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CVE-2026-68107— drm/amdgpu/vcn4: avoid rereading IB param length

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 6.6.148之前版本、6.12.101之前版本、6.18.42之前版本和7.1.6之前版本存在安全漏洞，该漏洞源于drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c中的vcn_v4_0_enc_find_ib_param函数重复读取IB参数长度，可能导致TOCTOU问题。

CVSS 8.8 · High EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux cfdde9197ecd957281507be99af172671a57755c< bbbe6a2a8d8dc87243438d3ffea2083b52d882d9 affected
6dc4eddeb7e6cca7e1ab32cafbda79d06e652d84< ff6aa542d91d76a185f69bd1997b94a560ff5f6b affected
2b10cb58d7a3fd621ec9b2ba765a092e562ef998< bd868c077f67589ed2a714307ceaade5f246e302 affected
2b10cb58d7a3fd621ec9b2ba765a092e562ef998< c309626bf91fa0a0b583575654e6e14e81f818a3 affected
2b10cb58d7a3fd621ec9b2ba765a092e562ef998< 3b4082fabc67c9780b06eb959e59dd92fa79c0f0 affected
b1dc92f55b22a80ded8f0263c9ef4ba902303895 affected
6.6.107< 6.6.148 affected
6.12.48< 6.12.101 affected
… +8 more rows
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I. Basic Information for CVE-2026-68107

Vulnerability Information
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Vulnerability Title
drm/amdgpu/vcn4: avoid rereading IB param length
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn4: avoid rereading IB param length Reuse the parameter length returned by vcn_v4_0_enc_find_ib_param() instead of rereading it from the IB. This avoids a potential TOCTOU issue if the IB contents change between reads. (cherry picked from commit dbb02b4755f8c1f3773263f2d779872c1c0c073a)
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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 6.6.148之前版本、6.12.101之前版本、6.18.42之前版本和7.1.6之前版本存在安全漏洞，该漏洞源于drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c中的vcn_v4_0_enc_find_ib_param函数重复读取IB参数长度，可能导致TOCTOU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 cfdde9197ecd957281507be99af172671a57755c ~ bbbe6a2a8d8dc87243438d3ffea2083b52d882d9 -
Linux Linux 6.17 -

II. Public POCs for CVE-2026-68107

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III. Intelligence Information for CVE-2026-68107

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Patches & Fixes for CVE-2026-68107 (5)

Same Patch Batch · Linux · 2026-08-10 · 344 CVEs total

CVE-2026-68156 9.8 CRITICAL libceph: refresh auth->authorizer_buf{,_len} after authorizer update
CVE-2026-68123 9.8 CRITICAL openvswitch: fix GSO userspace truncation underflow
CVE-2026-68117 9.8 CRITICAL tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-68127 9.8 CRITICAL ila: reload IPv6 header after pskb_may_pull in checksum adjust
CVE-2026-68300 9.8 CRITICAL sctp: auth: verify auth requirement when auth_chunk is NULL
CVE-2026-68136 9.8 CRITICAL net: gro: fix double aggregation of flush-marked skbs
CVE-2026-68137 9.8 CRITICAL net/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-68144 9.8 CRITICAL phonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-68302 9.8 CRITICAL amt: re-read skb header pointers after every pull
CVE-2026-68154 9.8 CRITICAL libceph: reject zero bucket types in crush_decode
CVE-2026-68158 9.8 CRITICAL libceph: Fix multiplication overflow in decode_new_up_state_weight()
CVE-2026-68159 9.8 CRITICAL libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
CVE-2026-68160 9.8 CRITICAL ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-68388 9.8 CRITICAL smb/client: handle overlapping allocated ranges in fallocate
CVE-2026-68170 9.8 CRITICAL mptcp: fix stale skb->sk reference on subflow close
CVE-2026-68385 9.8 CRITICAL s390/checksum: Fix csum_partial() without vector facility
CVE-2026-68426 9.8 CRITICAL xfrm: fix stale skb->prev after async crypto steals a GSO segment
CVE-2026-68381 9.8 CRITICAL ksmbd: pin conn during async oplock break notification
CVE-2026-68161 9.8 CRITICAL sctp: close UDP tunnel sockets during netns teardown
CVE-2026-68124 9.6 CRITICAL mctp: serial: handle zero-length frames to prevent rx buffer overflow

Showing top 20 of 344 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68107

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