CVE-2024-49982: aoe: fix the potential use-after-free problem in more places
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: aoe: fix the potential use-after-free problem in more places For fixing CVE-2023-6270, f98364e92662 ("aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts") makes tx() calling dev_put() instead of doing in aoecmd_cfg_pkts(). It avoids that the tx() runs into use-after-free. Then Nicolai Stange found more places in aoe have potential use-after-free problem with tx(). e.g. revalidate(), aoecmd_ata_rw(), resend(), probe() and aoecmd_cfg_rsp(). Those functions also use aoenet_xmit() to push packet to tx queue. So they should also use dev_hold() to increase the refcnt of skb->dev. On the other hand, moving dev_put() to tx() causes that the refcnt of skb->dev be reduced to a negative value, because corresponding dev_hold() are not called in revalidate(), aoecmd_ata_rw(), resend(), probe(), and aoecmd_cfg_rsp(). This patch fixed this issue.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.10.214<5.10.227 | |
| Linux Kernel | >=5.15.153<5.15.168 | |
| Linux Kernel | >=6.1.83<6.1.113 | |
| Linux Kernel | >=6.6.23<6.6.55 | |
| Linux Kernel | >=6.7.11<6.8.2 | |
| Linux Kernel | >=6.9<6.10.14 | |
| Linux Kernel | >=6.11<6.11.3 | |
| Linux Kernel | =4.19.311 | |
| Linux Kernel | =5.4.273 | |
| Linux Kernel | =6.12-rc1 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 |
| debian/linux-6.1 | 6.1.119-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/07b418d50ccbbca7e5d87a3a0d41d436cefebf79
- https://git.kernel.org/stable/c/12f7b89dd72b25da4eeaa22097877963cad6418e
- https://git.kernel.org/stable/c/6d6e54fc71ad1ab0a87047fd9c211e75d86084a3
- https://git.kernel.org/stable/c/8253a60c89ec35c8f36fb2cc08cdf854c7a3eb58
- https://git.kernel.org/stable/c/89d9a69ae0c667e4d9d028028e2dcc837bae626f
- https://git.kernel.org/stable/c/a786265aecf39015418e4f930cc1c14603a01490
- https://git.kernel.org/stable/c/acc5103a0a8c200a52af7d732c36a8477436a3d3
- https://git.kernel.org/stable/c/bc2cbf7525ac288e07d465f5a1d8cb8fb9599254
- https://git.kernel.org/stable/c/f63461af2c1a86af4217910e47a5c46e3372e645
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-49982
- https://nvd.nist.gov/vuln/detail/CVE-2024-49982
- https://launchpad.net/bugs/cve/CVE-2024-49982
- https://security-tracker.debian.org/tracker/CVE-2024-49982
- https://ubuntu.com/security/CVE-2024-49982
- https://git.kernel.org/linus/6d6e54fc71ad1ab0a87047fd9c211e75d86084a3
Frequently Asked Questions
What is the severity of CVE-2024-49982?
The severity of CVE-2024-49982 is classified as high due to the potential for use-after-free vulnerabilities in the Linux kernel.
How do I fix CVE-2024-49982?
To fix CVE-2024-49982, upgrade to the latest patched versions of the Linux kernel provided by your distribution.
Which versions of the Linux kernel are affected by CVE-2024-49982?
CVE-2024-49982 affects Linux kernel versions between 4.19.311 and 6.12-rc1, along with specific versions in between.
What types of systems are impacted by CVE-2024-49982?
CVE-2024-49982 primarily impacts systems running specific versions of the Linux kernel across various Linux distributions.
Are there any workarounds for CVE-2024-49982?
There are no recommended workarounds for CVE-2024-49982, so applying the security patch is essential.
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