CVE-2024-38576
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.26% probability · 17th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-120
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3758f7d9917bd7ef0482c4184c0ad673b4c4e069Patch
- https://git.kernel.org/stable/c/4c3e2ef4d8ddd313c8ce3ac30505940bea8d6257Patch
- https://git.kernel.org/stable/c/9351e1338539cb7f319ffc1210fa9b2aa27384b5Patch
- https://git.kernel.org/stable/c/afb39909bfb5c08111f99e21bf5be7505f59ff1cPatch
- https://git.kernel.org/stable/c/e2228ed3fe7aa838fba87c79a76fb1ad9ea47138Patch
- https://git.kernel.org/stable/c/3758f7d9917bd7ef0482c4184c0ad673b4c4e069Patch
- https://git.kernel.org/stable/c/4c3e2ef4d8ddd313c8ce3ac30505940bea8d6257Patch
- https://git.kernel.org/stable/c/9351e1338539cb7f319ffc1210fa9b2aa27384b5Patch
- https://git.kernel.org/stable/c/afb39909bfb5c08111f99e21bf5be7505f59ff1cPatch
- https://git.kernel.org/stable/c/e2228ed3fe7aa838fba87c79a76fb1ad9ea47138Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.