CVE-2023-52733

kernel: s390/decompressor: specify __decompress() buf len to avoid overflow

Published May 21, 2024 CVSS 3.1 · 4.4 Medium EPSS n/a KEV · Not listed

Description

This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.

No data.

No data available yet.

No solution or workaround provided in the CVE record

Source	ID	Title
EUVD	EUVD-2023-59452	This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.

No CVSS v4.0

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://lore.kernel.org/linux-cve-announce/2024052159-CVE-2023-52733-601c@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2023-52733
https://www.cve.org/CVERecord?id=CVE-2023-52733

History

Type	Values Removed	Values Added
Weaknesses	CWE-120
CPEs	cpe:2.3:o:linux:linux_kernel:::::::: cpe:2.3:o:linux:linux_kernel:6.2:rc1:::::: cpe:2.3:o:linux:linux_kernel:6.2:rc2:::::: cpe:2.3:o:linux:linux_kernel:6.2:rc3:::::: cpe:2.3:o:linux:linux_kernel:6.2:rc4:::::: cpe:2.3:o:linux:linux_kernel:6.2:rc5:::::: cpe:2.3:o:linux:linux_kernel:6.2:rc6::::::
Vendors & Products	Linux Linux linux Kernel
References	https://git.kernel.org/stable/c/16409f7d9ca5bb8220e1049ea9aae0d3c94d2dfb https://git.kernel.org/stable/c/55dbd6f4ea954751340f4f73d5dcd7c8f12208b2 https://git.kernel.org/stable/c/7ab41c2c08a32132ba8c14624910e2fe8ce4ba4b https://git.kernel.org/stable/c/9ed522143f959630f8b7782ddc212900d8f609a9 https://git.kernel.org/stable/c/f1eb22d0ff064ad458b3b1a1eaa84ac3996206c2
Metrics	cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}`	cvssV3_1 `{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}`

Type	Values Removed	Values Added
Description	In the Linux kernel, the following vulnerability has been resolved: s390/decompressor: specify __decompress() buf len to avoid overflow Historically calls to __decompress() didn't specify "out_len" parameter on many architectures including s390, expecting that no writes beyond uncompressed kernel image are performed. This has changed since commit 2aa14b1ab2c4 ("zstd: import usptream v1.5.2") which includes zstd library commit 6a7ede3dfccb ("Reduce size of dctx by reutilizing dst buffer (#2751)"). Now zstd decompression code might store literal buffer in the unwritten portion of the destination buffer. Since "out_len" is not set, it is considered to be unlimited and hence free to use for optimization needs. On s390 this might corrupt initrd or ipl report which are often placed right after the decompressor buffer. Luckily the size of uncompressed kernel image is already known to the decompressor, so to avoid the problem simply specify it in the "out_len" parameter.	This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
Title	s390/decompressor: specify __decompress() buf len to avoid overflow	kernel: s390/decompressor: specify __decompress() buf len to avoid overflow
CPEs	cpe:2.3:o:linux:linux_kernel:-:::::::*
Metrics	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Type	Values Removed	Values Added
CPEs		cpe:2.3:o:linux:linux_kernel:::::::: cpe:2.3:o:linux:linux_kernel:6.2:rc1:::::: cpe:2.3:o:linux:linux_kernel:6.2:rc2:::::: cpe:2.3:o:linux:linux_kernel:6.2:rc3:::::: cpe:2.3:o:linux:linux_kernel:6.2:rc4:::::: cpe:2.3:o:linux:linux_kernel:6.2:rc5:::::: cpe:2.3:o:linux:linux_kernel:6.2:rc6::::::