Access of Uninitialized Pointer Affecting kernel-debug-devel package, versions *
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGDEVEL-8287310
- published 23 Oct 2024
- disclosed 21 Oct 2024
Introduced: 21 Oct 2024
CVE-2024-49938 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:8 kernel-debug-devel.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-devel package and not the kernel-debug-devel package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2024-49938
- https://git.kernel.org/stable/c/012ae530afa0785102360de452745d33c99a321b
- https://git.kernel.org/stable/c/2c230210ec0ae6ed08306ac70dc21c24b817bb95
- https://git.kernel.org/stable/c/6a875220670475d9247e576c15dc29823100a4e4
- https://git.kernel.org/stable/c/94745807f3ebd379f23865e6dab196f220664179
- https://git.kernel.org/stable/c/a9f4e28e8adaf0715bd4e01462af0a52ee46b01f
- https://git.kernel.org/stable/c/b02eb7c86ff2ef1411c3095ec8a52b13f68db04f
- https://git.kernel.org/stable/c/d1f2fbc6a769081503f6ffedbb5cd1ac497f0e77
- https://git.kernel.org/stable/c/e37e348835032d6940ec89308cc8996ded691d2d
- https://git.kernel.org/stable/c/e6b9bf32e0695e4f374674002de0527d2a6768eb