CVE-2022-49085
drbd: Fix five use after free bugs in get_initial_state
Summary
Descriptions
In the Linux kernel, the following vulnerability has been resolved: drbd: Fix five use after free bugs in get_initial_state In get_initial_state, it calls notify_initial_state_done(skb,..) if
cb->args[5]==1. If genlmsg_put() failed in notify_initial_state_done(),
the skb will be freed by nlmsg_free(skb).
Then get_initial_state will goto out and the freed skb will be used by
return value skb->len, which is a uaf bug. What's worse, the same problem goes even further: skb can also be
freed in the notify_*_state_change -> notify_*_state calls below.
Thus 4 additional uaf bugs happened. My patch lets the problem callee functions: notify_initial_state_done
and notify_*_state_change return an error code if errors happen.
So that the error codes could be propagated and the uaf bugs can be avoid. v2 reports a compilation warning. This v3 fixed this warning and built
successfully in my local environment with no additional warnings.
v2: https://lore.kernel.org/patchwork/patch/1435218/
CVSS Scores
SSVC
- Decision:-
Timeline
- 2025-02-26 CVE Reserved
- 2025-02-26 CVE Published
- 2025-02-26 CVE Updated
- ---------- EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
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References (10)
| URL | Tag | Source |
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| https://git.kernel.org/stable/c/a29728463b254ce81ecefdf20c1a02e01d9361da | Vuln. Introduced |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.5 < 4.9.311 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.9.311" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.5 < 4.14.276 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.14.276" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.5 < 4.19.238 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.19.238" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.5 < 5.4.189 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.4.189" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.5 < 5.10.111 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.10.111" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.5 < 5.15.34 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.15.34" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.5 < 5.16.20 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.16.20" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.5 < 5.17.3 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.17.3" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.5 < 5.18 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.18" | en |
Affected
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