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 B67D537187E for ; Sat, 15 Aug 2026 12:27:57 +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=1786796878; cv=none; b=UD7NHguQ17Omz6hcp2uDepvtjlYoYH3B7/2QeXEswZZuSdkNhOvvyq5A9C+K9F2wY5AhBiw8JMj2Zph8Tx8h6ZjCh+4xY1P7Q2KMdlL7Gu3mkvOrAnU122JiOeemcO5nZkgrQ3BQZgjJ+k30DzDTE9wNHhBSbqEBHjh8+Kcygi0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786796878; c=relaxed/simple; bh=bznaJ1mIep+biwcb9tSvjVUqEp0bsftzghm+Fp28kEU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=jBSz1I8A6kiTj7L893r/+0Fwwor9ziV4DtRnRKp4wCgJMFd/02E459VXJw/pohwMEyCQIZJItRoyWXt6LFSg993/ehbYGaKiTD0oBjNbrRcIpGFNwjf4veJor4BIgG/X5I4PCSBMZB5GmRg3y4bSpShC2NcDuNF2fFsgVThq6oo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Rnb+a0DI; 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="Rnb+a0DI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D61921F000E9; Sat, 15 Aug 2026 12:27:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786796877; bh=UNWDPp2KT+ucep+hLnuBrV5Nw7MTFh+eb+OChKm5R1Y=; h=From:To:Cc:Subject:Date:Reply-To; b=Rnb+a0DIrhdsJ+WK2/6aH2nx/qeVfI91qCMgxXYgRoI1uYgF8Qobr+yyNd6Gq28W1 a3ZbYHw0oHHfD8yJ+8PyIXJ31LdvE6hUKpj8GRMrdA5ji9dF91HpmmMuttOXxuL4uw fd1fS7SZSuYQSdwiYBJ0jCQGBNyKIjUgv0gG86cs= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-74454: drm/vc4: Supply the overflow slot size in BPOS, not the whole bin BO size Date: Sat, 15 Aug 2026 21:25:35 +0900 Message-ID: <2026081531-CVE-2026-74454-8096@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=3400; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=grU7FtyaX3OMJPp1y0FbjFypdp1INMaZJTI1tG5XrMQ=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkNUbu/Np5zPVva5u2S4vRLJr7S47/cE145/UViKw30g 04+s5LpiGVhEGRikBVTZPmyjefo/opDil6Gtqdh5rAygQxh4OIUgIlo5zMsuPrg08mGozqT69YW PtW52aazX770NsM8m0Mxr1N69pSd7/jlffER03VxdmEVAA== 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: drm/vc4: Supply the overflow slot size in BPOS, not the whole bin BO size vc4_overflow_mem_work() points BPOA at a 512KB slot inside the 16MB binner BO, but writes the size of the whole BO to BPOS. On every binner out-of-memory event the PTB is therefore authorized to write tile lists across all the other slots (which may hold the tile state, tile alloc and overflow memory of in-flight jobs) and, for any slot but the first, past the end of the binner BO into unrelated CMA memory. Since CMA pages are recycled into page cache and user allocations, this is arbitrary memory corruption by GPU DMA. In practice it shows up as GPU hangs with corrupted control list pointers, userspace heap corruption, a GPU that stays permanently wedged after the first hang, and occasional full system crashes, whenever a job overflows the initial binner slot. The bug dates back to the conversion from a dedicated overflow BO (where writing the full BO size was correct) to the slotted binner BO. The Linux kernel CVE team has assigned CVE-2026-74454 to this issue. Affected and fixed versions =========================== Issue introduced in 4.13 with commit 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 and fixed in 6.6.151 with commit 2f2291a119e9a8b696ae8bb36e86b75d272ceaea Issue introduced in 4.13 with commit 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 and fixed in 6.12.103 with commit 0badb30871004d34df87be33e853536f0b69885f Issue introduced in 4.13 with commit 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 and fixed in 6.18.44 with commit 6cd5acf6f87c073622bd61e38fe99c47365cda9c Issue introduced in 4.13 with commit 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 and fixed in 7.1.8 with commit 1e33ca7f44be64beed2735bb76b86eb65ba8c05b Issue introduced in 4.13 with commit 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 and fixed in 7.2-rc6 with commit 6395789e4739aa5177bbec0fa0f07ccc38d249b0 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-2026-74454 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/gpu/drm/vc4/vc4_irq.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/2f2291a119e9a8b696ae8bb36e86b75d272ceaea https://git.kernel.org/stable/c/0badb30871004d34df87be33e853536f0b69885f https://git.kernel.org/stable/c/6cd5acf6f87c073622bd61e38fe99c47365cda9c https://git.kernel.org/stable/c/1e33ca7f44be64beed2735bb76b86eb65ba8c05b https://git.kernel.org/stable/c/6395789e4739aa5177bbec0fa0f07ccc38d249b0