[scarthgap][PATCH] glibc: fix CVE-2026-5435

[scarthgap][PATCH] glibc: fix CVE-2026-5435

[Hemanth.KumarMD]

From: Hemanth Kumar M D <Hemanth.KumarMD@windriver.com>

resolv: More types as unknown in ns_sprintrrf (CVE-2026-5435)

Specifically, CERT, TKEY, TSIG, OPT.  This removes the buggy
implementations of TSIG, fixing bug 34033, and partially
fixing bug 34069.

Reference:
[1] https://nvd.nist.gov/vuln/detail/CVE-2026-5435
[2] https://sourceware.org/bugzilla/show_bug.cgi?id=34033
[3] https://sourceware.org/git/?p=glibc.git;a=commit;h=ca44a6609c29a683b03575fa035c6d17aa591e72

Signed-off-by: Hemanth Kumar M D <Hemanth.KumarMD@windriver.com>
---
 .../glibc/glibc/0024-CVE-2026-5435.patch      | 137 ++++++++++++++++++
 meta/recipes-core/glibc/glibc_2.39.bb         |   1 +
 2 files changed, 138 insertions(+)
 create mode 100644 meta/recipes-core/glibc/glibc/0024-CVE-2026-5435.patch

diff --git a/meta/recipes-core/glibc/glibc/0024-CVE-2026-5435.patch b/meta/recipes-core/glibc/glibc/0024-CVE-2026-5435.patch
new file mode 100644
index 0000000000..722ec2129c
--- /dev/null
+++ b/meta/recipes-core/glibc/glibc/0024-CVE-2026-5435.patch
@@ -0,0 +1,137 @@
+From 5d41b8e5aaec3580e4a05d93c5ff2fc69bb3d5a7 Mon Sep 17 00:00:00 2001
+From: Florian Weimer <fweimer@redhat.com>
+Date: Fri, 19 Jun 2026 18:22:20 +0200
+Subject: [PATCH] resolv: More types as unknown in ns_sprintrrf (CVE-2026-5435)
+
+Specifically, CERT, TKEY, TSIG, OPT.  This removes the buggy
+implementations of TSIG, fixing bug 34033, and partially
+fixing bug 34069.
+
+Reviewed-by: Carlos O'Donell <carlos@redhat.com>
+Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
+
+CVE: CVE-2026-5435
+Upstream-Status: Backport [https://sourceware.org/git/?p=glibc.git;a=patch;h=ca44a6609c29a683b03575fa035c6d17aa591e72]
+
+Signed-off-by: Hemanth Kumar M D <Hemanth.KumarMD@windriver.com>
+---
+ resolv/ns_print.c | 96 -----------------------------------------------
+ 1 file changed, 96 deletions(-)
+
+diff --git a/resolv/ns_print.c b/resolv/ns_print.c
+index cef2212fd2..882a86e58e 100644
+--- a/resolv/ns_print.c
++++ b/resolv/ns_print.c
+@@ -434,96 +434,6 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
+ 		break;
+ 	    }
+ 
+-	case ns_t_cert: {
+-		u_int c_type, key_tag, alg;
+-		int n;
+-		unsigned int siz;
+-		char base64_cert[8192], tmp[40];
+-		const char *leader;
+-
+-		c_type  = ns_get16(rdata); rdata += NS_INT16SZ;
+-		key_tag = ns_get16(rdata); rdata += NS_INT16SZ;
+-		alg = (u_int) *rdata++;
+-
+-		len = SPRINTF((tmp, "%d %d %d ", c_type, key_tag, alg));
+-		T(addstr(tmp, len, &buf, &buflen));
+-		siz = (edata-rdata)*4/3 + 4; /* "+4" accounts for trailing \0 */
+-		if (siz > sizeof(base64_cert) * 3/4) {
+-			const char *str = "record too long to print";
+-			T(addstr(str, strlen(str), &buf, &buflen));
+-		}
+-		else {
+-			len = b64_ntop(rdata, edata-rdata, base64_cert, siz);
+-
+-			if (len < 0)
+-				goto formerr;
+-			else if (len > 15) {
+-				T(addstr(" (", 2, &buf, &buflen));
+-				leader = "\n\t\t";
+-				spaced = 0;
+-			}
+-			else
+-				leader = " ";
+-
+-			for (n = 0; n < len; n += 48) {
+-				T(addstr(leader, strlen(leader),
+-					 &buf, &buflen));
+-				T(addstr(base64_cert + n, MIN(len - n, 48),
+-					 &buf, &buflen));
+-			}
+-			if (len > 15)
+-				T(addstr(" )", 2, &buf, &buflen));
+-		}
+-		break;
+-	    }
+-
+-	case ns_t_tkey: {
+-		/* KJD - need to complete this */
+-		u_long t;
+-		int mode, err, keysize;
+-
+-		/* Algorithm name. */
+-		T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
+-		T(addstr(" ", 1, &buf, &buflen));
+-
+-		/* Inception. */
+-		t = ns_get32(rdata);  rdata += NS_INT32SZ;
+-		len = SPRINTF((tmp, "%lu ", t));
+-		T(addstr(tmp, len, &buf, &buflen));
+-
+-		/* Expiration. */
+-		t = ns_get32(rdata);  rdata += NS_INT32SZ;
+-		len = SPRINTF((tmp, "%lu ", t));
+-		T(addstr(tmp, len, &buf, &buflen));
+-
+-		/* Mode , Error, Key Size. */
+-		/* Priority, Weight, Port. */
+-		mode = ns_get16(rdata);  rdata += NS_INT16SZ;
+-		err  = ns_get16(rdata);  rdata += NS_INT16SZ;
+-		keysize  = ns_get16(rdata);  rdata += NS_INT16SZ;
+-		len = SPRINTF((tmp, "%u %u %u ", mode, err, keysize));
+-		T(addstr(tmp, len, &buf, &buflen));
+-
+-		/* XXX need to dump key, print otherdata length & other data */
+-		break;
+-	    }
+-
+-	case ns_t_tsig: {
+-		/* BEW - need to complete this */
+-		int n;
+-
+-		T(len = addname(msg, msglen, &rdata, origin, &buf, &buflen));
+-		T(addstr(" ", 1, &buf, &buflen));
+-		rdata += 8; /*%< time */
+-		n = ns_get16(rdata); rdata += INT16SZ;
+-		rdata += n; /*%< sig */
+-		n = ns_get16(rdata); rdata += INT16SZ; /*%< original id */
+-		sprintf(buf, "%d", ns_get16(rdata));
+-		rdata += INT16SZ;
+-		addlen(strlen(buf), &buf, &buflen);
+-		break;
+-	    }
+-
+ 	case ns_t_a6: {
+ 		struct in6_addr a;
+ 		int pbyte, pbit;
+@@ -557,12 +467,6 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
+ 		break;
+ 	    }
+ 
+-	case ns_t_opt: {
+-		len = SPRINTF((tmp, "%u bytes", class));
+-		T(addstr(tmp, len, &buf, &buflen));
+-		break;
+-	    }
+-
+ 	default:
+ 		snprintf (errbuf, sizeof (errbuf), "unknown RR type %d", type);
+ 		comment = errbuf;
+-- 
+2.49.0
+
diff --git a/meta/recipes-core/glibc/glibc_2.39.bb b/meta/recipes-core/glibc/glibc_2.39.bb
index f6be1b5fc9..88ad5e44e8 100644
--- a/meta/recipes-core/glibc/glibc_2.39.bb
+++ b/meta/recipes-core/glibc/glibc_2.39.bb
@@ -56,6 +56,7 @@ SRC_URI =  "${GLIBC_GIT_URI};branch=${SRCBRANCH};name=glibc \
            file://0022-Avoid-hardcoded-build-time-paths-in-the-output-binar.patch \
            file://0023-qemu-stale-process.patch \
            file://0001-stdlib-Add-single-threaded-fast-path-to-rand.patch \
+           file://0024-CVE-2026-5435.patch \
 "
 S = "${WORKDIR}/git"
 B = "${WORKDIR}/build-${TARGET_SYS}"
-- 
2.49.0