CVE-2022-49017

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Source
https://cve.org/CVERecord?id=CVE-2022-49017
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49017.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49017
Downstream
Related
Published
2024-10-21T20:06:25.971Z
Modified
2026-03-20T12:22:06.084874Z
Summary
tipc: re-fetch skb cb after tipc_msg_validate
Details

In the Linux kernel, the following vulnerability has been resolved:

tipc: re-fetch skb cb after tipcmsgvalidate

As the call trace shows, the original skb was freed in tipcmsgvalidate(), and dereferencing the old skb cb would cause an use-after-free crash.

BUG: KASAN: use-after-free in tipccryptorcvcomplete+0x1835/0x2240 [tipc] Call Trace: <IRQ> tipccryptorcvcomplete+0x1835/0x2240 [tipc] tipccryptorcv+0xd32/0x1ec0 [tipc] tipcrcv+0x744/0x1150 [tipc] ... Allocated by task 47078: kmemcacheallocnode+0x158/0x4d0 _allocskb+0x1c1/0x270 tipcbufacquire+0x1e/0xe0 [tipc] tipcmsgcreate+0x33/0x1c0 [tipc] tipclinkbuildprotomsg+0x38a/0x2100 [tipc] tipclinktimeout+0x8b8/0xef0 [tipc] tipcnodetimeout+0x2a1/0x960 [tipc] calltimerfn+0x2d/0x1c0 ... Freed by task 47078: tipcmsgvalidate+0x7b/0x440 [tipc] tipccryptorcvcomplete+0x4b5/0x2240 [tipc] tipccryptorcv+0xd32/0x1ec0 [tipc] tipcrcv+0x744/0x1150 [tipc]

This patch fixes it by re-fetching the skb cb from the new allocated skb after calling tipcmsgvalidate().

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49017.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
fc1b6d6de2208774efd2a20bf0daddb02d18b1e0
Fixed
a1ba595e35aa3afbe417ff0af353afb9f65559c0
Fixed
1daec0815655e110c6f206c5e777a4af8168ff58
Fixed
e128190adb2edfd5042105b5d1ed4553f295f5ef
Fixed
3067bc61fcfe3081bf4807ce65560f499e895e77

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49017.json"