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CVE-2026-68479— Bluetooth: btrtl: validate firmware patch bounds

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，该漏洞源于对蓝牙btrtl固件补丁的边界验证不足，可能导致整数下溢和算术溢出，从而造成越界读取和写入。

CVSS 7.8 · High EPSS 0.16% · P6

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux db33c77dddc2ed2cff3061d0b096a9f5ab0c3647< 39e01b4addfbbe177567d6ed1dfb81f9cccb19e6 affected
db33c77dddc2ed2cff3061d0b096a9f5ab0c3647< bda3c598ade6ea03884074b91e31608326684921 affected
db33c77dddc2ed2cff3061d0b096a9f5ab0c3647< a4cb830e0b55ac76c849fd7840afb251f4c028fa affected
db33c77dddc2ed2cff3061d0b096a9f5ab0c3647< 68c5a2a19987c035eb129e627e579adafb04f637 affected
db33c77dddc2ed2cff3061d0b096a9f5ab0c3647< 83534891c058ed71e251135072640911670869aa affected
db33c77dddc2ed2cff3061d0b096a9f5ab0c3647< 6744ab60dfac55d1df5733960aad5be300984301 affected
db33c77dddc2ed2cff3061d0b096a9f5ab0c3647< f1ca750c0510bdbb504bf084d2f196ef2af92ea6 affected
db33c77dddc2ed2cff3061d0b096a9f5ab0c3647< 609c5b04a28dc1b0f3af6a7bc93055135b2d2059 affected
… +10 more rows
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I. Basic Information for CVE-2026-68479

Vulnerability Information
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Vulnerability Title
Bluetooth: btrtl: validate firmware patch bounds
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btrtl: validate firmware patch bounds rtlbt_parse_firmware() copies patch_length - 4 bytes before appending the firmware version. A malformed firmware patch shorter than the version field can make this subtraction underflow and turn the copy into an oversized read and write during Bluetooth setup. The existing patch_offset + patch_length check can also wrap on 32-bit architectures. Validate the patch length and range without arithmetic overflow before allocating or copying the patch.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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，该漏洞源于对蓝牙btrtl固件补丁的边界验证不足，可能导致整数下溢和算术溢出，从而造成越界读取和写入。
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 db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 ~ 39e01b4addfbbe177567d6ed1dfb81f9cccb19e6 -
Linux Linux 4.2 -

II. Public POCs for CVE-2026-68479

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III. Intelligence Information for CVE-2026-68479

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Patches & Fixes for CVE-2026-68479 (8)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
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-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72451 9.8 CRITICAL xfrm: Fix xfrm state cache insertion race
CVE-2026-72323 9.8 CRITICAL ipv4: igmp: Fix potential UAF in igmp_gq_start_timer()
CVE-2026-72322 9.8 CRITICAL ipv6: mcast: Fix potential UAF in MLD delayed work
CVE-2026-72436 9.8 CRITICAL netfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types
CVE-2026-72129 9.8 CRITICAL nvmet-rdma: handle inline data with a nonzero offset
CVE-2026-72130 9.8 CRITICAL nvmet-auth: reject short AUTH_RECEIVE buffers
CVE-2026-72206 9.8 CRITICAL ntfs: validate index block header more strictly
CVE-2026-74384 9.8 CRITICAL nvme-multipath: fix flex array size in struct nvme_ns_head
CVE-2026-72319 9.8 CRITICAL ipvs: ensure inner headers in ICMP errors are in headroom
CVE-2026-72317 9.8 CRITICAL SUNRPC: pin upper rpc_clnt across the TLS connect_worker
CVE-2026-72137 9.8 CRITICAL xfrm: nat_keepalive: avoid double free on send error
CVE-2026-74433 9.8 CRITICAL rxrpc: Fix UAF in rxgk_issue_challenge()

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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