Description
Vim is an open source, command line text editor. Prior to version 9.2.0565, the update_snapshot() function in src/terminal.c copies the visible terminal screen into the scrollback buffer when a snapshot is taken. For each screen cell it walks the cell's chars[] array with no upper bound, stopping only when it encounters a NUL terminator. When a cell legitimately fills all VTERM_MAX_CHARS_PER_CELL (6) slots — a base character plus five combining marks — the bundled libvterm returns the array without a terminating NUL, so the loop reads past the fixed six-element array and appends the out-of-bounds values to a buffer reserved for only six characters. A program whose output is rendered inside a :terminal window can trigger this with a short byte sequence and no Vim scripting, leading to a crash. This issue has been patched in version 9.2.0565.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| vim | vim | < 9.2.0565 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | vim | 2:9.2.0782-1 | — |
| Debian 13 | vim | 2:9.1.1230-2+deb13u1 | — |
| Debian 12 | vim | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | vim | 2:9.1.2141-1ubuntu4.5 | — |
| Ubuntu 25.10 | vim | 2:9.1.0967-1ubuntu6.7 | — |
| Ubuntu 24.04 LTS | vim | 2:9.1.0016-1ubuntu7.16 | — |
| Ubuntu 22.04 LTS | vim | 2:8.2.3995-1ubuntu2.32 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | vim | 2:8.1.2269-1ubuntu5.32+esm8 | — |
| Ubuntu Pro 18.04 LTS | vim | 2:8.0.1453-1ubuntu1.13+esm20 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | vim +3 | 2:9.1.083-9.el10_2.20 | RHSA-2026:66336 |
| RHEL 9 | vim +3 | 2:8.2.2637-26.el9_8.21 | RHSA-2026:66366 |
| RHEL 8 | vim +3 | 2:8.0.1763-31.el8_10.7 | RHSA-2026:66348 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | vim +8 | 9.2.967-1.1.hum1 | RHSA-2026:57614 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | xxd +6 | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| AlmaLinux 9 | vim-X11 +4 | 2:8.2.2637-26.el9_8.21 | ALSA-2026:66366 |
| AlmaLinux 8 | vim-X11 +4 | 2:8.0.1763-31.el8_10.7 | ALSA-2026:66348 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | vim | 2:9.1.083-9.el10_2.20 | RLSA-2026:66336 |
| Rocky Linux 9 | vim | 2:8.2.2637-26.el9_8.21 | RLSA-2026:66366 |
| Rocky Linux 8 | vim | 2:8.0.1763-31.el8_10.7 | RLSA-2026:66348 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | vim | 9.2.0567-r0 | — |
| Alpine v3.23 | vim | 9.2.0567-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | xxd +6 | 2:9.2.597-1.amzn2023.0.1 | ALAS2023-2026-1862 |
| Amazon Linux 2 | xxd +6 | 2:9.0.2153-1.amzn2.0.11 | ALAS2-2026-3883 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | vim | 9.2.0620-1 | — |
Advisories 13
- WID-SEC-2026-1759 vim: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 1, 2026
- ALSA-2026:66366 Important: vim security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:66336 Important: vim security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:66348 Important: vim security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:57614 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:66366 Red Hat Security Advisory: vim security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2026:66336 Red Hat Security Advisory: vim security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2026:66348 Red Hat Security Advisory: vim security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RLSA-2026:66336 Important: vim security update Rocky Linux Security Advisories · Sep 11, 2026
- RLSA-2026:66366 Important: vim security update Rocky Linux Security Advisories · Sep 11, 2026
- RLSA-2026:66348 Important: vim security update Rocky Linux Security Advisories · Sep 11, 2026
- ALAS2-2026-3883 Important: vim security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 31, 2026
- ALAS2023-2026-1862 Important: vim security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 22, 2026