CVE-2023-52464

Summary

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

EDAC/thunderx: Fix possible out-of-bounds string access

Enabling -Wstringop-overflow globally exposes a warning for a common bug in the usage of strncat():

drivers/edac/thunderx_edac.c: In function 'thunderx_ocx_com_threaded_isr': drivers/edac/thunderx_edac.c:1136:17: error: 'strncat' specified bound 1024 equals destination size [-Werror=stringop-overflow=] 1136 | strncat(msg, other, OCX_MESSAGE_SIZE); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ … 1145 | strncat(msg, other, OCX_MESSAGE_SIZE); … 1150 | strncat(msg, other, OCX_MESSAGE_SIZE);

…

Apparently the author of this driver expected strncat() to behave the way that strlcat() does, which uses the size of the destination buffer as its third argument rather than the length of the source buffer. The result is that there is no check on the size of the allocated buffer.

Change it to strlcat().

[ bp: Trim compiler output, fixup commit message. ]

Affected Software

VendorProductVersion RangeStatus
LinuxLinux41003396f932d7f027725c7acebb6a7caa41dc3e < 71c17ee02538802ceafc830f0736aa35b564e601affected
LinuxLinux41003396f932d7f027725c7acebb6a7caa41dc3e < 5da3b6e7196f0b4f3728e4e25eb20233a9ddfaf6affected
LinuxLinux41003396f932d7f027725c7acebb6a7caa41dc3e < 6aa7865ba7ff7f0ede0035180fb3b9400ceb405aaffected
LinuxLinux41003396f932d7f027725c7acebb6a7caa41dc3e < 700cf4bead80fac994dcc43ae1ca5d86d8959b21affected
LinuxLinux41003396f932d7f027725c7acebb6a7caa41dc3e < 9dbac9fdae6e3b411fc4c3fca3bf48f70609c398affected
LinuxLinux41003396f932d7f027725c7acebb6a7caa41dc3e < e1c86511241588efffaa49556196f09a498d5057affected
LinuxLinux41003396f932d7f027725c7acebb6a7caa41dc3e < 426fae93c01dffa379225eb2bd4d3cdc42c6eec5affected
LinuxLinux41003396f932d7f027725c7acebb6a7caa41dc3e < 475c58e1a471e9b873e3e39958c64a2d278275c8affected
LinuxLinux4.12affected
LinuxLinux0 < 4.12unaffected
LinuxLinux4.19.306 <= 4.19.*unaffected
LinuxLinux5.4.268 <= 5.4.*unaffected
LinuxLinux5.10.209 <= 5.10.*unaffected
LinuxLinux5.15.148 <= 5.15.*unaffected
LinuxLinux6.1.75 <= 6.1.*unaffected
LinuxLinux6.6.14 <= 6.6.*unaffected
LinuxLinux6.7.2 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References