cbcvebase.
CVE-2022-49464
published 2025-02-26

CVE-2022-49464: 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: […

PriorityP340high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.26%
17.6th percentile
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 z_erofs_shifted_transform+0x2bd/0x370 [ 46.960430] Read of size 4074 at addr ffff8880300c2f8e by task fssum/188 ... [ 46.960430] Call Trace: [ 46.960430] [ 46.960430] dump_stack_lvl+0x41/0x5e [ 46.960430] print_report.cold+0xb2/0x6b7 [ 46.960430] ? z_erofs_shifted_transform+0x2bd/0x370 [ 46.960430] kasan_report+0x8a/0x140 [ 46.960430] ? z_erofs_shifted_transform+0x2bd/0x370 [ 46.960430] kasan_check_range+0x14d/0x1d0 [ 46.960430] memcpy+0x20/0x60 [ 46.960430] z_erofs_shifted_transform+0x2bd/0x370 [ 46.960430] z_erofs_decompress_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``.

Affected

10 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 5.18.5-1 (bookworm)linux 5.18.5-1 (bookworm)
linuxlinux——
linuxlinux>= ab749badf9f41f32509cd103391b81ea7e684b76 < 4d53a625f29074e7b8236c2c0e0922edb7608df94d53a625f29074e7b8236c2c0e0922edb7608df9
linuxlinux>= ab749badf9f41f32509cd103391b81ea7e684b76 < 6b59e1907f58cf877c563dcf013159eb9f994b646b59e1907f58cf877c563dcf013159eb9f994b64
linuxlinux>= ab749badf9f41f32509cd103391b81ea7e684b76 < dcbe6803fffd387f72b48c2373b5f5ed12a5804bdcbe6803fffd387f72b48c2373b5f5ed12a5804b
linuxlinux_kernel>= 0 < 5.18.5-15.18.5-1
linuxlinux_kernel>= 0 < 5.18.5-15.18.5-1
linuxlinux_kernel>= 0 < 5.18.5-15.18.5-1
linuxlinux_kernel>= 5.17 < 5.17.145.17.14
linuxlinux_kernel>= 5.18 < 5.18.35.18.3

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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