CVE-2022-49670: linux/dim: Fix divide by 0 in RDMA DIM
In the Linux kernel, the following vulnerability has been resolved:
linux/dim: Fix divide by 0 in RDMA DIM
Fix a divide 0 error in rdmadimstatscompare() when prev->cperatio == 0.
CallTrace: Hardware name: H3C R4900 G3/RS33M2C9S, BIOS 2.00.37P21 03/12/2020 task: ffff880194b78000 task.stack: ffffc90006714000 RIP: 0010:backportrdmadim+0x10e/0x240 [mlxcompat] RSP: 0018:ffff880c10e83ec0 EFLAGS: 00010202 RAX: 0000000000002710 RBX: ffff88096cd7f780 RCX: 0000000000000064 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000001d7c6c09 R13: ffff88096cd7f780 R14: ffff880b174fe800 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff880c10e80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000a0965b00 CR3: 000000000200a003 CR4: 00000000007606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <IRQ> ibpollhandler+0x43/0x80 [ibcore] irqpollsoftirq+0xae/0x110 dosoftirq+0xd1/0x28c irqexit+0xde/0xf0 doIRQ+0x54/0xe0 commoninterrupt+0x8f/0x8f </IRQ> ? cpuidleenterstate+0xd9/0x2a0 ? cpuidleenterstate+0xc7/0x2a0 ? doidle+0x170/0x1d0 ? cpustartupentry+0x6f/0x80 ? startsecondary+0x1b9/0x210 ? secondarystartup64+0xa5/0xb0 Code: 0f 87 e1 00 00 00 8b 4c 24 14 44 8b 43 14 89 c8 4d 63 c8 44 29 c0 99 31 d0 29 d0 31 d2 48 98 48 8d 04 80 48 8d 04 80 48 c1 e0 02 <49> f7 f1 48 83 f8 0a 0f 86 c1 00 00 00 44 39 c1 7f 10 48 89 df RIP: backportrdmadim+0x10e/0x240 [mlxcompat] RSP: ffff880c10e83ec0
Other sources
In the Linux kernel, the following vulnerability has been resolved:
linux/dim: Fix divide by 0 in RDMA DIM
Fix a divide 0 error in rdmadimstatscompare() when prev-cperatio == 0.
CallTrace: Hardware name: H3C R4900 G3/RS33M2C9S, BIOS 2.00.37P21 03/12/2020 task: ffff880194b78000 task.stack: ffffc90006714000 RIP: 0010:backportrdmadim+0x10e/0x240 [mlxcompat] RSP: 0018:ffff880c10e83ec0 EFLAGS: 00010202 RAX: 0000000000002710 RBX: ffff88096cd7f780 RCX: 0000000000000064 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000001d7c6c09 R13: ffff88096cd7f780 R14: ffff880b174fe800 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff880c10e80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000a0965b00 CR3: 000000000200a003 CR4: 00000000007606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: IRQ ibpollhandler+0x43/0x80 [ibcore] irqpollsoftirq+0xae/0x110 dosoftirq+0xd1/0x28c irqexit+0xde/0xf0 doIRQ+0x54/0xe0 commoninterrupt+0x8f/0x8f /IRQ ? cpuidleenterstate+0xd9/0x2a0 ? cpuidleenterstate+0xc7/0x2a0 ? doidle+0x170/0x1d0 ? cpustartupentry+0x6f/0x80 ? startsecondary+0x1b9/0x210 ? secondarystartup64+0xa5/0xb0 Code: 0f 87 e1 00 00 00 8b 4c 24 14 44 8b 43 14 89 c8 4d 63 c8 44 29 c0 99 31 d0 29 d0 31 d2 48 98 48 8d 04 80 48 8d 04 80 48 c1 e0 02 49 f7 f1 48 83 f8 0a 0f 86 c1 00 00 00 44 39 c1 7f 10 48 89 df RIP: backportrdmadim+0x10e/0x240 [mlxcompat] RSP: ffff880c10e83ec0
— IBM
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2022-49670?
CVE-2022-49670 has a low severity rating due to its specific context and impact.
How do I fix CVE-2022-49670?
To resolve CVE-2022-49670, update your Linux kernel to a version that includes the patch for this vulnerability.
What versions of the Linux kernel are affected by CVE-2022-49670?
CVE-2022-49670 affects Linux kernel versions from 5.3 to 5.19-rc4.
What is the impact of CVE-2022-49670 on systems?
The impact of CVE-2022-49670 could lead to a system crash due to a divide by zero error.
Is CVE-2022-49670 related to RDMA functionality?
Yes, CVE-2022-49670 specifically concerns a divide by zero error in the RDMA DIM module.