CVE-2023-52578: net: bridge: use DEV_STATS_INC()
In the Linux kernel, the following vulnerability has been resolved:
net: bridge: use DEVSTATSINC()
syzbot/KCSAN reported data-races in brhandleframefinish() [1] This function can run from multiple cpus without mutual exclusion.
Adopt SMP safe DEVSTATSINC() to update dev->stats fields.
Handles updates to dev->stats.txdropped while we are at it.
[1] BUG: KCSAN: data-race in brhandleframefinish / brhandleframefinish
read-write to 0xffff8881374b2178 of 8 bytes by interrupt on cpu 1: brhandleframefinish+0xd4f/0xef0 net/bridge/brinput.c:189 brnfhookthresh+0x1ed/0x220 brnfpreroutingfinishipv6+0x50f/0x540 NFHOOK include/linux/netfilter.h:304 [inline] brnfpreroutingipv6+0x1e3/0x2a0 net/bridge/brnetfilteripv6.c:178 brnfprerouting+0x526/0xba0 net/bridge/brnetfilterhooks.c:508 nfhookentryhookfn include/linux/netfilter.h:144 [inline] nfhookbridgepre net/bridge/brinput.c:272 [inline] brhandleframe+0x4c9/0x940 net/bridge/brinput.c:417 netifreceiveskbcore+0xa8a/0x21e0 net/core/dev.c:5417 netifreceiveskbonecore net/core/dev.c:5521 [inline] netifreceiveskb+0x57/0x1b0 net/core/dev.c:5637 processbacklog+0x21f/0x380 net/core/dev.c:5965 napipoll+0x60/0x3b0 net/core/dev.c:6527 napipoll net/core/dev.c:6594 [inline] netrxaction+0x32b/0x750 net/core/dev.c:6727 dosoftirq+0xc1/0x265 kernel/softirq.c:553 runksoftirqd+0x17/0x20 kernel/softirq.c:921 smpbootthreadfn+0x30a/0x4a0 kernel/smpboot.c:164 kthread+0x1d7/0x210 kernel/kthread.c:388 retfromfork+0x48/0x60 arch/x86/kernel/process.c:147 retfromforkasm+0x11/0x20 arch/x86/entry/entry64.S:304
read-write to 0xffff8881374b2178 of 8 bytes by interrupt on cpu 0: brhandleframefinish+0xd4f/0xef0 net/bridge/brinput.c:189 brnfhookthresh+0x1ed/0x220 brnfpreroutingfinishipv6+0x50f/0x540 NFHOOK include/linux/netfilter.h:304 [inline] brnfpreroutingipv6+0x1e3/0x2a0 net/bridge/brnetfilteripv6.c:178 brnfprerouting+0x526/0xba0 net/bridge/brnetfilterhooks.c:508 nfhookentryhookfn include/linux/netfilter.h:144 [inline] nfhookbridgepre net/bridge/brinput.c:272 [inline] brhandleframe+0x4c9/0x940 net/bridge/brinput.c:417 netifreceiveskbcore+0xa8a/0x21e0 net/core/dev.c:5417 netifreceiveskbonecore net/core/dev.c:5521 [inline] netifreceiveskb+0x57/0x1b0 net/core/dev.c:5637 processbacklog+0x21f/0x380 net/core/dev.c:5965 napipoll+0x60/0x3b0 net/core/dev.c:6527 napipoll net/core/dev.c:6594 [inline] netrxaction+0x32b/0x750 net/core/dev.c:6727 dosoftirq+0xc1/0x265 kernel/softirq.c:553 dosoftirq+0x5e/0x90 kernel/softirq.c:454 localbhenableip+0x64/0x70 kernel/softirq.c:381 rawspinunlockbh include/linux/spinlockapismp.h:167 [inline] rawspinunlockbh+0x36/0x40 kernel/locking/spinlock.c:210 spinunlockbh include/linux/spinlock.h:396 [inline] batadvttlocalpurge+0x1a8/0x1f0 net/batman-adv/translation-table.c:1356 batadvttpurge+0x2b/0x630 net/batman-adv/translation-table.c:3560 processonework kernel/workqueue.c:2630 [inline] processscheduledworks+0x5b8/0xa30 kernel/workqueue.c:2703 workerthread+0x525/0x730 kernel/workqueue.c:2784 kthread+0x1d7/0x210 kernel/kthread.c:388 retfromfork+0x48/0x60 arch/x86/kernel/process.c:147 retfromforkasm+0x11/0x20 arch/x86/entry/entry64.S:304
value changed: 0x00000000000d7190 -> 0x00000000000d7191
Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 14848 Comm: kworker/u4:11 Not tainted 6.6.0-rc1-syzkaller-00236-gad8a69f361b9 #0
Other sources
In the Linux kernel, the following vulnerability has been resolved:
net: bridge: use DEVSTATSINC()
The Linux kernel CVE team has assigned CVE-2023-52578 to this issue.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024030257-CVE-2023-52578-50cb@gregkh/T/#u
— Red Hat
Linux Kernel is vulnerable to a denial of service, caused by an error related to using DEVSTATSINC(). By sending a specially crafted request, a local authenticated attacker could exploit this vulnerability to cause a denial of service.
— IBM
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2023-52578?
CVE-2023-52578 has a high severity rating due to the potential for data races in the Linux kernel.
How do I fix CVE-2023-52578?
To remediate CVE-2023-52578, upgrade to the patched kernel versions provided by your distribution, such as kernel 4.19.296 or 5.4.258 for Red Hat.
Which Linux kernel versions are affected by CVE-2023-52578?
CVE-2023-52578 affects multiple Linux kernel versions up to 6.6, including significant versions like 4.19.x and 5.10.x.
Is CVE-2023-52578 a critical vulnerability?
While not labeled as critical, CVE-2023-52578 poses serious risks as it can allow concurrent execution without mutual exclusion in the kernel.
What components are impacted by CVE-2023-52578?
CVE-2023-52578 specifically impacts the net bridge components in the Linux kernel during frame processing.