FKIE_CVE-2023-34256

Vulnerability from fkie_nvd - Published: 2023-05-31 20:15 - Updated: 2025-03-11 16:15
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
An issue was discovered in the Linux kernel before 6.3.3. There is an out-of-bounds read in crc16 in lib/crc16.c when called from fs/ext4/super.c because ext4_group_desc_csum does not properly check an offset. NOTE: this is disputed by third parties because the kernel is not intended to defend against attackers with the stated "When modifying the block device while it is mounted by the filesystem" access.
References
cve@mitre.orghttps://bugzilla.suse.com/show_bug.cgi?id=1211895Issue Tracking, Patch, Third Party Advisory
cve@mitre.orghttps://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.3Mailing List, Patch
cve@mitre.orghttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f04351888a83e595571de672e0a4a8b74f4fb31Mailing List, Patch
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2023/07/msg00030.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://syzkaller.appspot.com/bug?extid=8785e41224a3afd04321Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.suse.com/show_bug.cgi?id=1211895Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.3Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f04351888a83e595571de672e0a4a8b74f4fb31Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/07/msg00030.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://syzkaller.appspot.com/bug?extid=8785e41224a3afd04321Mailing List, Patch
Impacted products
Vendor Product Version
linux linux_kernel *
suse linux_enterprise 12.0
suse linux_enterprise 15.0
suse linux_enterprise 15.0
debian debian_linux 10.0
To clipboard 

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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.