CVE-2022-49464
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49464
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49464.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-49464
- Related
- Published
- 2025-02-26T07:01:22Z
- Modified
- 2025-02-27T19:15:44Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
erofs: fix buffer copy overflow of ztailpacking feature
I got some KASAN report as below:
[ 46.959738] ================================================================== [ 46.960430] BUG: KASAN: use-after-free in zerofsshiftedtransform+0x2bd/0x370 [ 46.960430] Read of size 4074 at addr ffff8880300c2f8e by task fssum/188 ... [ 46.960430] Call Trace: [ 46.960430] <TASK> [ 46.960430] dumpstacklvl+0x41/0x5e [ 46.960430] printreport.cold+0xb2/0x6b7 [ 46.960430] ? zerofsshiftedtransform+0x2bd/0x370 [ 46.960430] kasanreport+0x8a/0x140 [ 46.960430] ? zerofsshiftedtransform+0x2bd/0x370 [ 46.960430] kasancheckrange+0x14d/0x1d0 [ 46.960430] memcpy+0x20/0x60 [ 46.960430] zerofsshiftedtransform+0x2bd/0x370 [ 46.960430] zerofsdecompress_pcluster+0xaae/0x1080
The root cause is that the tail pcluster won't be a complete filesystem block anymore. So if ztailpacking is used, the second part of an uncompressed tail pcluster may not be
rq->pageofs_out. - References
Affected packages
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source