From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 673393EDAB6 for ; Fri, 8 May 2026 14:22:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250177; cv=none; b=VAvzl4F4A54P8NTlw1I/JoDgysHEEb4+NX3OcQfHu0GmMeuHWIX6oUwVoEDRbm7Qmff4r7AdoAvEAmzVYxXdoac7oxLax3OJDLVnDUhKdkMJcLkUR1RgWAM5YjmHgTvvDQCoZKE/MwVKNMJefulQ10DZXNQRGcRhGR1e+nrczzg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250177; c=relaxed/simple; bh=n9m0INqhAAsnU4sYHBhM6fF9jl5b07hv4yQatIMecuc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=hDwOxoIUgNIL6RwIwR3MD0+/OQbHXnuPsHbv487tH5HKNi1tqN82XxVF/rJAmpvqQWDNBsneaL5cagGfDtaLs/OlSZcfvV4s9tDWJFZq+8fdAmZtw6zliDJ8pjP78thDkf3hymleMA3fdzJ4pDOg85sEP/YUJ2K28V2MxULMlKc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=bWxjGRcl; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="bWxjGRcl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C1569C2BCB0; Fri, 8 May 2026 14:22:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778250177; bh=n9m0INqhAAsnU4sYHBhM6fF9jl5b07hv4yQatIMecuc=; h=From:To:Cc:Subject:Date:Reply-To:From; b=bWxjGRclM+Bx5QrW+E8vHmMlBAjdTssgmL8zQDujPD2VlGuqMS1mJYA32US1Oi9Xr 2/N0VCWamGkmm/9/hZUTlF2hZdrGBucrFhmy19mFE+DuNsN8cIIF8ZmvikwIIXhr6J QkCX7v2lwR4wdk+w9fU8HjOzFmAgJkOKQU9G/D5k= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43373: net: ncsi: fix skb leak in error paths Date: Fri, 8 May 2026 16:21:42 +0200 Message-ID: <2026050830-CVE-2026-43373-2e8a@gregkh> X-Mailer: git-send-email 2.54.0 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=3470; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=OO32C8uMM/U9Vqnd1pGKPTEH3ciR3I5kSHGlQmWdIGs=; b=kA0DAAIRMUfUDdst+ykByyZiAGn98WrITb5UG8OtpWXD6yVVJSQ6gvdSNeLZ8+tQkkW6+FC0H 4hdBAARAgAdFiEE9LYMxb94wiFKMT3LMUfUDdst+ykFAmn98WoACgkQMUfUDdst+ykHvwCgscV2 IGM3whqSEMQBCZUZlN/URdwAn2GUI6AuMJi1G7+mecKFfLUZvPB3 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: net: ncsi: fix skb leak in error paths Early return paths in NCSI RX and AEN handlers fail to release the received skb, resulting in a memory leak. Specifically, ncsi_aen_handler() returns on invalid AEN packets without consuming the skb. Similarly, ncsi_rcv_rsp() exits early when failing to resolve the NCSI device, response handler, or request, leaving the skb unfreed. The Linux kernel CVE team has assigned CVE-2026-43373 to this issue. Affected and fixed versions =========================== Issue introduced in 4.8 with commit 138635cc27c9737f940c3aa80912ff7a61c825af and fixed in 5.10.253 with commit 9891d7f4f1ede473c54b49776ae07755083eef06 Issue introduced in 4.8 with commit 138635cc27c9737f940c3aa80912ff7a61c825af and fixed in 5.15.203 with commit fef5aa6e3bcf3c8053307642663a63b7362d7552 Issue introduced in 4.8 with commit 138635cc27c9737f940c3aa80912ff7a61c825af and fixed in 6.1.167 with commit 81d6aee32f8f7bbc175c05dbf61f4430bfb88c4a Issue introduced in 4.8 with commit 138635cc27c9737f940c3aa80912ff7a61c825af and fixed in 6.6.130 with commit 59962588197863d0d746879f193905c0c6b3df49 Issue introduced in 4.8 with commit 138635cc27c9737f940c3aa80912ff7a61c825af and fixed in 6.12.78 with commit 553366c271479c0d571dd1bb5d1bcde4747fb82e Issue introduced in 4.8 with commit 138635cc27c9737f940c3aa80912ff7a61c825af and fixed in 6.18.19 with commit b70c4e5e711931cdd56e6e905737b72f1e649189 Issue introduced in 4.8 with commit 138635cc27c9737f940c3aa80912ff7a61c825af and fixed in 6.19.9 with commit 87138dde2d6937b12b967f28fe598a7d59000ae4 Issue introduced in 4.8 with commit 138635cc27c9737f940c3aa80912ff7a61c825af and fixed in 7.0 with commit 5c3398a54266541610c8d0a7082e654e9ff3e259 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-2026-43373 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: net/ncsi/ncsi-aen.c net/ncsi/ncsi-rsp.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/9891d7f4f1ede473c54b49776ae07755083eef06 https://git.kernel.org/stable/c/fef5aa6e3bcf3c8053307642663a63b7362d7552 https://git.kernel.org/stable/c/81d6aee32f8f7bbc175c05dbf61f4430bfb88c4a https://git.kernel.org/stable/c/59962588197863d0d746879f193905c0c6b3df49 https://git.kernel.org/stable/c/553366c271479c0d571dd1bb5d1bcde4747fb82e https://git.kernel.org/stable/c/b70c4e5e711931cdd56e6e905737b72f1e649189 https://git.kernel.org/stable/c/87138dde2d6937b12b967f28fe598a7d59000ae4 https://git.kernel.org/stable/c/5c3398a54266541610c8d0a7082e654e9ff3e259