CVE-2023-52915

Summary

In the Linux kernel, the following vulnerability has been resolved:

media: dvb-usb-v2: af9035: Fix null-ptr-deref in af9035_i2c_master_xfer

In af9035_i2c_master_xfer, msg is controlled by user. When msg[i].buf is null and msg[i].len is zero, former checks on msg[i].buf would be passed. Malicious data finally reach af9035_i2c_master_xfer. If accessing msg[i].buf[0] without sanity check, null ptr deref would happen. We add check on msg[i].len to prevent crash.

Similar commit: commit 0ed554fd769a ("media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()")

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273 < b2f54ed7739dfdf42c4df0a11131aad7c8635464affected
LinuxLinux7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273 < fa58d9db5cad4bb7bb694b6837e3b96d87554f2baffected
LinuxLinux7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273 < b49c6e5dd236787f13a062ec528d724169f11152affected
LinuxLinux7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273 < 6c01ef65de0b321b2db1ef9abf8f1d15862b937eaffected
LinuxLinux7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273 < d9ef84a7c222497ecb5fdf93361c76931804825eaffected
LinuxLinux7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273 < 0143f282b15f7cedc0392ea10050fb6000fd16e6affected
LinuxLinux7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273 < 41b7181a40af84448a2b144fb02d8bf32b7e9a23affected
LinuxLinux7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273 < 7bf744f2de0a848fb1d717f5831b03db96feae89affected
LinuxLinux3.5affected
LinuxLinux0 < 3.5unaffected
LinuxLinux4.14.326 <= 4.14.*unaffected
LinuxLinux4.19.295 <= 4.19.*unaffected
LinuxLinux5.4.257 <= 5.4.*unaffected
LinuxLinux5.10.197 <= 5.10.*unaffected
LinuxLinux5.15.133 <= 5.15.*unaffected
LinuxLinux6.1.55 <= 6.1.*unaffected
LinuxLinux6.5.5 <= 6.5.*unaffected
LinuxLinux6.6 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References