CVE-2024-40978: scsi: qedi: Fix crash while reading debugfs attribute
In the Linux kernel, the following vulnerability has been resolved:
scsi: qedi: Fix crash while reading debugfs attribute
The qedidbgdonotrecovercmdread() function invokes sprintf() directly on a user pointer, which results into the crash.
To fix this issue, use a small local stack buffer for sprintf() and then call simplereadfrombuffer(), which in turns make the copytouser() call.
BUG: unable to handle page fault for address: 00007f4801111000 PGD 8000000864df6067 P4D 8000000864df6067 PUD 864df7067 PMD 846028067 PTE 0 Oops: 0002 [#1] PREEMPT SMP PTI Hardware name: HPE ProLiant DL380 Gen10/ProLiant DL380 Gen10, BIOS U30 06/15/2023 RIP: 0010:memcpyorig+0xcd/0x130 RSP: 0018:ffffb7a18c3ffc40 EFLAGS: 00010202 RAX: 00007f4801111000 RBX: 00007f4801111000 RCX: 000000000000000f RDX: 000000000000000f RSI: ffffffffc0bfd7a0 RDI: 00007f4801111000 RBP: ffffffffc0bfd7a0 R08: 725f746f6e5f6f64 R09: 3d7265766f636572 R10: ffffb7a18c3ffd08 R11: 0000000000000000 R12: 00007f4881110fff R13: 000000007fffffff R14: ffffb7a18c3ffca0 R15: ffffffffc0bfd7af FS: 00007f480118a740(0000) GS:ffff98e38af00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4801111000 CR3: 0000000864b8e001 CR4: 00000000007706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> ? diebody+0x1a/0x60 ? pagefaultoops+0x183/0x510 ? excpagefault+0x69/0x150 ? asmexcpagefault+0x22/0x30 ? memcpyorig+0xcd/0x130 vsnprintf+0x102/0x4c0 sprintf+0x51/0x80 qedidbgdonotrecovercmdread+0x2f/0x50 [qedi 6bcfdeeecdea037da47069eca2ba717c84a77324] fullproxyread+0x50/0x80 vfsread+0xa5/0x2e0 ? folioaddnewanonrmap+0x44/0xa0 ? setpteat+0x15/0x30 ? doptemissing+0x426/0x7f0 ksysread+0xa5/0xe0 dosyscall64+0x58/0x80 ? countmemcgevents+0x46/0x90 ? countmemcgeventmm+0x3d/0x60 ? handlemmfault+0x196/0x2f0 ? douseraddrfault+0x267/0x890 ? excpagefault+0x69/0x150 entrySYSCALL64afterhwframe+0x72/0xdc RIP: 0033:0x7f4800f20b4d
Other sources
Linux Kernel is vulnerable to a denial of service, caused by a flaw in Scsi: Qedi. 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-2024-40978?
CVE-2024-40978 has been classified as a critical vulnerability due to its potential to cause crashes in the Linux kernel.
How do I fix CVE-2024-40978?
To fix CVE-2024-40978, update your Linux kernel to one of the following versions: 4.19.317, 5.4.279, 5.10.221, 5.15.162, 6.1.96, 6.6.36, 6.9.7, 6.10 or specific Debian versions.
Which Linux distributions are affected by CVE-2024-40978?
The affected distributions include Red Hat and Debian based systems that use vulnerable versions of the Linux kernel.
What is the impact of CVE-2024-40978?
CVE-2024-40978 can lead to system crashes when the qedi_dbg_do_not_recover_cmd_read() function is called and interacts with user pointers.
When was CVE-2024-40978 disclosed?
CVE-2024-40978 was disclosed as part of the regular updates to the Linux kernel addressing stability and security issues.