:7046 3)]
scp_irq_handler+0x48/0x90 [mtk_scp (HASH:7046 3)]
irq_thread_fn+0x38/0x94
irq_thread+0x100/0x1c0
kthread+0x140/0x1fc
ret_from_fork+0x10/0x30
Code: 54000088 f94ca50a eb14015f 54000060 (f9400108)
---[ end trace ace43ce36cbd5c93 ]---
Kernel panic - not syncing: Oops: Fatal exception
SMP: stopping secondary CPUs
Kernel Offset: 0x12c4000000 from 0xffffffc010000000
PHYS_OFFSET: 0xffffffe580000000
CPU features: 0x08240002,2188200c
Memory Limit: none
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-17 17:38 UTC
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
655b86e52eacdce79c2e02c5ec7258a97fcc2e4a , < 0a2dc707aa42214f9c4827bd57e344e29a0841d6
(git)
Affected: 655b86e52eacdce79c2e02c5ec7258a97fcc2e4a , < 23aaf824121055ba81b55f75444355bd83c8eb38 (git) Affected: 655b86e52eacdce79c2e02c5ec7258a97fcc2e4a , < 6467cda18c9f9b5f2f9a0aa1e2861c653e41f382 (git) |
guessed | |
| Linux | Linux |
Affected:
6.6
Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.27 , ≤ 6.6.* (semver) Unaffected: 6.8.6 , ≤ 6.8.* (semver) Unaffected: 6.9 , ≤ * (original_commit_for_fix) |
guessed |
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"drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h",
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mediatek: vcodec: adding lock to protect decoder context list\n\nAdd a lock for the ctx_list, to avoid accessing a NULL pointer\nwithin the \u0027vpu_dec_ipi_handler\u0027 function when the ctx_list has\nbeen deleted due to an unexpected behavior on the SCP IP block.\n\nHardware name: Google juniper sku16 board (DT)\npstate: 20400005 (nzCv daif +PAN -UAO -TCO BTYPE=--)\npc : vpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec]\nlr : scp_ipi_handler+0xd0/0x194 [mtk_scp]\nsp : ffffffc0131dbbd0\nx29: ffffffc0131dbbd0 x28: 0000000000000000\nx27: ffffff9bb277f348 x26: ffffff9bb242ad00\nx25: ffffffd2d440d3b8 x24: ffffffd2a13ff1d4\nx23: ffffff9bb7fe85a0 x22: ffffffc0133fbdb0\nx21: 0000000000000010 x20: ffffff9b050ea328\nx19: ffffffc0131dbc08 x18: 0000000000001000\nx17: 0000000000000000 x16: ffffffd2d461c6e0\nx15: 0000000000000242 x14: 000000000000018f\nx13: 000000000000004d x12: 0000000000000000\nx11: 0000000000000001 x10: fffffffffffffff0\nx9 : ffffff9bb6e793a8 x8 : 0000000000000000\nx7 : 0000000000000000 x6 : 000000000000003f\nx5 : 0000000000000040 x4 : fffffffffffffff0\nx3 : 0000000000000020 x2 : ffffff9bb6e79080\nx1 : 0000000000000010 x0 : ffffffc0131dbc08\nCall trace:\nvpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec (HASH:6c3f 2)]\nscp_ipi_handler+0xd0/0x194 [mtk_scp (HASH:7046 3)]\nmt8183_scp_irq_handler+0x44/0x88 [mtk_scp (HASH:7046 3)]\nscp_irq_handler+0x48/0x90 [mtk_scp (HASH:7046 3)]\nirq_thread_fn+0x38/0x94\nirq_thread+0x100/0x1c0\nkthread+0x140/0x1fc\nret_from_fork+0x10/0x30\nCode: 54000088 f94ca50a eb14015f 54000060 (f9400108)\n---[ end trace ace43ce36cbd5c93 ]---\nKernel panic - not syncing: Oops: Fatal exception\nSMP: stopping secondary CPUs\nKernel Offset: 0x12c4000000 from 0xffffffc010000000\nPHYS_OFFSET: 0xffffffe580000000\nCPU features: 0x08240002,2188200c\nMemory Limit: none"
}
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"lang": "en",
"value": "AV:L - The vulnerable code is reached by opening/closing and driving the MediaTek V4L2 decoder node `/dev/videoN`, i.e. local syscalls on the device file. There is no network-facing path into `vpu_dec_check_ap_inst()`.\nAC:L - The attacker controls both sides of the race \u2014 an `open()`/`close()` loop mutates the shared `dev-\u003ectx_list` while decode jobs it submitted drive the SCP IPI ACKs that enter the unlocked `list_for_each_entry()`. It can also deterministically widen the window by opening many contexts and by forcing the 2000 ms `scp_ipi_send()` ACK timeout so late ACKs arrive after the context was freed.\nPR:L - `fops_vcodec_open()` enforces no capability check; any local user with access to the `/dev/video*` node (video group, and the sandboxed media/GPU processes on ChromeOS and Android that routinely hold it) can reach it. No root or CAP_* privilege is needed.\nUI:N - The attacking process performs every step itself \u2014 opening the decoder, submitting a bitstream, and closing the fd concurrently. No victim action or interaction is required.\nS:U - The corruption and the vulnerable code are both in the kernel\u0027s own security authority; the SCP co-processor merely delivers the IPI that triggers it. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unlocked traversal reads `ctx-\u003elist.next` and `ctx-\u003evpu_inst` out of a `mtk_vcodec_dec_ctx` that was just `kfree()`d, a use-after-free read of a reallocatable slab object. Heap grooming lets the attacker supply the link pointer, turning the loop into a controlled-address dereference usable for kernel memory disclosure.\nI:H - Because the staleness guard is racy, `vpu_dec_ipi_handler()` proceeds against a freed `vdec_vpu_inst` (freed with its containing `vdec_h264_inst`/`vdec_vp9_inst` in `fops_vcodec_release()`), writing `vpu-\u003efailure`, `vpu-\u003esignaled`, and on INIT_ACK `vpu-\u003evsi`/`vpu-\u003einst_addr`/`vpu-\u003einst_id` into memory that may already be reallocated. That is a use-after-free write at fixed offsets, exploitable for cross-object corruption and control-flow hijack.\nA:H - The commit records a reproduced fatal oops in `vpu_dec_ipi_handler+0x58` ending in \"Kernel panic - not syncing: Oops: Fatal exception\" with secondary CPUs stopped. Any local user able to open the decoder node can trigger this repeatedly for a full system crash."
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"title": "media: mediatek: vcodec: adding lock to protect decoder context list",
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"assignerShortName": "Linux",
"cveId": "CVE-2024-35920",
"datePublished": "2024-05-19T10:10:32.379Z",
"dateReserved": "2024-05-17T13:50:33.124Z",
"dateUpdated": "2026-08-05T11:30:59.577Z",
"state": "PUBLISHED"
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"epss": {
"cve": "CVE-2024-35920",
"date": "2026-09-15",
"epss": "0.00236",
"percentile": "0.14711"
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"fkie_nvd": {
"descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmedia: mediatek: vcodec: adding lock to protect decoder context list\\n\\nAdd a lock for the ctx_list, to avoid accessing a NULL pointer\\nwithin the \u0027vpu_dec_ipi_handler\u0027 function when the ctx_list has\\nbeen deleted due to an unexpected behavior on the SCP IP block.\\n\\nHardware name: Google juniper sku16 board (DT)\\npstate: 20400005 (nzCv daif +PAN -UAO -TCO BTYPE=--)\\npc : vpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec]\\nlr : scp_ipi_handler+0xd0/0x194 [mtk_scp]\\nsp : ffffffc0131dbbd0\\nx29: ffffffc0131dbbd0 x28: 0000000000000000\\nx27: ffffff9bb277f348 x26: ffffff9bb242ad00\\nx25: ffffffd2d440d3b8 x24: ffffffd2a13ff1d4\\nx23: ffffff9bb7fe85a0 x22: ffffffc0133fbdb0\\nx21: 0000000000000010 x20: ffffff9b050ea328\\nx19: ffffffc0131dbc08 x18: 0000000000001000\\nx17: 0000000000000000 x16: ffffffd2d461c6e0\\nx15: 0000000000000242 x14: 000000000000018f\\nx13: 000000000000004d x12: 0000000000000000\\nx11: 0000000000000001 x10: fffffffffffffff0\\nx9 : ffffff9bb6e793a8 x8 : 0000000000000000\\nx7 : 0000000000000000 x6 : 000000000000003f\\nx5 : 0000000000000040 x4 : fffffffffffffff0\\nx3 : 0000000000000020 x2 : ffffff9bb6e79080\\nx1 : 0000000000000010 x0 : ffffffc0131dbc08\\nCall trace:\\nvpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec (HASH:6c3f 2)]\\nscp_ipi_handler+0xd0/0x194 [mtk_scp (HASH:7046 3)]\\nmt8183_scp_irq_handler+0x44/0x88 [mtk_scp (HASH:7046 3)]\\nscp_irq_handler+0x48/0x90 [mtk_scp (HASH:7046 3)]\\nirq_thread_fn+0x38/0x94\\nirq_thread+0x100/0x1c0\\nkthread+0x140/0x1fc\\nret_from_fork+0x10/0x30\\nCode: 54000088 f94ca50a eb14015f 54000060 (f9400108)\\n---[ end trace ace43ce36cbd5c93 ]---\\nKernel panic - not syncing: Oops: Fatal exception\\nSMP: stopping secondary CPUs\\nKernel Offset: 0x12c4000000 from 0xffffffc010000000\\nPHYS_OFFSET: 0xffffffe580000000\\nCPU features: 0x08240002,2188200c\\nMemory Limit: none\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: media: mediatek: vcodec: agregar bloqueo para proteger la lista de contexto del decodificador. Agregue un bloqueo para ctx_list, para evitar acceder a un puntero NULL dentro de la funci\\u00f3n \u0027vpu_dec_ipi_handler\u0027 cuando se ha eliminado ctx_list debido a un comportamiento inesperado en el bloque de IP de SCP. Nombre del hardware: placa Google Juniper sku16 (DT) pstate: 20400005 (nzCv daif +PAN -UAO -TCO BTYPE=--) pc: vpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec] lr: scp_ipi_handler+0xd0/0x194 [mtk_scp] sp: 31dbbd0 x29: ffffffc0131dbbd0 x28: 0000000000000000 x27: ffffff9bb277f348 x26: ffffff9bb242ad00 x25: ffffffd2d440d3b8 x24: ffffffd2a13ff1d4 x23: ffffff9bb7fe85a0 22: ffffffc0133fbdb0 x21: 0000000000000010 x20: ffffff9b050ea328 x19: ffffffc0131dbc08 x18: 0000000000001000 x17: 0000000000000000 x16: 461c6e0 x15: 0000000000000242 x14: 000000000000018f x13: 000000000000004d x12: 0000000000000000 x11: 0000000000000001 x10: fffffffffffffff0 x9: ffffff9bb6e793a8 x8: 0000000000000000 x7: 00000000000 00000 x6: 000000000000003f x5: 0000000000000040 x4: fffffffffffffff0 x3: 0000000000000020 x2: ffffff9bb6e79080 x1: 0000000000000010 x0: ffffffc013 1dbc08 Rastreo de llamadas: vpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec (HASH:6c3f 2)] scp_ipi_handler+0xd0/0x194 [mtk_scp (HASH:7046 3)] mt8183_scp_irq_handler+0x44/0x88 [mtk_scp (HASH:7046 3)] scp_irq_handler+0x48/0x90 (HASH:7046 3)] irq_thread_fn +0x38/0x94 irq_thread+0x100/0x1c0 kthread+0x140/0x1fc ret_from_fork+0x10/0x30 C\\u00f3digo: 54000088 f94ca50a eb14015f 54000060 (f9400108) ---[ end trace ace43ce36cbd5c93 ] --- P\\u00e1nico del kernel: no se sincroniza: Ups: excepci\\u00f3n fatal SMP : detener CPU secundarias Desplazamiento del kernel: 0x12c4000000 de 0xffffffc010000000 PHYS_OFFSET: 0xffffffe580000000 Caracter\\u00edsticas de la CPU: 0x08240002,2188200c L\\u00edmite de memoria: ninguno\"}]",
"id": "CVE-2024-35920",
"lastModified": "2024-11-21T09:21:12.443",
"published": "2024-05-19T11:15:48.373",
"references": "[{\"url\": \"https://git.kernel.org/stable/c/0a2dc707aa42214f9c4827bd57e344e29a0841d6\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/23aaf824121055ba81b55f75444355bd83c8eb38\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/6467cda18c9f9b5f2f9a0aa1e2861c653e41f382\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/0a2dc707aa42214f9c4827bd57e344e29a0841d6\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/23aaf824121055ba81b55f75444355bd83c8eb38\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/6467cda18c9f9b5f2f9a0aa1e2861c653e41f382\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2024-35920\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-19T11:15:48.373\",\"lastModified\":\"2026-08-04T11:18:11.700\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmedia: mediatek: vcodec: adding lock to protect decoder context list\\n\\nAdd a lock for the ctx_list, to avoid accessing a NULL pointer\\nwithin the \u0027vpu_dec_ipi_handler\u0027 function when the ctx_list has\\nbeen deleted due to an unexpected behavior on the SCP IP block.\\n\\nHardware name: Google juniper sku16 board (DT)\\npstate: 20400005 (nzCv daif +PAN -UAO -TCO BTYPE=--)\\npc : vpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec]\\nlr : scp_ipi_handler+0xd0/0x194 [mtk_scp]\\nsp : ffffffc0131dbbd0\\nx29: ffffffc0131dbbd0 x28: 0000000000000000\\nx27: ffffff9bb277f348 x26: ffffff9bb242ad00\\nx25: ffffffd2d440d3b8 x24: ffffffd2a13ff1d4\\nx23: ffffff9bb7fe85a0 x22: ffffffc0133fbdb0\\nx21: 0000000000000010 x20: ffffff9b050ea328\\nx19: ffffffc0131dbc08 x18: 0000000000001000\\nx17: 0000000000000000 x16: ffffffd2d461c6e0\\nx15: 0000000000000242 x14: 000000000000018f\\nx13: 000000000000004d x12: 0000000000000000\\nx11: 0000000000000001 x10: fffffffffffffff0\\nx9 : ffffff9bb6e793a8 x8 : 0000000000000000\\nx7 : 0000000000000000 x6 : 000000000000003f\\nx5 : 0000000000000040 x4 : fffffffffffffff0\\nx3 : 0000000000000020 x2 : ffffff9bb6e79080\\nx1 : 0000000000000010 x0 : ffffffc0131dbc08\\nCall trace:\\nvpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec (HASH:6c3f 2)]\\nscp_ipi_handler+0xd0/0x194 [mtk_scp (HASH:7046 3)]\\nmt8183_scp_irq_handler+0x44/0x88 [mtk_scp (HASH:7046 3)]\\nscp_irq_handler+0x48/0x90 [mtk_scp (HASH:7046 3)]\\nirq_thread_fn+0x38/0x94\\nirq_thread+0x100/0x1c0\\nkthread+0x140/0x1fc\\nret_from_fork+0x10/0x30\\nCode: 54000088 f94ca50a eb14015f 54000060 (f9400108)\\n---[ end trace ace43ce36cbd5c93 ]---\\nKernel panic - not syncing: Oops: Fatal exception\\nSMP: stopping secondary CPUs\\nKernel Offset: 0x12c4000000 from 0xffffffc010000000\\nPHYS_OFFSET: 0xffffffe580000000\\nCPU features: 0x08240002,2188200c\\nMemory Limit: none\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: media: mediatek: vcodec: agregar bloqueo para proteger la lista de contexto del decodificador. Agregue un bloqueo para ctx_list, para evitar acceder a un puntero NULL dentro de la funci\u00f3n \u0027vpu_dec_ipi_handler\u0027 cuando se ha eliminado ctx_list debido a un comportamiento inesperado en el bloque de IP de SCP. Nombre del hardware: placa Google Juniper sku16 (DT) pstate: 20400005 (nzCv daif +PAN -UAO -TCO BTYPE=--) pc: vpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec] lr: scp_ipi_handler+0xd0/0x194 [mtk_scp] sp: 31dbbd0 x29: ffffffc0131dbbd0 x28: 0000000000000000 x27: ffffff9bb277f348 x26: ffffff9bb242ad00 x25: ffffffd2d440d3b8 x24: ffffffd2a13ff1d4 x23: ffffff9bb7fe85a0 22: ffffffc0133fbdb0 x21: 0000000000000010 x20: ffffff9b050ea328 x19: ffffffc0131dbc08 x18: 0000000000001000 x17: 0000000000000000 x16: 461c6e0 x15: 0000000000000242 x14: 000000000000018f x13: 000000000000004d x12: 0000000000000000 x11: 0000000000000001 x10: fffffffffffffff0 x9: ffffff9bb6e793a8 x8: 0000000000000000 x7: 00000000000 00000 x6: 000000000000003f x5: 0000000000000040 x4: fffffffffffffff0 x3: 0000000000000020 x2: ffffff9bb6e79080 x1: 0000000000000010 x0: ffffffc013 1dbc08 Rastreo de llamadas: vpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec (HASH:6c3f 2)] scp_ipi_handler+0xd0/0x194 [mtk_scp (HASH:7046 3)] mt8183_scp_irq_handler+0x44/0x88 [mtk_scp (HASH:7046 3)] scp_irq_handler+0x48/0x90 (HASH:7046 3)] irq_thread_fn +0x38/0x94 irq_thread+0x100/0x1c0 kthread+0x140/0x1fc ret_from_fork+0x10/0x30 C\u00f3digo: 54000088 f94ca50a eb14015f 54000060 (f9400108) ---[ end trace ace43ce36cbd5c93 ] --- P\u00e1nico del kernel: no se sincroniza: Ups: excepci\u00f3n fatal SMP : detener CPU secundarias Desplazamiento del kernel: 0x12c4000000 de 0xffffffc010000000 PHYS_OFFSET: 0xffffffe580000000 Caracter\u00edsticas de la CPU: 0x08240002,2188200c L\u00edmite de memoria: ninguno\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c\",\"drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c\",\"drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h\",\"drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"655b86e52eacdce79c2e02c5ec7258a97fcc2e4a\",\"lessThan\":\"0a2dc707aa42214f9c4827bd57e344e29a0841d6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"655b86e52eacdce79c2e02c5ec7258a97fcc2e4a\",\"lessThan\":\"23aaf824121055ba81b55f75444355bd83c8eb38\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"655b86e52eacdce79c2e02c5ec7258a97fcc2e4a\",\"lessThan\":\"6467cda18c9f9b5f2f9a0aa1e2861c653e41f382\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c\",\"drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c\",\"drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h\",\"drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.6\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.6\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.27\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.8.6\",\"lessThanOrEqual\":\"6.8.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.9\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"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}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-06-17T17:38:32.899934Z\",\"id\":\"CVE-2024-35920\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.6\",\"versionEndExcluding\":\"6.6.27\",\"matchCriteriaId\":\"3301BF2B-8316-4F95-AE6D-3E81CA63F330\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.8.6\",\"matchCriteriaId\":\"22CA5433-1303-41EF-AD4C-F4645DC01541\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"22BEDD49-2C6D-402D-9DBF-6646F6ECD10B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"DF73CB2A-DFFD-46FB-9BFE-AA394F27EA37\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"52048DDA-FC5A-4363-95A0-A6357B4D7F8C\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0a2dc707aa42214f9c4827bd57e344e29a0841d6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/23aaf824121055ba81b55f75444355bd83c8eb38\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6467cda18c9f9b5f2f9a0aa1e2861c653e41f382\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/0a2dc707aa42214f9c4827bd57e344e29a0841d6\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/23aaf824121055ba81b55f75444355bd83c8eb38\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6467cda18c9f9b5f2f9a0aa1e2861c653e41f382\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\"]}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-04T19:03:16+00:00",
"cve": "CVE-2024-35920",
"id": "CVE-2024-35920",
"initial_release_date": "2024-05-19T00:00:00+00:00",
"product_status:known_not_affected": "198",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: media: mediatek: vcodec: adding lock to protect decoder context list",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-35920.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-08-29T01:55:26Z",
"cve": "CVE-2024-35920",
"id": "CVE-2024-35920",
"initial_release_date": "2024-05-21T01:59:13Z",
"product_status:known_not_affected": "385",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2024-35920",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-35920.json",
"version": "20"
},
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/0a2dc707aa42214f9c4827bd57e344e29a0841d6\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/23aaf824121055ba81b55f75444355bd83c8eb38\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/6467cda18c9f9b5f2f9a0aa1e2861c653e41f382\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T03:21:49.045Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-35920\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-17T17:38:32.899934Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-17T17:38:33.930Z\"}}], \"cna\": {\"title\": \"media: mediatek: vcodec: adding lock to protect decoder context list\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - The vulnerable code is reached by opening/closing and driving the MediaTek V4L2 decoder node `/dev/videoN`, i.e. local syscalls on the device file. There is no network-facing path into `vpu_dec_check_ap_inst()`.\\nAC:L - The attacker controls both sides of the race \\u2014 an `open()`/`close()` loop mutates the shared `dev-\u003ectx_list` while decode jobs it submitted drive the SCP IPI ACKs that enter the unlocked `list_for_each_entry()`. It can also deterministically widen the window by opening many contexts and by forcing the 2000 ms `scp_ipi_send()` ACK timeout so late ACKs arrive after the context was freed.\\nPR:L - `fops_vcodec_open()` enforces no capability check; any local user with access to the `/dev/video*` node (video group, and the sandboxed media/GPU processes on ChromeOS and Android that routinely hold it) can reach it. No root or CAP_* privilege is needed.\\nUI:N - The attacking process performs every step itself \\u2014 opening the decoder, submitting a bitstream, and closing the fd concurrently. No victim action or interaction is required.\\nS:U - The corruption and the vulnerable code are both in the kernel\u0027s own security authority; the SCP co-processor merely delivers the IPI that triggers it. No VM, IOMMU, or sandbox boundary is crossed.\\nC:H - The unlocked traversal reads `ctx-\u003elist.next` and `ctx-\u003evpu_inst` out of a `mtk_vcodec_dec_ctx` that was just `kfree()`d, a use-after-free read of a reallocatable slab object. Heap grooming lets the attacker supply the link pointer, turning the loop into a controlled-address dereference usable for kernel memory disclosure.\\nI:H - Because the staleness guard is racy, `vpu_dec_ipi_handler()` proceeds against a freed `vdec_vpu_inst` (freed with its containing `vdec_h264_inst`/`vdec_vp9_inst` in `fops_vcodec_release()`), writing `vpu-\u003efailure`, `vpu-\u003esignaled`, and on INIT_ACK `vpu-\u003evsi`/`vpu-\u003einst_addr`/`vpu-\u003einst_id` into memory that may already be reallocated. That is a use-after-free write at fixed offsets, exploitable for cross-object corruption and control-flow hijack.\\nA:H - The commit records a reproduced fatal oops in `vpu_dec_ipi_handler+0x58` ending in \\\"Kernel panic - not syncing: Oops: Fatal exception\\\" with secondary CPUs stopped. Any local user able to open the decoder node can trigger this repeatedly for a full system crash.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"655b86e52eacdce79c2e02c5ec7258a97fcc2e4a\", \"lessThan\": \"0a2dc707aa42214f9c4827bd57e344e29a0841d6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"655b86e52eacdce79c2e02c5ec7258a97fcc2e4a\", \"lessThan\": \"23aaf824121055ba81b55f75444355bd83c8eb38\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"655b86e52eacdce79c2e02c5ec7258a97fcc2e4a\", \"lessThan\": \"6467cda18c9f9b5f2f9a0aa1e2861c653e41f382\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c\", \"drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c\", \"drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h\", \"drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.27\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c\", \"drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c\", \"drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h\", \"drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/0a2dc707aa42214f9c4827bd57e344e29a0841d6\"}, {\"url\": \"https://git.kernel.org/stable/c/23aaf824121055ba81b55f75444355bd83c8eb38\"}, {\"url\": \"https://git.kernel.org/stable/c/6467cda18c9f9b5f2f9a0aa1e2861c653e41f382\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmedia: mediatek: vcodec: adding lock to protect decoder context list\\n\\nAdd a lock for the ctx_list, to avoid accessing a NULL pointer\\nwithin the \u0027vpu_dec_ipi_handler\u0027 function when the ctx_list has\\nbeen deleted due to an unexpected behavior on the SCP IP block.\\n\\nHardware name: Google juniper sku16 board (DT)\\npstate: 20400005 (nzCv daif +PAN -UAO -TCO BTYPE=--)\\npc : vpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec]\\nlr : scp_ipi_handler+0xd0/0x194 [mtk_scp]\\nsp : ffffffc0131dbbd0\\nx29: ffffffc0131dbbd0 x28: 0000000000000000\\nx27: ffffff9bb277f348 x26: ffffff9bb242ad00\\nx25: ffffffd2d440d3b8 x24: ffffffd2a13ff1d4\\nx23: ffffff9bb7fe85a0 x22: ffffffc0133fbdb0\\nx21: 0000000000000010 x20: ffffff9b050ea328\\nx19: ffffffc0131dbc08 x18: 0000000000001000\\nx17: 0000000000000000 x16: ffffffd2d461c6e0\\nx15: 0000000000000242 x14: 000000000000018f\\nx13: 000000000000004d x12: 0000000000000000\\nx11: 0000000000000001 x10: fffffffffffffff0\\nx9 : ffffff9bb6e793a8 x8 : 0000000000000000\\nx7 : 0000000000000000 x6 : 000000000000003f\\nx5 : 0000000000000040 x4 : fffffffffffffff0\\nx3 : 0000000000000020 x2 : ffffff9bb6e79080\\nx1 : 0000000000000010 x0 : ffffffc0131dbc08\\nCall trace:\\nvpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec (HASH:6c3f 2)]\\nscp_ipi_handler+0xd0/0x194 [mtk_scp (HASH:7046 3)]\\nmt8183_scp_irq_handler+0x44/0x88 [mtk_scp (HASH:7046 3)]\\nscp_irq_handler+0x48/0x90 [mtk_scp (HASH:7046 3)]\\nirq_thread_fn+0x38/0x94\\nirq_thread+0x100/0x1c0\\nkthread+0x140/0x1fc\\nret_from_fork+0x10/0x30\\nCode: 54000088 f94ca50a eb14015f 54000060 (f9400108)\\n---[ end trace ace43ce36cbd5c93 ]---\\nKernel panic - not syncing: Oops: Fatal exception\\nSMP: stopping secondary CPUs\\nKernel Offset: 0x12c4000000 from 0xffffffc010000000\\nPHYS_OFFSET: 0xffffffe580000000\\nCPU features: 0x08240002,2188200c\\nMemory Limit: none\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.27\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.6\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"6.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:30:59.577Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2024-35920\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:30:59.577Z\", \"dateReserved\": \"2024-05-17T13:50:33.124Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-19T10:10:32.379Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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