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CVE-2026-53137— drm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size

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基金会开源的操作系统Linux所使用的内核。 Linux kernel 5.6版本存在安全漏洞，该漏洞源于在HDMI HDCP 2.x中继器认证过程中，未将接收到的消息大小限制到缓冲区大小，可能导致恶意HDMI中继器造成越界写入。

AI Predicted 5.9 Difficulty: Hard EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux eff682f83c9c2030761e7536c5d97e1b20f71c15< 3c4444aec06c74fbc05661f370954ac814963c38 affected
eff682f83c9c2030761e7536c5d97e1b20f71c15< 91fb41218c413989d8b6c837748751454b452d68 affected
eff682f83c9c2030761e7536c5d97e1b20f71c15< 964e50ef7b8f09815a7d05b8326af700f8d5bc96 affected
eff682f83c9c2030761e7536c5d97e1b20f71c15< 79e0273272a05fb26f9b1e55bf1a52eefc3b7b35 affected
eff682f83c9c2030761e7536c5d97e1b20f71c15< bfba882cfcd08f6540f72f48e786b6404f5d2c5b affected
eff682f83c9c2030761e7536c5d97e1b20f71c15< 1906064d50d194a145486e5caf3db3e708b6f6ef affected
eff682f83c9c2030761e7536c5d97e1b20f71c15< 98cfb7530ea91d8e5e928285cdce58e1131f6e83 affected
eff682f83c9c2030761e7536c5d97e1b20f71c15< f0f3981c43b32cadfe373d636d9e9ca522bb3702 affected
… +10 more rows
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I. Basic Information for CVE-2026-53137

Vulnerability Information
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Vulnerability Title
drm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size [Why & How] During HDCP 2.x repeater authentication over HDMI, the driver reads the sink's RxStatus register and extracts a 10-bit message size field (max value 1023). This value is used as the read length for the ReceiverID list without being clamped to the size of the destination buffer rx_id_list[177]. A malicious HDMI repeater could advertise a message size larger than the buffer, causing an out-of-bounds write during the I2C read. Clamp the read length in mod_hdcp_read_rx_id_list() to the size of the rx_id_list buffer, matching the approach already used in the DP branch. (cherry picked from commit 229212219e4247d9486f8ba41ef087358490be09)
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基金会开源的操作系统Linux所使用的内核。 Linux kernel 5.6版本存在安全漏洞，该漏洞源于在HDMI HDCP 2.x中继器认证过程中，未将接收到的消息大小限制到缓冲区大小，可能导致恶意HDMI中继器造成越界写入。
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 eff682f83c9c2030761e7536c5d97e1b20f71c15 ~ 3c4444aec06c74fbc05661f370954ac814963c38 -
Linux Linux 5.6 -

II. Public POCs for CVE-2026-53137

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III. Intelligence Information for CVE-2026-53137

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Patches & Fixes for CVE-2026-53137 (7)

Same Patch Batch · Linux · 2026-06-25 · 146 CVEs total

CVE-2026-53247 9.8 CRITICAL net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown
CVE-2026-53215 9.8 CRITICAL net: mvpp2: refill RX buffers before XDP or skb use
CVE-2026-53216 9.8 CRITICAL net: mvpp2: limit XDP frame size to the RX buffer
CVE-2026-53246 9.8 CRITICAL sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing
CVE-2026-53151 9.8 CRITICAL rxrpc: Fix the ACK parser to extract the SACK table for parsing
CVE-2026-53221 9.8 CRITICAL ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()
CVE-2026-53260 9.8 CRITICAL tcp: Add preempt_{disable,enable}_nested() in reqsk_queue_hash_req().
CVE-2026-53175 9.8 CRITICAL inet: frags: fix use-after-free caused by the fqdir_pre_exit() flush
CVE-2026-53176 9.8 CRITICAL IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN
CVE-2026-53228 9.8 CRITICAL ipv6: sit: reload inner IPv6 header after GSO offloads
CVE-2026-53131 9.4 CRITICAL netfilter: require Ethernet MAC header before using eth_hdr()
CVE-2026-53225 9.1 CRITICAL sctp: fix uninit-value in __sctp_rcv_asconf_lookup()
CVE-2026-53224 9.1 CRITICAL sctp: validate embedded INIT chunk and address list lengths in cookie
CVE-2026-53186 9.1 CRITICAL RDMA/srp: bound SRP_RSP sense copy by the received length
CVE-2026-53240 8.8 HIGH xfrm: iptfs: fix use-after-free on first_skb in __input_process_payload
CVE-2026-53170 8.8 HIGH accel/ethosu: reject DMA commands with uninitialized length
CVE-2026-53248 8.8 HIGH net: airoha: Fix use-after-free in metadata dst teardown
CVE-2026-53159 8.8 HIGH misc: fastrpc: fix DMA address corruption due to find_vma misuse
CVE-2026-53200 8.8 HIGH KVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX
CVE-2026-53188 8.8 HIGH RDMA/core: Validate the passed in fops for ib_get_ucaps()

Showing top 20 of 146 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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