CVE-2022-48945

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxef834f7836ec0502f49f20bbc42f1240577a9c83 < 8c0ee15d9a102c732d0745566d254040085d5663affected
LinuxLinuxef834f7836ec0502f49f20bbc42f1240577a9c83 < 5edc3604151919da8da0fb092b71d7dce07d848aaffected
LinuxLinuxef834f7836ec0502f49f20bbc42f1240577a9c83 < 9c7fba9503b826f0c061d136f8f0c9f953ed18b9affected
LinuxLinuxef834f7836ec0502f49f20bbc42f1240577a9c83 < 54f259906039dbfe46c550011409fa16f72370f6affected
LinuxLinuxef834f7836ec0502f49f20bbc42f1240577a9c83 < f9d19f3a044ca651b0be52a4bf951ffe74259b9faffected
LinuxLinuxef834f7836ec0502f49f20bbc42f1240577a9c83 < ab54081a2843aefb837812fac5488cc8f1696142affected
LinuxLinuxef834f7836ec0502f49f20bbc42f1240577a9c83 < ccb5392c4fea0e7d9f7ab35567e839d74cb3998baffected
LinuxLinuxef834f7836ec0502f49f20bbc42f1240577a9c83 < 2f558c5208b0f70c8140e08ce09fcc84da48e789affected
LinuxLinuxef834f7836ec0502f49f20bbc42f1240577a9c83 < 94a7ad9283464b75b12516c5512541d467cefcf8affected
LinuxLinux3.18affected
LinuxLinux0 < 3.18unaffected
LinuxLinux4.9.337 <= 4.9.*unaffected
LinuxLinux4.14.303 <= 4.14.*unaffected
LinuxLinux4.19.270 <= 4.19.*unaffected
LinuxLinux5.4.229 <= 5.4.*unaffected
LinuxLinux5.10.163 <= 5.10.*unaffected
LinuxLinux5.15.86 <= 5.15.*unaffected
LinuxLinux6.0.16 <= 6.0.*unaffected
LinuxLinux6.1.2 <= 6.1.*unaffected
LinuxLinux6.2 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References