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Message-ID: <2024061949-CVE-2024-38586-70d6@gregkh> Date: Wed, 19 Jun 2024 15:37:58 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2024-38586: r8169: Fix possible ring buffer corruption on fragmented Tx packets. Description =========== In the Linux kernel, the following vulnerability has been resolved: r8169: Fix possible ring buffer corruption on fragmented Tx packets. An issue was found on the RTL8125b when transmitting small fragmented packets, whereby invalid entries were inserted into the transmit ring buffer, subsequently leading to calls to dma_unmap_single() with a null address. This was caused by rtl8169_start_xmit() not noticing changes to nr_frags which may occur when small packets are padded (to work around hardware quirks) in rtl8169_tso_csum_v2(). To fix this, postpone inspecting nr_frags until after any padding has been applied. The Linux kernel CVE team has assigned CVE-2024-38586 to this issue. Affected and fixed versions =========================== Issue introduced in 5.7 with commit 9020845fb5d6 and fixed in 5.15.161 with commit b6d21cf40de1 Issue introduced in 5.7 with commit 9020845fb5d6 and fixed in 6.1.93 with commit 0c48185a9530 Issue introduced in 5.7 with commit 9020845fb5d6 and fixed in 6.6.33 with commit 68222d7b4b72 Issue introduced in 5.7 with commit 9020845fb5d6 and fixed in 6.8.12 with commit 078d5b7500d7 Issue introduced in 5.7 with commit 9020845fb5d6 and fixed in 6.9.3 with commit 54e7a0d11124 Issue introduced in 5.7 with commit 9020845fb5d6 and fixed in 6.10-rc1 with commit c71e3a5cffd5 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-2024-38586 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/net/ethernet/realtek/r8169_main.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/b6d21cf40de103d63ae78551098a7c06af8c98dd https://git.kernel.org/stable/c/0c48185a95309556725f818b82120bb74e9c627d https://git.kernel.org/stable/c/68222d7b4b72aa321135cd453dac37f00ec41fd1 https://git.kernel.org/stable/c/078d5b7500d70af2de6b38e226b03f0b932026a6 https://git.kernel.org/stable/c/54e7a0d111240c92c0f02ceba6eb8f26bf6d6479 https://git.kernel.org/stable/c/c71e3a5cffd5309d7f84444df03d5b72600cc417
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