Description
Off-by-one error in the pipe_advance function in lib/iov_iter.c in the Linux kernel before 4.9.5 allows local users to obtain sensitive information from uninitialized heap-memory locations in opportunistic circumstances by reading from a pipe after an incorrect buffer-release decision.
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 | linux | 4.9.6-1 | — |
| Debian 13 | linux | 4.9.6-1 | — |
| Debian 12 | linux | 4.9.6-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux-hwe | 4.10.0-27.30~16.04.2 | USN-3361-1 |
Advisories 1
- USN-3361-1 linux-hwe vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
References
- [oss-security] 20170120 Re: CVE REQUEST: linux kernel: process with pgid zero able to crash kernel mailing-list
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b9dc6f65bc5e232d1c05fe34b5daadc7e8bbf1fb
- https://bugzilla.redhat.com/show_bug.cgi?id=1416116
- 95716 vdb-entry
- https://github.com/torvalds/linux/commit/b9dc6f65bc5e232d1c05fe34b5daadc7e8bbf1fb
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.5