[wrynose][PATCH v2] libarchive: fix CVE-2026-15028

[wrynose][PATCH v2] libarchive: fix CVE-2026-15028

[Jakub Szczudlo (Nokia)]

Backport patch to fix CVE-2026-15028.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2026-15028

The link in NVD is wrong. Based on project own pull request:
  https://github.com/libarchive/libarchive/pull/3252

Fixing commit is the below one:
  https://github.com/libarchive/libarchive/commit/40b92de1def08e4fc319d55702785f82cedb7ef2

Signed-off-by: Jakub Szczudlo <jakub.szczudlo@nokia.com>
---
 .../libarchive/CVE-2026-15028.patch           | 41 +++++++++++++++++++
 .../libarchive/libarchive_3.8.7.bb            |  1 +
 2 files changed, 42 insertions(+)
 create mode 100644 meta/recipes-extended/libarchive/libarchive/CVE-2026-15028.patch

diff --git a/meta/recipes-extended/libarchive/libarchive/CVE-2026-15028.patch b/meta/recipes-extended/libarchive/libarchive/CVE-2026-15028.patch
new file mode 100644
index 0000000000..c63fcf22f2
--- /dev/null
+++ b/meta/recipes-extended/libarchive/libarchive/CVE-2026-15028.patch
@@ -0,0 +1,41 @@
+From 40b92de1def08e4fc319d55702785f82cedb7ef2 Mon Sep 17 00:00:00 2001
+From: datauwu <datauwu@users.noreply.github.com>
+Date: Mon, 6 Jul 2026 21:51:15 +0800
+Subject: [PATCH] tar: fix 1-byte OOB read in SUN.holesdata parsing
+
+header_pax_extension() passes PAX attribute values without the trailing
+newline to pax_attribute(). The SUN.holesdata parser read one byte past
+the supplied value when the last numeric field ended at the value
+boundary.
+
+Handle length == 0 before checking *e.
+
+CVE: CVE-2026-15028
+Upstream-Status: Backport [https://github.com/libarchive/libarchive/commit/40b92de1def08e4fc319d55702785f82cedb7ef2]
+Signed-off-by: Jakub Szczudlo <jakub.szczudlo@nokia.com>
+---
+ libarchive/archive_read_support_format_tar.c | 11 ++++-------
+ 1 file changed, 4 insertions(+), 7 deletions(-)
+
+diff --git a/libarchive/archive_read_support_format_tar.c b/libarchive/archive_read_support_format_tar.c
+index e07cfdb63b..1c0441db6c 100644
+--- a/libarchive/archive_read_support_format_tar.c
++++ b/libarchive/archive_read_support_format_tar.c
+@@ -3448,13 +3448,10 @@ pax_attribute_SUN_holesdata(struct archive_read *a, struct tar *tar,
+ 				return (ARCHIVE_FATAL);
+ 			tar->sparse_last->hole = hole;
+ 		}
+-		if (length == 0 || *e == '\n') {
+-			if (length == 0 && *e == '\n') {
+-				return (ARCHIVE_OK);
+-			} else {
+-				return (ARCHIVE_WARN);
+-			}
+-		}
++		if (length == 0)
++			return (ARCHIVE_OK);
++		if (*e == '\n')
++			return (ARCHIVE_WARN);
+ 		p = e + 1;
+ 		length--;
+ 		hole = hole == 0;
diff --git a/meta/recipes-extended/libarchive/libarchive_3.8.7.bb b/meta/recipes-extended/libarchive/libarchive_3.8.7.bb
index afc06f85d4..d4cd0b5b01 100644
--- a/meta/recipes-extended/libarchive/libarchive_3.8.7.bb
+++ b/meta/recipes-extended/libarchive/libarchive_3.8.7.bb
@@ -31,6 +31,7 @@ EXTRA_OECONF += "--enable-largefile --without-iconv"
 
 SRC_URI = "https://libarchive.org/downloads/libarchive-${PV}.tar.gz \
            file://run-ptest \
+           file://CVE-2026-15028.patch \
           "
 UPSTREAM_CHECK_URI = "https://www.libarchive.org/"
 
-- 
2.34.1

Re: [wrynose][PATCH v2] libarchive: fix CVE-2026-15028

[Yoann Congal]

On Mon Oct 12, 2026 at 1:00 PM CEST, Jakub Szczudlo (Nokia) wrote:
> Backport patch to fix CVE-2026-15028.
>
> References:
>   https://nvd.nist.gov/vuln/detail/CVE-2026-15028
>
> The link in NVD is wrong. Based on project own pull request:
>   https://github.com/libarchive/libarchive/pull/3252
>
> Fixing commit is the below one:
>   https://github.com/libarchive/libarchive/commit/40b92de1def08e4fc319d55702785f82cedb7ef2
>
> Signed-off-by: Jakub Szczudlo <jakub.szczudlo@nokia.com>
> ---
>  .../libarchive/CVE-2026-15028.patch           | 41 +++++++++++++++++++
>  .../libarchive/libarchive_3.8.7.bb            |  1 +
>  2 files changed, 42 insertions(+)
>  create mode 100644 meta/recipes-extended/libarchive/libarchive/CVE-2026-15028.patch

Hello,

This CVE still need a fix for blacksail and master before getting merged
here.

Regards,
-- 
Yoann Congal
Smile ECS

Re: [wrynose][PATCH v2] libarchive: fix CVE-2026-15028

[Jakub Szczudlo]

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Hi,
we talked about it in version 1 but I forgot to mention it in commit.
Anyway this CVE was fixed in 3.8.9 by cherry-pick:
https://github.com/libarchive/libarchive/commit/22ffe8e8e459970f3bc86b0267493fc4aa8249b8
that is both on master and blacksail.
I can mark them fixed there if you would like to.

Best regards,
Jakub Szczudlo

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Re: [OE-core] [wrynose][PATCH v2] libarchive: fix CVE-2026-15028

[Yoann Congal]

On Tue Oct 20, 2026 at 8:25 AM CEST, Jakub Szczudlo via lists.openembedded.org wrote:
> Hi,
> we talked about it in version 1 but I forgot to mention it in commit.
> Anyway this CVE was fixed in 3.8.9 by cherry-pick:
> https://github.com/libarchive/libarchive/commit/22ffe8e8e459970f3bc86b0267493fc4aa8249b8
> that is both on master and blacksail.
> I can mark them fixed there if you would like to.

Right! I lost context there. I'll add a note into the wrynose commit,
that will be enough on our side.

Could you contact NVD and report the erroneous data?

Thanks!
-- 
Yoann Congal
Smile ECS

Re: [wrynose][PATCH v2] libarchive: fix CVE-2026-15028

[Jakub Szczudlo]

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> 
> Could you contact NVD and report the erroneous data?
> 

Sure, I have sent e-mail to them.

Best regards,
Jakub Szczudlo

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