CVE-2019-19319 — In the Linux kernel before 5
In the Linux kernel before 5.2, a setxattr operation, after a mount of a crafted ext4 image, can cause a slab-out-of-bounds write access because of an ext4_xattr_set_entry use-after-free in fs/ext4/xattr.c when a large old_size value is used in a memset call, aka CID-345c0dbf3a30
Published
2019-11-27T22:48:19.000Z
Last modified
2024-08-05T02:16:46.994Z
01What is this vulnerability?
In the Linux kernel before 5.2, a setxattr operation, after a mount of a crafted ext4 image, can cause a slab-out-of-bounds write access because of an ext4_xattr_set_entry use-after-free in fs/ext4/xattr.c when a large old_size value is used in a memset call, aka CID-345c0dbf3a30.
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2019-11-27T22:48:19.000Z
- Last modified: 2024-08-05T02:16:46.994Z
09References
- github.com — https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19319
- security.netapp.com — https://security.netapp.com/advisory/ntap-20200103-0001/
- lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- www.debian.org — https://www.debian.org/security/2020/dsa-4698
- usn.ubuntu.com — https://usn.ubuntu.com/4391-1/
- bugzilla.suse.com — https://bugzilla.suse.com/show_bug.cgi?id=1158021
- git.kernel.org — https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=34…
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