CVE-2022-48809
Linux Net SKB Destination Metadata Leak
Description
In the Linux kernel, the following vulnerability has been resolved: net: fix a memleak when uncloning an skb dst and its metadata When uncloning an skb dst and its associated metadata, a new dst+metadata is allocated and later replaces the old one in the skb. This is helpful to have a non-shared dst+metadata attached to a specific skb. The issue is the uncloned dst+metadata is initialized with a refcount of 1, which is increased to 2 before attaching it to the skb. When tun_dst_unclone returns, the dst+metadata is only referenced from a single place (the skb) while its refcount is 2. Its refcount will never drop to 0 (when the skb is consumed), leading to a memory leak. Fix this by removing the call to dst_hold in tun_dst_unclone, as the dst+metadata refcount is already 1.
INFO
Published Date :
July 16, 2024, 12:15 p.m.
Last Modified :
Nov. 21, 2024, 7:34 a.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
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information, practical solutions, and valuable tools related to
CVE-2022-48809
.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2022-48809
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-48809
vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/00e6d6c3bc14dfe32824e2c515f0e0f2d6ecf2f1 Added Reference https://git.kernel.org/stable/c/0be943916d781df2b652793bb2d3ae4f9624c10a Added Reference https://git.kernel.org/stable/c/4ac84498fbe84a00e7aef185e2bb3e40ce71eca4 Added Reference https://git.kernel.org/stable/c/8b1087b998e273f07be13dcb5f3ca4c309c7f108 Added Reference https://git.kernel.org/stable/c/9eeabdf17fa0ab75381045c867c370f4cc75a613 Added Reference https://git.kernel.org/stable/c/a80817adc2a4c1ba26a7aa5f3ed886e4a18dff88 Added Reference https://git.kernel.org/stable/c/c1ff27d100e2670b03cbfddb9117e5f9fc672540 Added Reference https://git.kernel.org/stable/c/fdcb263fa5cda15b8cb24a641fa2718c47605314 -
Initial Analysis by [email protected]
Aug. 07, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/00e6d6c3bc14dfe32824e2c515f0e0f2d6ecf2f1 No Types Assigned https://git.kernel.org/stable/c/00e6d6c3bc14dfe32824e2c515f0e0f2d6ecf2f1 Patch Changed Reference Type https://git.kernel.org/stable/c/0be943916d781df2b652793bb2d3ae4f9624c10a No Types Assigned https://git.kernel.org/stable/c/0be943916d781df2b652793bb2d3ae4f9624c10a Patch Changed Reference Type https://git.kernel.org/stable/c/4ac84498fbe84a00e7aef185e2bb3e40ce71eca4 No Types Assigned https://git.kernel.org/stable/c/4ac84498fbe84a00e7aef185e2bb3e40ce71eca4 Patch Changed Reference Type https://git.kernel.org/stable/c/8b1087b998e273f07be13dcb5f3ca4c309c7f108 No Types Assigned https://git.kernel.org/stable/c/8b1087b998e273f07be13dcb5f3ca4c309c7f108 Patch Changed Reference Type https://git.kernel.org/stable/c/9eeabdf17fa0ab75381045c867c370f4cc75a613 No Types Assigned https://git.kernel.org/stable/c/9eeabdf17fa0ab75381045c867c370f4cc75a613 Patch Changed Reference Type https://git.kernel.org/stable/c/a80817adc2a4c1ba26a7aa5f3ed886e4a18dff88 No Types Assigned https://git.kernel.org/stable/c/a80817adc2a4c1ba26a7aa5f3ed886e4a18dff88 Patch Changed Reference Type https://git.kernel.org/stable/c/c1ff27d100e2670b03cbfddb9117e5f9fc672540 No Types Assigned https://git.kernel.org/stable/c/c1ff27d100e2670b03cbfddb9117e5f9fc672540 Patch Changed Reference Type https://git.kernel.org/stable/c/fdcb263fa5cda15b8cb24a641fa2718c47605314 No Types Assigned https://git.kernel.org/stable/c/fdcb263fa5cda15b8cb24a641fa2718c47605314 Patch Added CWE NIST CWE-401 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.3 up to (excluding) 4.9.302 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.267 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.230 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.180 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.101 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.24 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 5.16.10 -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 16, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: net: fix a memleak when uncloning an skb dst and its metadata When uncloning an skb dst and its associated metadata, a new dst+metadata is allocated and later replaces the old one in the skb. This is helpful to have a non-shared dst+metadata attached to a specific skb. The issue is the uncloned dst+metadata is initialized with a refcount of 1, which is increased to 2 before attaching it to the skb. When tun_dst_unclone returns, the dst+metadata is only referenced from a single place (the skb) while its refcount is 2. Its refcount will never drop to 0 (when the skb is consumed), leading to a memory leak. Fix this by removing the call to dst_hold in tun_dst_unclone, as the dst+metadata refcount is already 1. Added Reference kernel.org https://git.kernel.org/stable/c/4ac84498fbe84a00e7aef185e2bb3e40ce71eca4 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/c1ff27d100e2670b03cbfddb9117e5f9fc672540 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/0be943916d781df2b652793bb2d3ae4f9624c10a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/a80817adc2a4c1ba26a7aa5f3ed886e4a18dff88 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/00e6d6c3bc14dfe32824e2c515f0e0f2d6ecf2f1 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/fdcb263fa5cda15b8cb24a641fa2718c47605314 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/8b1087b998e273f07be13dcb5f3ca4c309c7f108 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/9eeabdf17fa0ab75381045c867c370f4cc75a613 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-48809
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2022-48809
weaknesses.