Use After Free in Vim
CVE-2023-46246
Vim is an improved version of the good old UNIX editor Vi. Heap-use-after-free in memory allocated in the function `ga_grow_inner` in in the file `src/alloc.c` at line 748, which is freed in the file `src/ex_docmd.c` in the function `do_cmdline` at line 1010 and then used again in `src/cmdhist.c` at line 759. When using the `:history` command, it's possible that the provided argument overflows the accepted value. Causing an Integer Overflow and potentially later an use-after-free. This vulnerability has been patched in version 9.0.2068.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.004 (27.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Vim — versions <= 9.0.2067
Weakness classification (CWE)
References
- github.com/vim/vim/security/advisories/GHSA-q22m-h7m2-9mgm (Exploit, Third Party Advisory)
- github.com/vim/vim/commit/9198c1f2b1ddecde22af918541e0de2a32f0f45a (Patch)
- security.netapp.com/advisory/ntap-20231208-0006/
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/…
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/…
Frequently asked questions
- What is CVE-2023-46246?
- CVE-2023-46246 is a medium-severity vulnerability in Vim, classified under Integer Overflow or Wraparound. CVSS score: 4.0/10. Published 2023-10-27.
- How severe is CVE-2023-46246?
- Medium severity. CVSS v3 base score is 4.0 out of 10.