CVE-2022-50655
- Source
- https://cve.org/CVERecord?id=CVE-2022-50655
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-50655.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-50655
- Downstream
- Published
- 2025-12-09T00:00:30.337Z
- Modified
- 2026-03-12T03:26:46.481199Z
- Summary
- ppp: associate skb with a device at tx
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ppp: associate skb with a device at tx
Syzkaller triggered flow dissector warning with the following:
r0 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0802, 0x0) ioctl$PPPIOCNEWUNIT(r0, 0xc004743e, &(0x7f00000000c0)) ioctl$PPPIOCSACTIVE(r0, 0x40107446, &(0x7f0000000240)={0x2, &(0x7f0000000180)=[{0x20, 0x0, 0x0, 0xfffff034}, {0x6}]}) pwritev(r0, &(0x7f0000000040)=[{&(0x7f0000000140)='\x00!', 0x2}], 0x1, 0x0, 0x0)
[ 9.485814] WARNING: CPU: 3 PID: 329 at net/core/flow_dissector.c:1016 __skbflowdissect+0x1ee0/0x1fa0 [ 9.485929] skbgetpoff+0x53/0xa0 [ 9.485937] bpfskbgetpayoffset+0xe/0x20 [ 9.485944] ? pppsendframe+0xc2/0x5b0 [ 9.485949] ? rawspinunlockirqrestore+0x40/0x60 [ 9.485958] ? __pppxmitprocess+0x7a/0xe0 [ 9.485968] ? ppp_xmitprocess+0x5b/0xb0 [ 9.485974] ? pppwrite+0x12a/0x190 [ 9.485981] ? doiterwrite+0x18e/0x2d0 [ 9.485987] ? __importiovec+0x30/0x130 [ 9.485997] ? dopwritev+0x1b6/0x240 [ 9.486016] ? tracehardirqson+0x47/0x50 [ 9.486023] ? __x64syspwritev+0x24/0x30 [ 9.486026] ? dosyscall64+0x3d/0x80 [ 9.486031] ? entrySYSCALL64afterhwframe+0x63/0xcd
Flow dissector tries to find skb net namespace either via device or via socket. Neigher is set in pppsendframe, so let's manually use ppp->dev.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50655.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/148dcbd3af039ae39c3af697a3183008c7995805
- https://git.kernel.org/stable/c/18dc946360bfe0de016a59e3cc3ee1f450fceb9d
- https://git.kernel.org/stable/c/4b8f3b939266c90f03b7cc7e26a4c28c7b64137b
- https://git.kernel.org/stable/c/7da524781c531ebaf2f94c9dc4c541b82edecfed
- https://git.kernel.org/stable/c/9f225444467b98579cf28d94f4ad053460dfdb84
- https://git.kernel.org/stable/c/ee678b1f52f9439e930db2db3fd7e345d03e1a50
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50655.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-50655
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
-
Introducedd58e468b1112dcd1d5193c0a89ff9f98b5a3e8b9Fixed7da524781c531ebaf2f94c9dc4c541b82edecfedFixed148dcbd3af039ae39c3af697a3183008c7995805Fixed4b8f3b939266c90f03b7cc7e26a4c28c7b64137bFixed18dc946360bfe0de016a59e3cc3ee1f450fceb9dFixedee678b1f52f9439e930db2db3fd7e345d03e1a50Fixed9f225444467b98579cf28d94f4ad053460dfdb84