| From bippy-7c5fe7eed585 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-21927: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu() |
| |
| nvme_tcp_recv_pdu() doesn't check the validity of the header length. |
| When header digests are enabled, a target might send a packet with an |
| invalid header length (e.g. 255), causing nvme_tcp_verify_hdgst() |
| to access memory outside the allocated area and cause memory corruptions |
| by overwriting it with the calculated digest. |
| |
| Fix this by rejecting packets with an unexpected header length. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21927 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.0 with commit 3f2304f8c6d6ed97849057bd16fee99e434ca796 and fixed in 6.12.19 with commit 9fbc953d6b38bc824392e01850f0aeee3b348722 |
| Issue introduced in 5.0 with commit 3f2304f8c6d6ed97849057bd16fee99e434ca796 and fixed in 6.13.7 with commit 22b06c89aa6b2d1ecb8aea72edfb9d53af8d5126 |
| Issue introduced in 5.0 with commit 3f2304f8c6d6ed97849057bd16fee99e434ca796 and fixed in 6.14 with commit ad95bab0cd28ed77c2c0d0b6e76e03e031391064 |
| |
| 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-2025-21927 |
| 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/nvme/host/tcp.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/9fbc953d6b38bc824392e01850f0aeee3b348722 |
| https://git.kernel.org/stable/c/22b06c89aa6b2d1ecb8aea72edfb9d53af8d5126 |
| https://git.kernel.org/stable/c/ad95bab0cd28ed77c2c0d0b6e76e03e031391064 |
