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fix(mod_http2): upgrade to 2.0.42 and backport CVE fixes - #20165
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Kanishk Bansal (Kanishk-Bansal) wants to merge 1 commit into
Open
Kanishk Bansal (Kanishk-Bansal) wants to merge 1 commit into
Kanishk Bansal (Kanishk-Bansal) wants to merge 1 commit into
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Pin mod_http2 to Fedora f43, which moves 4.0 from 2.0.39 to 2.0.42 and carries Fedora's patch for CVE-2026-119618: https://src.fedoraproject.org/rpms/mod_http2/c/abbfe3047b64bc1bac3f77836440e0391a37f79e 2.0.42 already contains the httpd r1934882 changes that fix CVE-2026-49975 and CVE-2026-48913. The standalone mod_h2 project is archived, so backport two fixes that only landed in httpd 2.4.69 as patch overlays: - CVE-2026-43951: httpd commit 6ff9dc2fdbe7 (h2_c2_filter.c part) - CVE-2026-57941: httpd commit d072ed8f06d6 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Kanishk Bansal (Kanishk-Bansal)
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November 12, 2026 04:35
Kanishk Bansal (Kanishk-Bansal)
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🟡 Changes recommended
Temporary brigades allocated from the session pool remain retained after destruction, causing memory usage to grow across DATA frames and completed streams until the connection closes.
1 open issue
What changed in this PR
Updates Azure Linux’s standalone mod_http2 package from 2.0.39 to 2.0.42 and adds security backports. This complements the httpd upgrade because HTTP/2 support ships separately.
Changes:
- Moves
mod_http2into a dedicated component definition pinned to Fedora f43. - Includes Fedora’s CVE-2026-119618 patch and backports CVE-2026-43951 and CVE-2026-57941 fixes.
- Refreshes the component lock, rendered spec, patches, and source checksum.
| File | Description |
|---|---|
specs/m/mod_http2/sources |
Updates the tarball checksum for 2.0.42. |
specs/m/mod_http2/mod_http2.spec |
Updates version, patch declarations, and changelog. |
specs/m/mod_http2/mod_http2-2.0.42-CVE-2026-57941.patch |
Rendered session brigade-handling backport. |
specs/m/mod_http2/mod_http2-2.0.42-CVE-2026-43951.patch |
Rendered language-iteration backport. |
specs/m/mod_http2/mod_http2-2.0.42-CVE-2026-119618.patch |
Includes Fedora’s Content-Length correction. |
locks/mod_http2.lock |
Records the updated upstream pin and fingerprints. |
base/comps/mod_http2/overlays/0002-CVE-2026-57941.overlay.toml |
Registers the session-handling backport. |
base/comps/mod_http2/overlays/0001-CVE-2026-43951.overlay.toml |
Registers the language-iteration backport. |
base/comps/mod_http2/mod_http2.comp.toml |
Defines the dedicated component and upstream pin. |
base/comps/mod_http2/mod_http2-2.0.42-CVE-2026-57941.patch |
Supplies the session brigade-handling fix. |
base/comps/mod_http2/mod_http2-2.0.42-CVE-2026-43951.patch |
Supplies the language-iteration fix. |
base/comps/components.toml |
Removes the inline component entry. |
Review effort: Balanced
Comment on lines
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| + bb = apr_brigade_create(session->pool, | ||
| + session->c1->bucket_alloc); |
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Summary
Upgrade
mod_http2from 2.0.39 to 2.0.42 by pinning the Fedora f43 dist-git commitabbfe3047b64, and backport two fixes that only landed in httpd.Fedora titled that commit "Version update to 2.0.45", but the spec is 2.0.42 plus Fedora's patch for CVE-2026-119618.
The standalone icing/mod_h2 project was archived in June 2026 and the module is now maintained only inside httpd, so there will be no newer standalone release. httpd builds with
--disable-http2, so this package is what ships HTTP/2 support.CVEs addressed (5)
mod_http2-2.0.42-CVE-2026-119618.patch(same change as httpd 824beab9, 2.4.71)h2_c2_filter.cpart of httpd 6ff9dc2f (r1935006, 2.4.69)I checked each one against the source: the r1934882 hunks reverse-apply cleanly on 2.0.42 and are missing from 2.0.39, while the r1935006 and r1938665 changes are missing from both, so they are carried as patches.
Related: httpd 2.4.71 in #20164, mod_md in #20166.
Changes
base/comps/components.toml: drop the inlinemod_http2entrybase/comps/mod_http2/mod_http2.comp.toml: new, pins f43abbfe3047b64…base/comps/mod_http2/overlays/000{1,2}-*.overlay.toml+ patches: the two backportslocks/mod_http2.lock,specs/m/mod_http2/: refreshed and re-renderedTesting
--fuzz=0;rpmautospecgives2.0.42-2httpd -tOK, h2c GET and POST negotiate HTTP/2, 50 parallel h2c requests and no crashes inerror_logazldev comp update --check-only -p mod_http2is clean