fix: CVE-2026-29111 varlink null element check#38
Open
deepin-ci-robot wants to merge 1 commit intomasterfrom
Open
fix: CVE-2026-29111 varlink null element check#38deepin-ci-robot wants to merge 1 commit intomasterfrom
deepin-ci-robot wants to merge 1 commit intomasterfrom
Conversation
CVE-2026-29111: Local unprivileged user can trigger an assert in systemd When an unprivileged IPC API call is made with spurious data containing null elements in arrays/maps, systemd (as PID 1) hits an assert and freezes execution. This fix adds a null check in varlink_idl_validate_field_element_type() to gracefully reject such malformed data instead of triggering an assertion. Upstream: systemd/systemd@6f30740 Signed-off-by: deepin-ci-robot <packages@deepin.org>
Contributor
Author
|
[APPROVALNOTIFIER] This PR is NOT APPROVED This pull-request has been approved by: The full list of commands accepted by this bot can be found here. DetailsNeeds approval from an approver in each of these files:Approvers can indicate their approval by writing |
|
TAG Bot TAG: 255.2-4deepin25 |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
CVE-2026-29111 修复
漏洞描述
CVE-2026-29111: Local unprivileged user can trigger an assert in systemd
当非特权用户通过 varlink IPC API 发送包含 null 元素的数组/映射数据时，systemd (作为 PID 1) 会触发断言并冻结执行。
修复内容
在
varlink_idl_validate_field_element_type()函数中添加 null 检查，优雅地拒绝包含 null 元素的数据，而不是触发断言。上游修复
测试
影响范围
src/shared/varlink-idl.c(通过 debian 补丁)debian/patches/fix-CVE-2026-29111-varlink-null-check.patchGenerated by CVE-Fixer