CVE-2024-38576

Summary

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

rcu: Fix buffer overflow in print_cpu_stall_info()

The rcuc-starvation output from print_cpu_stall_info() might overflow the buffer if there is a huge difference in jiffies difference. The situation might seem improbable, but computers sometimes get very confused about time, which can result in full-sized integers, and, in this case, buffer overflow.

Also, the unsigned jiffies difference is printed using %ld, which is normally for signed integers. This is intentional for debugging purposes, but it is not obvious from the code.

This commit therefore changes sprintf() to snprintf() and adds a clarifying comment about intention of %ld format.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux245a62982502255314b63dd2c4daaedd1cd595a6 < e2228ed3fe7aa838fba87c79a76fb1ad9ea47138affected
LinuxLinux245a62982502255314b63dd2c4daaedd1cd595a6 < afb39909bfb5c08111f99e21bf5be7505f59ff1caffected
LinuxLinux245a62982502255314b63dd2c4daaedd1cd595a6 < 9351e1338539cb7f319ffc1210fa9b2aa27384b5affected
LinuxLinux245a62982502255314b63dd2c4daaedd1cd595a6 < 4c3e2ef4d8ddd313c8ce3ac30505940bea8d6257affected
LinuxLinux245a62982502255314b63dd2c4daaedd1cd595a6 < 3758f7d9917bd7ef0482c4184c0ad673b4c4e069affected
LinuxLinux6.0affected
LinuxLinux0 < 6.0unaffected
LinuxLinux6.1.93 <= 6.1.*unaffected
LinuxLinux6.6.33 <= 6.6.*unaffected
LinuxLinux6.8.12 <= 6.8.*unaffected
LinuxLinux6.9.3 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References