REDHAT-BUG-2348656: Low severity Linux Kernel vulnerability
In the Linux kernel, the following vulnerability has been resolved:
wifi: brcmfmac: Check the return value of ofpropertyreadstringindex()
Somewhen between 6.10 and 6.11 the driver started to crash on my MacBookPro14,3. The property doesn't exist and 'tmp' remains uninitialized, so we pass a random pointer to devmkstrdup().
The crash I am getting looks like this:
BUG: unable to handle page fault for address: 00007f033c669379 PF: supervisor read access in kernel mode PF: errorcode(0x0001) - permissions violation PGD 8000000101341067 P4D 8000000101341067 PUD 101340067 PMD 1013bb067 PTE 800000010aee9025 Oops: Oops: 0001 [#1] SMP PTI CPU: 4 UID: 0 PID: 827 Comm: (udev-worker) Not tainted 6.11.8-gentoo #1 Hardware name: Apple Inc. MacBookPro14,3/Mac-551B86E5744E2388, BIOS 529.140.2.0.0 06/23/2024 RIP: 0010:strlen+0x4/0x30 Code: f7 75 ec 31 c0 c3 cc cc cc cc 48 89 f8 c3 cc cc cc cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <80> 3f 00 74 14 48 89 f8 48 83 c0 01 80 38 00 75 f7 48 29 f8 c3 cc RSP: 0018:ffffb4aac0683ad8 EFLAGS: 00010202 RAX: 00000000ffffffea RBX: 00007f033c669379 RCX: 0000000000000001 RDX: 0000000000000cc0 RSI: 00007f033c669379 RDI: 00007f033c669379 RBP: 00000000ffffffea R08: 0000000000000000 R09: 00000000c0ba916a R10: ffffffffffffffff R11: ffffffffb61ea260 R12: ffff91f7815b50c8 R13: 0000000000000cc0 R14: ffff91fafefffe30 R15: ffffb4aac0683b30 FS: 00007f033ccbe8c0(0000) GS:ffff91faeed00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f033c669379 CR3: 0000000107b1e004 CR4: 00000000003706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ? die+0x23/0x70 ? pagefaultoops+0x149/0x4c0 ? rawspinrqlocknested+0xe/0x20 ? schedbalancenewidle+0x22b/0x3c0 ? updateloadavg+0x78/0x770 ? excpagefault+0x6f/0x150 ? asmexcpagefault+0x26/0x30 ? pfxpciconf1write+0x10/0x10 ? strlen+0x4/0x30 devmkstrdup+0x25/0x70 brcmfofprobe+0x273/0x350 [brcmfmac]
Affected Software
Event History
Frequently Asked Questions
What is the severity of REDHAT-BUG-2348656?
The severity of REDHAT-BUG-2348656 is classified based on the potential impact on kernel stability and device reliability.
How do I fix REDHAT-BUG-2348656?
To fix REDHAT-BUG-2348656, update your Linux kernel to version 6.11 or later where the vulnerability has been addressed.
What systems are affected by REDHAT-BUG-2348656?
REDHAT-BUG-2348656 affects Linux kernel versions between 6.10 and 6.11, particularly impacting systems using the brcmfmac driver.
What specific issue does REDHAT-BUG-2348656 address?
REDHAT-BUG-2348656 addresses a vulnerability in the brcmfmac Wi-Fi driver related to an uninitialized return value leading to crashes.
Is there a workaround for REDHAT-BUG-2348656?
Currently, the recommended action is to update the kernel, as there are no known safe workarounds for REDHAT-BUG-2348656.