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Date: Wed, 28 Feb 2024 09:15:06 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: gregkh@...nel.org Subject: CVE-2021-47017: ath10k: Fix a use after free in ath10k_htc_send_bundle From: gregkh@...nel.org Description =========== In the Linux kernel, the following vulnerability has been resolved: ath10k: Fix a use after free in ath10k_htc_send_bundle In ath10k_htc_send_bundle, the bundle_skb could be freed by dev_kfree_skb_any(bundle_skb). But the bundle_skb is used later by bundle_skb->len. As skb_len = bundle_skb->len, my patch replaces bundle_skb->len to skb_len after the bundle_skb was freed. The Linux kernel CVE team has assigned CVE-2021-47017 to this issue. Affected and fixed versions =========================== Issue introduced in 5.8 with commit c8334512f3dd1 and fixed in 5.10.37 with commit 8bb054fb336f Issue introduced in 5.8 with commit c8334512f3dd1 and fixed in 5.11.21 with commit 3b1ac40c6012 Issue introduced in 5.8 with commit c8334512f3dd1 and fixed in 5.12.4 with commit 5e413c0831ff Issue introduced in 5.8 with commit c8334512f3dd1 and fixed in 5.13 with commit 8392df5d7e0b Please see https://www.kernel.org or 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-2021-47017 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/wireless/ath/ath10k/htc.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/8bb054fb336f4250002fff4e0b075221c05c3c65 https://git.kernel.org/stable/c/3b1ac40c6012140828caa79e592a438a18ebf71b https://git.kernel.org/stable/c/5e413c0831ff4700d1739db3fa3ae9f859744676 https://git.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3
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