CVE-2021-47340

jfs: fix GPF in diFree

Description

In the Linux kernel, the following vulnerability has been resolved: jfs: fix GPF in diFree Avoid passing inode with JFS_SBI(inode->i_sb)->ipimap == NULL to diFree()[1]. GFP will appear: struct inode *ipimap = JFS_SBI(ip->i_sb)->ipimap; struct inomap *imap = JFS_IP(ipimap)->i_imap; JFS_IP() will return invalid pointer when ipimap == NULL Call Trace: diFree+0x13d/0x2dc0 fs/jfs/jfs_imap.c:853 [1] jfs_evict_inode+0x2c9/0x370 fs/jfs/inode.c:154 evict+0x2ed/0x750 fs/inode.c:578 iput_final fs/inode.c:1654 [inline] iput.part.0+0x3fe/0x820 fs/inode.c:1680 iput+0x58/0x70 fs/inode.c:1670

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.03%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/7bde24bde490f3139eee147efc6d60d6040fe975 patch
https://git.kernel.org/stable/c/745c9a59422c63f661f4374ed5181740db4130a1 patch
https://git.kernel.org/stable/c/49def1b0644892e3b113673c13d650c3060b43bc patch
https://git.kernel.org/stable/c/aff8d95b69051d0cf4acc3d91f22299fdbb9dfb3 patch
https://git.kernel.org/stable/c/a21e5cb1a64c904f1f0ef7b2d386fc7d2b1d2ce2 patch
https://git.kernel.org/stable/c/8018936950360f1c503bb385e158cfc5e4945d18 patch
https://git.kernel.org/stable/c/3bb27e27240289b47d3466f647a55c567adbdc3a patch
https://git.kernel.org/stable/c/42f102ea1943ecb10a0756bf75424de5d1d5beed patch
https://git.kernel.org/stable/c/9d574f985fe33efd6911f4d752de6f485a1ea732 patch

Frequently Asked Questions

What is the severity of CVE-2021-47340?
CVE-2021-47340 has been scored as a medium severity vulnerability.
How to fix CVE-2021-47340?
To fix CVE-2021-47340, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47340 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-47340 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47340?
CVE-2021-47340 affects Linux Linux, Linux Linux.
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