cbcvebase.
CVE-2024-26689
published 2024-04-03

CVE-2024-26689: In the Linux kernel, the following vulnerability has been resolved: ceph: prevent use-after-free in encode_cap_msg() In fs/ceph/caps.c, in encode_cap_msg()…

PriorityP337high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.25%
16.1th percentile
In the Linux kernel, the following vulnerability has been resolved: ceph: prevent use-after-free in encode_cap_msg() In fs/ceph/caps.c, in encode_cap_msg(), "use after free" error was caught by KASAN at this line - 'ceph_buffer_get(arg->xattr_buf);'. This implies before the refcount could be increment here, it was freed. In same file, in "handle_cap_grant()" refcount is decremented by this line - 'ceph_buffer_put(ci->i_xattrs.blob);'. It appears that a race occurred and resource was freed by the latter line before the former line could increment it. encode_cap_msg() is called by __send_cap() and __send_cap() is called by ceph_check_caps() after calling __prep_cap(). __prep_cap() is where arg->xattr_buf is assigned to ci->i_xattrs.blob. This is the spot where the refcount must be increased to prevent "use after free" error.

Affected

29 ranges· showing 25
VendorProductVersion rangeFixed in
debiandebian_linux
debianlinux< linux 6.1.82-1 (bookworm)linux 6.1.82-1 (bookworm)
linuxlinux
linuxlinux>= 9030aaf9bf0a1eee47a154c316c789e959638b0f < 8180d0c27b93a6eb60da1b08ea079e39263282148180d0c27b93a6eb60da1b08ea079e3926328214
linuxlinux>= 9030aaf9bf0a1eee47a154c316c789e959638b0f < 70e329b440762390258a6fe8c0de93c9fdd56c7770e329b440762390258a6fe8c0de93c9fdd56c77
linuxlinux>= 9030aaf9bf0a1eee47a154c316c789e959638b0f < f3f98d7d84b31828004545e29fd7262b9f444139f3f98d7d84b31828004545e29fd7262b9f444139
linuxlinux>= 9030aaf9bf0a1eee47a154c316c789e959638b0f < ae20db45e482303a20e56f2db667a9d9c54ac7e7ae20db45e482303a20e56f2db667a9d9c54ac7e7
linuxlinux>= 9030aaf9bf0a1eee47a154c316c789e959638b0f < 7958c1bf5b03c6f1f58e724dbdec93f8f60b96fc7958c1bf5b03c6f1f58e724dbdec93f8f60b96fc
linuxlinux>= 9030aaf9bf0a1eee47a154c316c789e959638b0f < cda4672da1c26835dcbd7aec2bfed954eda9b5efcda4672da1c26835dcbd7aec2bfed954eda9b5ef
linuxlinux_kernel< 5.10.2105.10.210
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.216-15.10.216-1
linuxlinux_kernel>= 0 < 6.1.82-16.1.82-1
linuxlinux_kernel>= 0 < 6.7.7-16.7.7-1
linuxlinux_kernel>= 0 < 6.7.7-16.7.7-1
linuxlinux_kernel>= 0 < 5.4.0-215.2355.4.0-215.235
linuxlinux_kernel>= 0 < 5.15.0-106.1165.15.0-106.116
linuxlinux_kernel>= 0 < 3.13.0-210.2613.13.0-210.261
linuxlinux_kernel>= 0 < 4.4.0-278.3124.4.0-278.312
linuxlinux_kernel>= 0 < 4.4.0-268.3024.4.0-268.302
linuxlinux_kernel>= 0 < 4.15.0-247.2594.15.0-247.259
linuxlinux_kernel>= 0 < 4.15.0-237.2494.15.0-237.249
linuxlinux_kernel>= 0 < 5.4.0-218.2385.4.0-218.238
linuxlinux_kernel>= 0 < 5.15.0-141.1515.15.0-141.151
linuxlinux_kernel>= 0 < 6.8.0-59.616.8.0-59.61

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
vendor_ubuntu7.8HIGH
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