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CVE-2022-48945— media: vivid: fix compose size exceed boundary

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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于无法处理地址的页面错误，导致边界超出。

CVSS 7.8 · High EPSS 0.22% · P11

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux ef834f7836ec0502f49f20bbc42f1240577a9c83< 8c0ee15d9a102c732d0745566d254040085d5663 affected
ef834f7836ec0502f49f20bbc42f1240577a9c83< 5edc3604151919da8da0fb092b71d7dce07d848a affected
ef834f7836ec0502f49f20bbc42f1240577a9c83< 9c7fba9503b826f0c061d136f8f0c9f953ed18b9 affected
ef834f7836ec0502f49f20bbc42f1240577a9c83< 54f259906039dbfe46c550011409fa16f72370f6 affected
ef834f7836ec0502f49f20bbc42f1240577a9c83< f9d19f3a044ca651b0be52a4bf951ffe74259b9f affected
ef834f7836ec0502f49f20bbc42f1240577a9c83< ab54081a2843aefb837812fac5488cc8f1696142 affected
ef834f7836ec0502f49f20bbc42f1240577a9c83< ccb5392c4fea0e7d9f7ab35567e839d74cb3998b affected
ef834f7836ec0502f49f20bbc42f1240577a9c83< 2f558c5208b0f70c8140e08ce09fcc84da48e789 affected
… +12 more rows
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I. Basic Information for CVE-2022-48945

Vulnerability Information
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Vulnerability Title
media: vivid: fix compose size exceed boundary
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: vivid: fix compose size exceed boundary syzkaller found a bug: BUG: unable to handle page fault for address: ffffc9000a3b1000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 100000067 P4D 100000067 PUD 10015f067 PMD 1121ca067 PTE 0 Oops: 0002 [#1] PREEMPT SMP CPU: 0 PID: 23489 Comm: vivid-000-vid-c Not tainted 6.1.0-rc1+ #512 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:memcpy_erms+0x6/0x10 [...] Call Trace: <TASK> ? tpg_fill_plane_buffer+0x856/0x15b0 vivid_fillbuff+0x8ac/0x1110 vivid_thread_vid_cap_tick+0x361/0xc90 vivid_thread_vid_cap+0x21a/0x3a0 kthread+0x143/0x180 ret_from_fork+0x1f/0x30 </TASK> This is because we forget to check boundary after adjust compose->height int V4L2_SEL_TGT_CROP case. Add v4l2_rect_map_inside() to fix this problem for this case.
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于无法处理地址的页面错误，导致边界超出。
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 ef834f7836ec0502f49f20bbc42f1240577a9c83 ~ 8c0ee15d9a102c732d0745566d254040085d5663 -
Linux Linux 3.18 -

II. Public POCs for CVE-2022-48945

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III. Intelligence Information for CVE-2022-48945

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Patches & Fixes for CVE-2022-48945 (8)

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-48945

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