CVE-2024-35849

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Source
https://nvd.nist.gov/vuln/detail/CVE-2024-35849
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-35849.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-35849
Related
Published
2024-05-17T15:15:21Z
Modified
2024-09-11T05:04:03.612636Z
Summary
[none]
Details

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

btrfs: fix information leak in btrfsioctllogicaltoino()

Syzbot reported the following information leak for in btrfsioctllogicaltoino():

BUG: KMSAN: kernel-infoleak in instrumentcopytouser include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in _copytouser+0xbc/0x110 lib/usercopy.c:40 instrumentcopytouser include/linux/instrumented.h:114 [inline] copytouser+0xbc/0x110 lib/usercopy.c:40 copytouser include/linux/uaccess.h:191 [inline] btrfsioctllogicaltoino+0x440/0x750 fs/btrfs/ioctl.c:3499 btrfsioctl+0x714/0x1260 vfsioctl fs/ioctl.c:51 [inline] _dosysioctl fs/ioctl.c:904 [inline] _sesysioctl+0x261/0x450 fs/ioctl.c:890 _x64sysioctl+0x96/0xe0 fs/ioctl.c:890 x64syscall+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls64.h:17 dosyscallx64 arch/x86/entry/common.c:52 [inline] dosyscall64+0xcf/0x1e0 arch/x86/entry/common.c:83 entrySYSCALL64after_hwframe+0x77/0x7f

Uninit was created at: _kmalloclargenode+0x231/0x370 mm/slub.c:3921 _dokmallocnode mm/slub.c:3954 [inline] _kmallocnode+0xb07/0x1060 mm/slub.c:3973 kmallocnode include/linux/slab.h:648 [inline] kvmallocnode+0xc0/0x2d0 mm/util.c:634 kvmalloc include/linux/slab.h:766 [inline] initdatacontainer+0x49/0x1e0 fs/btrfs/backref.c:2779 btrfsioctllogicaltoino+0x17c/0x750 fs/btrfs/ioctl.c:3480 btrfsioctl+0x714/0x1260 vfsioctl fs/ioctl.c:51 [inline] _dosysioctl fs/ioctl.c:904 [inline] _sesysioctl+0x261/0x450 fs/ioctl.c:890 _x64sysioctl+0x96/0xe0 fs/ioctl.c:890 x64syscall+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls64.h:17 dosyscallx64 arch/x86/entry/common.c:52 [inline] dosyscall64+0xcf/0x1e0 arch/x86/entry/common.c:83 entrySYSCALL64afterhwframe+0x77/0x7f

Bytes 40-65535 of 65536 are uninitialized Memory access of size 65536 starts at ffff888045a40000

This happens, because we're copying a 'struct btrfsdatacontainer' back to user-space. This btrfsdatacontainer is allocated in 'initdatacontainer()' via kvmalloc(), which does not zero-fill the memory.

Fix this by using kvzalloc() which zeroes out the memory on allocation.

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
5.10.216-1

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
5.10.103-1
5.10.106-1
5.10.113-1
5.10.120-1~bpo10+1
5.10.120-1
5.10.127-1
5.10.127-2~bpo10+1
5.10.127-2
5.10.136-1
5.10.140-1
5.10.148-1
5.10.149-1
5.10.149-2
5.10.158-1
5.10.158-2
5.10.162-1
5.10.178-1
5.10.178-2
5.10.178-3
5.10.179-1
5.10.179-2
5.10.179-3
5.10.179-4
5.10.179-5
5.10.191-1
5.10.197-1
5.10.205-1
5.10.205-2
5.10.209-1
5.10.209-2

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
6.1.90-1

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+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
6.8.9-1

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+1
6.1.90-1
6.1.94-1~bpo11+1
6.1.94-1
6.1.98-1
6.1.99-1
6.1.106-1
6.1.106-2
6.1.106-3
6.3.1-1~exp1
6.3.2-1~exp1
6.3.4-1~exp1
6.3.5-1~exp1
6.3.7-1~bpo12+1
6.3.7-1
6.3.11-1
6.4~rc6-1~exp1
6.4~rc7-1~exp1
6.4.1-1~exp1
6.4.4-1~bpo12+1
6.4.4-1
6.4.4-2
6.4.4-3~bpo12+1
6.4.4-3
6.4.11-1
6.4.13-1
6.5~rc4-1~exp1
6.5~rc6-1~exp1
6.5~rc7-1~exp1
6.5.1-1~exp1
6.5.3-1~bpo12+1
6.5.3-1
6.5.6-1
6.5.8-1
6.5.10-1~bpo12+1
6.5.10-1
6.5.13-1
6.6.3-1~exp1
6.6.4-1~exp1
6.6.7-1~exp1
6.6.8-1
6.6.9-1
6.6.11-1
6.6.13-1~bpo12+1
6.6.13-1
6.6.15-1
6.6.15-2
6.7-1~exp1
6.7.1-1~exp1
6.7.4-1~exp1
6.7.7-1
6.7.9-1
6.7.9-2
6.7.12-1~bpo12+1
6.7.12-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}