CVE-2021-47295
What it is
In the Linux kernel, the following vulnerability has been resolved: net: sched: fix memory leak in tcindex_partial_destroy_work Syzbot reported memory leak in tcindex_set_parms(). The problem was in non-freed perfect hash in tcindex_partial_destroy_work(). In tcindex_set_parms() new tcindex_data is allocated and some fields from old one are copied to new one, but not the perfect hash. Since tcindex_partial_destroy_work() is the destroy function for old tcindex_data, we need to free perfect hash to avoid memory leak.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of service disruption.
- Exploit odds
- 1.5% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 1.5% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 1.5% · EPSS, next 30 days
- Weakness
- CWE-400 · Uncontrolled resource consumption
- Record status
- Modified
Affected
- Linux Kernel < 5.4.136
- Linux Kernel < 5.10.54
- Linux Kernel < 5.13.6
- Linux Kernel 5.14
Attack profile CVSS 3.1 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-47295.md and follow it. Check whether this project is affected by CVE-2021-47295. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/8d7924ce85bae64e7a67c366c7c50840f49f3a62
- https://git.kernel.org/stable/c/8e9662fde6d63c78eb1350f6167f64c9d71a865b
- https://git.kernel.org/stable/c/cac71d27745f92ee13f0ecc668ffe151a4a9c9b1
- https://git.kernel.org/stable/c/f5051bcece50140abd1a11a2d36dc3ec5484fc32
- https://git.kernel.org/stable/c/8d7924ce85bae64e7a67c366c7c50840f49f3a62
- https://git.kernel.org/stable/c/8e9662fde6d63c78eb1350f6167f64c9d71a865b
- https://git.kernel.org/stable/c/cac71d27745f92ee13f0ecc668ffe151a4a9c9b1
- https://git.kernel.org/stable/c/f5051bcece50140abd1a11a2d36dc3ec5484fc32
References
- https://git.kernel.org/stable/c/01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77b
- https://git.kernel.org/stable/c/18c3fa7a7fdbb4d21dafc8a7710ae2c1680930f6
- https://git.kernel.org/stable/c/372ae77cf11d11fb118cbe2d37def9dd5f826abd
- https://git.kernel.org/stable/c/3abebc503a5148072052c229c6b04b329a420ecd
- https://git.kernel.org/stable/c/53af9c793f644d5841d84d8e0ad83bd7ab47f3e0
- https://git.kernel.org/stable/c/7a6fb69bbcb21e9ce13bdf18c008c268874f0480
- https://git.kernel.org/stable/c/7c183dc0af472dec33d2c0786a5e356baa8cad19
- https://git.kernel.org/stable/c/8d7924ce85bae64e7a67c366c7c50840f49f3a62
- https://git.kernel.org/stable/c/8e9662fde6d63c78eb1350f6167f64c9d71a865b
- https://git.kernel.org/stable/c/cac71d27745f92ee13f0ecc668ffe151a4a9c9b1
- https://git.kernel.org/stable/c/f5051bcece50140abd1a11a2d36dc3ec5484fc32
- https://git.kernel.org/stable/c/8d7924ce85bae64e7a67c366c7c50840f49f3a62
- https://git.kernel.org/stable/c/8e9662fde6d63c78eb1350f6167f64c9d71a865b
- https://git.kernel.org/stable/c/cac71d27745f92ee13f0ecc668ffe151a4a9c9b1
- https://git.kernel.org/stable/c/f5051bcece50140abd1a11a2d36dc3ec5484fc32