| From bippy-5f407fcff5a0 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-2024-49938: wifi: ath9k_htc: Use __skb_set_length() for resetting urb before resubmit |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| wifi: ath9k_htc: Use __skb_set_length() for resetting urb before resubmit |
| |
| Syzbot points out that skb_trim() has a sanity check on the existing length of |
| the skb, which can be uninitialised in some error paths. The intent here is |
| clearly just to reset the length to zero before resubmitting, so switch to |
| calling __skb_set_length(skb, 0) directly. In addition, __skb_set_length() |
| already contains a call to skb_reset_tail_pointer(), so remove the redundant |
| call. |
| |
| The syzbot report came from ath9k_hif_usb_reg_in_cb(), but there's a similar |
| usage of skb_trim() in ath9k_hif_usb_rx_cb(), change both while we're at it. |
| |
| The Linux kernel CVE team has assigned CVE-2024-49938 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.19.323 with commit e6b9bf32e0695e4f374674002de0527d2a6768eb |
| Fixed in 5.4.285 with commit d1f2fbc6a769081503f6ffedbb5cd1ac497f0e77 |
| Fixed in 5.10.227 with commit b02eb7c86ff2ef1411c3095ec8a52b13f68db04f |
| Fixed in 5.15.168 with commit 012ae530afa0785102360de452745d33c99a321b |
| Fixed in 6.1.113 with commit 6a875220670475d9247e576c15dc29823100a4e4 |
| Fixed in 6.6.55 with commit e37e348835032d6940ec89308cc8996ded691d2d |
| Fixed in 6.10.14 with commit 2c230210ec0ae6ed08306ac70dc21c24b817bb95 |
| Fixed in 6.11.3 with commit a9f4e28e8adaf0715bd4e01462af0a52ee46b01f |
| Fixed in 6.12 with commit 94745807f3ebd379f23865e6dab196f220664179 |
| |
| 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-2024-49938 |
| 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/ath9k/hif_usb.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/e6b9bf32e0695e4f374674002de0527d2a6768eb |
| https://git.kernel.org/stable/c/d1f2fbc6a769081503f6ffedbb5cd1ac497f0e77 |
| https://git.kernel.org/stable/c/b02eb7c86ff2ef1411c3095ec8a52b13f68db04f |
| https://git.kernel.org/stable/c/012ae530afa0785102360de452745d33c99a321b |
| https://git.kernel.org/stable/c/6a875220670475d9247e576c15dc29823100a4e4 |
| https://git.kernel.org/stable/c/e37e348835032d6940ec89308cc8996ded691d2d |
| https://git.kernel.org/stable/c/2c230210ec0ae6ed08306ac70dc21c24b817bb95 |
| https://git.kernel.org/stable/c/a9f4e28e8adaf0715bd4e01462af0a52ee46b01f |
| https://git.kernel.org/stable/c/94745807f3ebd379f23865e6dab196f220664179 |
