CVE-2024-34777: dma-mapping: benchmark: fix node id validation
In the Linux kernel, the following vulnerability has been resolved:
dma-mapping: benchmark: fix node id validation
While validating node ids in mapbenchmarkioctl(), nodepossible() may be provided with invalid argument outside of [0,MAXNUMNODES-1] range leading to:
BUG: KASAN: wild-memory-access in mapbenchmarkioctl (kernel/dma/mapbenchmark.c:214) Read of size 8 at addr 1fffffff8ccb6398 by task dmamapbenchma/971 CPU: 7 PID: 971 Comm: dmamapbenchma Not tainted 6.9.0-rc6 #37 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) Call Trace: <TASK> dumpstacklvl (lib/dumpstack.c:117) kasanreport (mm/kasan/report.c:603) kasancheckrange (mm/kasan/generic.c:189) variabletestbit (arch/x86/include/asm/bitops.h:227) [inline] archtestbit (arch/x86/include/asm/bitops.h:239) [inline] testbit at (include/asm-generic/bitops/instrumented-non-atomic.h:142) [inline] nodestate (include/linux/nodemask.h:423) [inline] mapbenchmarkioctl (kernel/dma/mapbenchmark.c:214) fullproxyunlockedioctl (fs/debugfs/file.c:333) x64sysioctl (fs/ioctl.c:890) dosyscall64 (arch/x86/entry/common.c:83) entrySYSCALL64afterhwframe (arch/x86/entry/entry64.S:130)
Compare node ids with sane bounds first. NUMANONODE is considered a special valid case meaning that benchmarking kthreads won't be bound to a cpuset of a given node.
Found by Linux Verification Center (linuxtesting.org).
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2024-34777?
CVE-2024-34777 is classified as a moderate severity vulnerability in the Linux kernel.
How do I fix CVE-2024-34777?
To address CVE-2024-34777, update the Linux kernel to versions 5.10.223-1, 5.10.226-1, 6.1.123-1, 6.1.119-1, 6.12.11-1, or 6.12.12-1.
What types of systems are affected by CVE-2024-34777?
CVE-2024-34777 affects systems using specific versions of the Linux kernel, particularly Debian-based distributions.
What does the vulnerability CVE-2024-34777 involve?
CVE-2024-34777 involves improper validation of node IDs in the dma-mapping component of the Linux kernel.
Is CVE-2024-34777 exploitable through remote attacks?
CVE-2024-34777 requires local access to the system for exploitation, making remote attacks unlikely.