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CVE-2026-74320— fbdev: sm501fb: Fix buffer errors in OF binding code

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于sm501fb驱动在OF绑定代码中获取帧缓冲模式时存在释放后重用、缓冲区溢出和内存泄漏问题。

AI Predicted 5.6 Difficulty: Hard EPSS 0.22% · P12

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 4295f9bf74a885da390abc49a3b42a011c1bb890< 0bc3d909a49e1fd8b8c3f2160d526e672c40621d affected
4295f9bf74a885da390abc49a3b42a011c1bb890< 47008d59c60ed896085da95f8d4dd40e1677dd3a affected
4295f9bf74a885da390abc49a3b42a011c1bb890< d374f76e1257ecc5d691a765c512ed2c29a44741 affected
4295f9bf74a885da390abc49a3b42a011c1bb890< b2ff450f7f5cfc7143cab57c3ad70293ba8b822a affected
4295f9bf74a885da390abc49a3b42a011c1bb890< 9057e3f5db39f0ef0dac2f59f2bc59bf17e36c31 affected
4295f9bf74a885da390abc49a3b42a011c1bb890< de590cdf7efec8a0b6da90ae2ab5fc5df26810b9 affected
4295f9bf74a885da390abc49a3b42a011c1bb890< 48cf0f4c6581ec90104cec9c5bf794a8bf347e30 affected
4295f9bf74a885da390abc49a3b42a011c1bb890< d8421e09382cfe0bd2a044c8b0a822f64855dd4e affected
… +10 more rows
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I. Basic Information for CVE-2026-74320

Vulnerability Information
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Vulnerability Title
fbdev: sm501fb: Fix buffer errors in OF binding code
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fbdev: sm501fb: Fix buffer errors in OF binding code The code that gets the frame buffer mode from OF has 'use after free', 'buffer overrun' and memory leaks. info->edid_data isn't free if the probe functions fail or if pd->def_mode is set. If both the CRT and PANEL are enabled info->edid_data is used after being freed and is freed twice. The string returned by of_get_property(np, "mode", &len) is just written over either the static "640x480-16@60" or the module parameter string without any regard for the length (which is most likely longer). Use kstrump() for the OF mode and free everything before freeing 'info.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于sm501fb驱动在OF绑定代码中获取帧缓冲模式时存在释放后重用、缓冲区溢出和内存泄漏问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 4295f9bf74a885da390abc49a3b42a011c1bb890 ~ 0bc3d909a49e1fd8b8c3f2160d526e672c40621d -
Linux Linux 2.6.39 -

II. Public POCs for CVE-2026-74320

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III. Intelligence Information for CVE-2026-74320

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Patches & Fixes for CVE-2026-74320 (8)

Same Patch Batch · Linux · 2026-08-15 · 844 CVEs total

CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72319 9.8 CRITICAL ipvs: ensure inner headers in ICMP errors are in headroom
CVE-2026-72220 9.8 CRITICAL sunrpc: harden rq_procinfo lifecycle to prevent double-free
CVE-2026-72217 9.8 CRITICAL SUNRPC: Bound-check xdr_buf_to_bvec() stores before writing
CVE-2026-74384 9.8 CRITICAL nvme-multipath: fix flex array size in struct nvme_ns_head
CVE-2026-72299 9.8 CRITICAL tipc: restrict socket queue dumps in enqueue tracepoints
CVE-2026-72210 9.8 CRITICAL ntfs: fix off-by-one in mapping pairs decoding bounds checks
CVE-2026-72211 9.8 CRITICAL ntfs: grow index root value before reparent header update
CVE-2026-72317 9.8 CRITICAL SUNRPC: pin upper rpc_clnt across the TLS connect_worker
CVE-2026-72209 9.8 CRITICAL ntfs: validate attribute values on lookup
CVE-2026-74268 9.8 CRITICAL tcp: clear sock_ops cb flags before force-closing a child socket
CVE-2026-72207 9.8 CRITICAL ntfs: not change 0-byte $DATA attribute to non-resident
CVE-2026-74267 9.8 CRITICAL net/sched: sch_codel: Do not call qdisc_tree_reduce_backlog during peek before restoring q

Showing top 20 of 844 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74320

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