CVE-2022-48755

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-48755
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48755.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-48755
Related
Published
2024-06-20T12:15:13Z
Modified
2024-09-11T04:57:01.632538Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

powerpc64/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06

Johan reported the below crash with test_bpf on ppc64 e5500:

testbpf: #296 ALUENDFROMLE 64: 0x0123456789abcdef -> 0x67452301 jited:1 Oops: Exception in kernel mode, sig: 4 [#1] BE PAGESIZE=4K SMP NRCPUS=24 QEMU e500 Modules linked in: testbpf(+) CPU: 0 PID: 76 Comm: insmod Not tainted 5.14.0-03771-g98c2059e008a-dirty #1 NIP: 8000000000061c3c LR: 80000000006dea64 CTR: 8000000000061c18 REGS: c0000000032d3420 TRAP: 0700 Not tainted (5.14.0-03771-g98c2059e008a-dirty) MSR: 0000000080089000 <EE,ME> CR: 88002822 XER: 20000000 IRQMASK: 0 <...> NIP [8000000000061c3c] 0x8000000000061c3c LR [80000000006dea64] .runone+0x104/0x17c [testbpf] Call Trace: .runone+0x60/0x17c [testbpf] (unreliable) .testbpfinit+0x6a8/0xdc8 [testbpf] .dooneinitcall+0x6c/0x28c .doinitmodule+0x68/0x28c .loadmodule+0x2460/0x2abc .dosysinitmodule+0x120/0x18c .systemcallexception+0x110/0x1b8 systemcallcommon+0xf0/0x210 --- interrupt: c00 at 0x101d0acc <...> ---[ end trace 47b2bf19090bb3d0 ]---

Illegal instruction

The illegal instruction turned out to be 'ldbrx' emitted for BPFFROM[L|B]E, which was only introduced in ISA v2.06. Guard use of the same and implement an alternative approach for older processors.

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.103-1

Affected versions

5.*

5.10.46-4
5.10.46-5
5.10.70-1~bpo10+1
5.10.70-1
5.10.84-1
5.10.92-1~bpo10+1
5.10.92-1
5.10.92-2
5.10.103-1~bpo10+1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.16.7-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.16.7-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}