[From nobody Mon Jun 1 17:21:06 2026 Received: (at submit) by bugs.debian.org; 1 Jun 2026 15:33:35 +0000 X-Spam-Checker-Version: SpamAssassin 4.0.1-bugs.debian.org_2005_01_02 (2024-03-25) on buxtehude.debian.org X-Spam-Level: X-Spam-Status: No, score=-10.9 required=4.0 tests=BAYES_00,FOURLA, FROMDEVELOPER,MD5_SHA1_SUM,NO_RELAYS,XMAILER_REPORTBUG autolearn=ham autolearn_force=no version=4.0.1-bugs.debian.org_2005_01_02 X-Spam-Bayes: score:0.0000 Tokens: new, 26; hammy, 149; neutral, 64; spammy, 1. spammytokens:0.941-+--H*r:bugs.debian.org hammytokens:0.000-+--H*F:U*carnil, 0.000-+--XDebbugsCc, 0.000-+--X-Debbugs-Cc, 0.000-+--H*Ad:N*Bug, 0.000-+--H*Ad:N*Tracking Return-path: <carnil@debian.org> Received: via submission by buxtehude.debian.org with esmtp (Exim 4.96) (envelope-from <carnil@debian.org>) id 1wU4dw-007Yf5-1W for submit@bugs.debian.org; Mon, 01 Jun 2026 15:33:35 +0000 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Salvatore Bonaccorso <carnil@debian.org> To: Debian Bug Tracking System <submit@bugs.debian.org> Subject: libsereal-decoder-perl: CVE-2026-8796 Message-ID: <178032801138.1171550.834112239393849059.reportbug@eldamar.lan> X-Mailer: reportbug 13.2.0 Date: Mon, 01 Jun 2026 17:33:31 +0200 Delivered-To: submit@bugs.debian.org Source: libsereal-decoder-perl Version: 5.004+ds-1 Severity: important Tags: security upstream X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org> Hi, The following vulnerability was published for libsereal-decoder-perl. CVE-2026-8796[0]: | Sereal::Decoder versions before 5.005 for Perl allow heap out-of- | bounds read via crafted input. In Perl/Decoder/srl_decoder.c, | srl_read_object() and srl_read_hash() process a COPY tag, a back- | reference whose target byte the decoder re-decodes as a fresh tag. | When that target byte matches the SHORT_BINARY pattern (an inline | string whose length is encoded in the low bits of the tag), the | resulting read is not bounded to precede the COPY tag's own offset | and can run past the end of the input buffer. An attacker controlled | COPY offset can land inside a previously decoded value rather than | on a tag boundary, planting a byte that the decoder reads as a | SHORT_BINARY tag and consuming up to 31 following bytes from the | heap as a class name (OBJECT path) or hash key (HASH path). If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-8796 https://www.cve.org/CVERecord?id=CVE-2026-8796 [1] https://lists.security.metacpan.org/cve-announce/msg/40571630/ [2] https://github.com/Sereal/Sereal/commit/303a2c69cdba80bf37a3ff43461e0aa78198a7a3 Please adjust the affected versions in the BTS as needed. Regards, Salvatore ]