Memory Leak The advisory has been revoked - it doesn't affect any version of package kernel (opens in a new tab)
Threat Intelligence
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Test your applications- Snyk IDSNYK-RHEL9-KERNEL-9937302
- published2 May 2025
- disclosed1 May 2025
Introduced: 1 May 2025
CVE-2022-49890 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:9.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by RHEL.
In the Linux kernel, the following vulnerability has been resolved:
capabilities: fix potential memleak on error path from vfs_getxattr_alloc()
In cap_inode_getsecurity(), we will use vfs_getxattr_alloc() to complete the memory allocation of tmpbuf, if we have completed the memory allocation of tmpbuf, but failed to call handler->get(...), there will be a memleak in below logic:
|-- ret = (int)vfs_getxattr_alloc(mnt_userns, ...) | /* ^^^ alloc for tmpbuf */ |-- value = krealloc(xattr_value, error + 1, flags) | / ^^^ alloc memory / |-- error = handler->get(handler, ...) | / error! */ |-- xattr_value = value | / xattr_value is &tmpbuf (memory leak!) */
So we will try to free(tmpbuf) after vfs_getxattr_alloc() fails to fix it.
[PM: subject line and backtrace tweaks]
References
- https://access.redhat.com/security/cve/CVE-2022-49890
- https://git.kernel.org/stable/c/0c3e6288da650d1ec911a259c77bc2d88e498603
- https://git.kernel.org/stable/c/2de8eec8afb75792440b8900a01d52b8f6742fd1
- https://git.kernel.org/stable/c/6bb00eb21c0fbf18e5d3538c9ff0cf63fd0ace85
- https://git.kernel.org/stable/c/7480aeff0093d8c54377553ec6b31110bea37b4d
- https://git.kernel.org/stable/c/8cf0a1bc12870d148ae830a4ba88cfdf0e879cee
- https://git.kernel.org/stable/c/90577bcc01c4188416a47269f8433f70502abe98
- https://git.kernel.org/stable/c/cdf01c807e974048c43c7fd3ca574f6086a57906