From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6213D4A3F0D for ; Wed, 16 Sep 2026 10:40:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789555256; cv=none; b=QiJhNBxFcG3YmtJgw3A8+WVyVJMjXo4kukJ9+b2hsTUJHvleUWgpFYIgtjBgOPy6wg9iEH/L6mDlOoHGYEejjOt3los7mCwyTcNaE88bi+FNmpuPsuKHhIwJ9TLxrbEWn99/LNp8PdjlDdXJKq6oWM488BCoIW7hMq3JFBhNZ+c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789555256; c=relaxed/simple; bh=F1cNGGXWZsms/0faqvzGYkAMxZZMcHNHR1KH6zEZL08=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ROyi5tx5P7kWqDM36BKJU4pW4hQ8G0uX2OKk8VEoTawBQlg7C/vkZNV5+R1tC024UinNzG1SGpO3LjvB+vWbs1iLJIkKxSR1f18r4qfG4kfDj0DKKi4eHo+0+nqKsu3Q2wXotvFGhty/Y0EGW3yQxdWxI40GW4vjkazcl3atBA8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dzmooK6m; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="dzmooK6m" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1D2881F0089E; Wed, 16 Sep 2026 10:40:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789555247; bh=i5ciwthRnFPVNAE+twrqgldkNYjDYwFMNmRjlqQf9q4=; h=From:To:Cc:Subject:Date:Reply-To; b=dzmooK6mNASozykcOmtcMsNwU7v0ejVO9e5zwR0zUdSM4wthB9arV5VmYu69tB6w8 WrkrmS9he93GO2MJnzsTYNsV/XYuk5hAytRLCgQbELCaQ3x6WF8PjlQ6V5XBU3eywM IlVZBm2uqcGDgePYFw1tmqu7JjTPRg2YnTiG2GFw= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-89954: mtd: afs: validate v2 image info bounds Date: Wed, 16 Sep 2026 11:31:24 +0100 Message-ID: <2026091650-CVE-2026-89954-bbdf@gregkh> X-Mailer: git-send-email 2.55.0 Reply-To: , Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3659; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=wfk582RV4v0fU6qmnIexTv/cZxFDFjqCz9zlSr9y1xM=; b=owGbwMvMwCRo6H6F97bub03G02pJDFmr8ufdjTrifXNW4J7LkteP+Z1X2n5V+s4/rvcFHCF3k yakpZzv64hlYRBkYpAVU2T5so3n6P6KQ4pehranYeawMoEMYeDiFICJrPFnWLBZLnB19tcM64Vl RxzfbO5aZXnEdTLDgu2/I8K27LF9P/PivhclYr5nDk6oFQAA X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: mtd: afs: validate v2 image info bounds The AFS v2 parser uses footer[8] to locate the image information block inside the current erase block, then uses the image information region_count to walk entries from a fixed local array. The footer offset and region count come from flash contents and are not checked against the erase block or the local image-info array before use. Reject v2 entries whose image information offset would underflow the erase block calculation, and reject region counts that cannot fit in the local image-info array before walking region entries. The Linux kernel CVE team has assigned CVE-2026-89954 to this issue. Affected and fixed versions =========================== Issue introduced in 5.2 with commit b7cf5e2830bbb128699d7635ce8404b7f605bc95 and fixed in 5.10.270 with commit 1bec05a68414cf8d0cab6cb42445b8603f32ffc4 Issue introduced in 5.2 with commit b7cf5e2830bbb128699d7635ce8404b7f605bc95 and fixed in 5.15.221 with commit 3ad8ff12fd44b08af9212ac4883a7e29d2ab7348 Issue introduced in 5.2 with commit b7cf5e2830bbb128699d7635ce8404b7f605bc95 and fixed in 6.1.188 with commit 875daa3c750814ff2e2dc050239c390048f0bcd0 Issue introduced in 5.2 with commit b7cf5e2830bbb128699d7635ce8404b7f605bc95 and fixed in 6.6.157 with commit da740539e8f370767317e24615349b9342a6e773 Issue introduced in 5.2 with commit b7cf5e2830bbb128699d7635ce8404b7f605bc95 and fixed in 6.12.110 with commit 1edea8900ca3e405c1421d8b5c29f97107874f72 Issue introduced in 5.2 with commit b7cf5e2830bbb128699d7635ce8404b7f605bc95 and fixed in 6.18.51 with commit 18916f475057cbd2fb8ea6ae86e6b85884ad1d53 Issue introduced in 5.2 with commit b7cf5e2830bbb128699d7635ce8404b7f605bc95 and fixed in 7.2.5 with commit d14e6298139f58a87a87d7022e26a7f37f0ddce7 Issue introduced in 5.2 with commit b7cf5e2830bbb128699d7635ce8404b7f605bc95 and fixed in 7.3-rc1 with commit e9290031f736e99ad17c25c00311c92c266843b7 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-89954 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/mtd/parsers/afs.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/1bec05a68414cf8d0cab6cb42445b8603f32ffc4 https://git.kernel.org/stable/c/3ad8ff12fd44b08af9212ac4883a7e29d2ab7348 https://git.kernel.org/stable/c/875daa3c750814ff2e2dc050239c390048f0bcd0 https://git.kernel.org/stable/c/da740539e8f370767317e24615349b9342a6e773 https://git.kernel.org/stable/c/1edea8900ca3e405c1421d8b5c29f97107874f72 https://git.kernel.org/stable/c/18916f475057cbd2fb8ea6ae86e6b85884ad1d53 https://git.kernel.org/stable/c/d14e6298139f58a87a87d7022e26a7f37f0ddce7 https://git.kernel.org/stable/c/e9290031f736e99ad17c25c00311c92c266843b7