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[2a01:cb00:1331:aa00:2b8:d20d:4b49:6413]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48310895107sm44975905e9.12.2026.02.04.05.25.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 04 Feb 2026 05:25:35 -0800 (PST) Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Wed, 04 Feb 2026 14:25:35 +0100 Message-Id: Subject: Re: [OE-core][scarthgap][PATCH v2] avahi: patch CVE-2026-24401 From: "Yoann Congal" To: , X-Mailer: aerc 0.20.0 References: <20260125094620.1239193-1-ankur.tyagi85@gmail.com> In-Reply-To: <20260125094620.1239193-1-ankur.tyagi85@gmail.com> List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Wed, 04 Feb 2026 13:25:47 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/230521 On Sun Jan 25, 2026 at 10:46 AM CET, Ankur Tyagi via lists.openembedded.org= wrote: > From: Ankur Tyagi > > Details https://nvd.nist.gov/vuln/detail/CVE-2026-24401 > > Signed-off-by: Ankur Tyagi > --- > changes in v2: > - fixed CVE reference in the patch > --- > meta/recipes-connectivity/avahi/avahi_0.8.bb | 1 + > .../avahi/files/CVE-2026-24401.patch | 74 +++++++++++++++++++ > 2 files changed, 75 insertions(+) > create mode 100644 meta/recipes-connectivity/avahi/files/CVE-2026-24401.= patch Hello, That patch looks needed on master (and maybe whinlatter). Can you send the patch there first please? Thanks! > > diff --git a/meta/recipes-connectivity/avahi/avahi_0.8.bb b/meta/recipes-= connectivity/avahi/avahi_0.8.bb > index bb20fd17cc..bf93e4c7b9 100644 > --- a/meta/recipes-connectivity/avahi/avahi_0.8.bb > +++ b/meta/recipes-connectivity/avahi/avahi_0.8.bb > @@ -38,6 +38,7 @@ SRC_URI =3D "${GITHUB_BASE_URI}/download/v${PV}/avahi-$= {PV}.tar.gz \ > file://CVE-2024-52616.patch \ > file://CVE-2024-52615.patch \ > file://CVE-2025-68276.patch \ > + file://CVE-2026-24401.patch \ > " > =20 > GITHUB_BASE_URI =3D "https://github.com/avahi/avahi/releases/" > diff --git a/meta/recipes-connectivity/avahi/files/CVE-2026-24401.patch b= /meta/recipes-connectivity/avahi/files/CVE-2026-24401.patch > new file mode 100644 > index 0000000000..1a442966fc > --- /dev/null > +++ b/meta/recipes-connectivity/avahi/files/CVE-2026-24401.patch > @@ -0,0 +1,74 @@ > +From 5eea2640324928c15936b7a2bcbf8ea0de7b08f7 Mon Sep 17 00:00:00 2001 > +From: Hugo Muis <198191869+friendlyhugo@users.noreply.github.com> > +Date: Sun, 2 Mar 2025 18:06:24 +0100 > +Subject: [PATCH] core: fix uncontrolled recursion bug using a simple loo= p > + detection algorithm > + > +Closes https://github.com/avahi/avahi/issues/501 > + > +CVE: CVE-2026-24401 > +Upstream-Status: Backport [https://github.com/avahi/avahi/commit/78eab31= 128479f06e30beb8c1cbf99dd921e2524] > +(cherry picked from commit 78eab31128479f06e30beb8c1cbf99dd921e2524) > +Signed-off-by: Ankur Tyagi > +--- > + avahi-core/browse.c | 40 ++++++++++++++++++++++++++++++++++++++++ > + 1 file changed, 40 insertions(+) > + > +diff --git a/avahi-core/browse.c b/avahi-core/browse.c > +index f461083..975b3e9 100644 > +--- a/avahi-core/browse.c > ++++ b/avahi-core/browse.c > +@@ -401,6 +401,40 @@ static int lookup_go(AvahiSRBLookup *l) { > + return n; > + } > +=20 > ++static int lookup_exists_in_path(AvahiSRBLookup* lookup, AvahiSRBLookup= * from, AvahiSRBLookup* to) { > ++ AvahiRList* rl; > ++ if (from =3D=3D to) > ++ return 0; > ++ for (rl =3D from->cname_lookups; rl; rl =3D rl->rlist_next) { > ++ int r =3D lookup_exists_in_path(lookup, rl->data, to); > ++ if (r =3D=3D 1) { > ++ /* loop detected, propagate result */ > ++ return r; > ++ } else if (r =3D=3D 0) { > ++ /* is loop detected? */ > ++ return lookup =3D=3D from; > ++ } else { > ++ /* `to` not found, continue */ > ++ continue; > ++ } > ++ } > ++ /* no path found */ > ++ return -1; > ++} > ++ > ++static int cname_would_create_loop(AvahiSRBLookup* l, AvahiSRBLookup* n= ) { > ++ int ret; > ++ if (l =3D=3D n) > ++ /* Loop to self */ > ++ return 1; > ++ > ++ ret =3D lookup_exists_in_path(n, l->record_browser->root_lookup, l)= ; > ++ > ++ /* Path to n always exists */ > ++ assert(ret !=3D -1); > ++ return ret; > ++} > ++ > + static void lookup_handle_cname(AvahiSRBLookup *l, AvahiIfIndex interfa= ce, AvahiProtocol protocol, AvahiLookupFlags flags, AvahiRecord *r) { > + AvahiKey *k; > + AvahiSRBLookup *n; > +@@ -420,6 +454,12 @@ static void lookup_handle_cname(AvahiSRBLookup *l, = AvahiIfIndex interface, Avahi > + return; > + } > +=20 > ++ if (cname_would_create_loop(l, n)) { > ++ /* CNAME loops are not allowed */ > ++ lookup_unref(n); > ++ return; > ++ } > ++ > + l->cname_lookups =3D avahi_rlist_prepend(l->cname_lookups, lookup_r= ef(n)); > +=20 > + lookup_go(n); --=20 Yoann Congal Smile ECS