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Fix for CVE-2026-4424

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Resolves: RHEL-157400
This commit is contained in:
Pavol Sloboda 2026-04-08 13:49:55 +02:00
parent 087be508ba
commit da9fb16f3f
2 changed files with 26 additions and 0 deletions
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23
libarchive-3.3.3-Fix-CVE-2026-4424.patch Normal file
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@ -0,0 +1,23 @@
# This patch originally consisted of 3 hunks on the upstream:
# https://github.com/libarchive/libarchive/pull/2898/changes/e1907c5832b6489c7b4198b0825f857c93a03c10
# https://github.com/libarchive/libarchive/pull/2898/changes/d379dc0b2976b7207d1ad78f5ed3eb99a5b6d375
# but only the first hunk needs to be backported since the
# logic fix the second hunk provides does not need to be added
# as the logic is still correct in the current version of libarchive (3.3.3)
# thus the vulnerability in the code does not yet exist
#
# the third hunk of the patch is not needed either as the part of
# the code which contains the vulnerability is not yet present in this version (3.3.3)
diff -Naur libarchive-3.3.3/libarchive/archive_read_support_format_rar.c libarchive-3.3.3_patched/libarchive/archive_read_support_format_rar.c
--- libarchive-3.3.3/libarchive/archive_read_support_format_rar.c 2018-09-02 08:05:18.000000000 +0200
+++ libarchive-3.3.3_patched/libarchive/archive_read_support_format_rar.c 2026-04-09 08:54:50.569789984 +0200
@@ -2288,7 +2288,8 @@
return (r);
}
- if (!rar->dictionary_size || !rar->lzss.window)
+ if (!rar->dictionary_size || !rar->lzss.window ||
+ (unsigned int)(rar->lzss.mask + 1) < rar->dictionary_size)
{
/* Seems as though dictionary sizes are not used. Even so, minimize
* memory usage as much as possible.

3
libarchive.spec
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@ -27,6 +27,9 @@ Patch12: %{name}-3.3.3-Fix-size-filed-in-pax-header.patch
Patch13: %{name}-3.3.3-Fix-CVE-2022-36227.patch
Patch14: %{name}-3.3.3-Fix-CVE-2025-5914.patch
Patch15: %{name}-3.3.3-skip-compression-level-1-check-on-s390x.patch
# Source: https://github.com/libarchive/libarchive/pull/2898/changes/d379dc0b2976b7207d1ad78f5ed3eb99a5b6d375
# and: https://github.com/libarchive/libarchive/pull/2898/changes/e1907c5832b6489c7b4198b0825f857c93a03c10
Patch16: %{name}-3.3.3-Fix-CVE-2026-4424.patch
BuildRequires: gcc