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CVE-2022-49732

sock: redo the psock vs ULP protection check

Medium5.5EPSS 0.20%
Published
Updated
Reserved
Assigned by
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: sock: redo the psock vs ULP protection check Commit 8a59f9d1e3d4 ("sock: Introduce sk->sk_prot->psock_update_sk_prot()") has moved the inet_csk_has_ulp(sk) check from sk_psock_init() to the new tcp_bpf_update_proto() function. I'm guessing that this was done to allow creating psocks for non-inet sockets. Unfortunately the destruction path for psock includes the ULP unwind, so we need to fail the sk_psock_init() itself. Otherwise if ULP is already present we'll notice that later, and call tcp_update_ulp() with the sk_proto of the ULP itself, which will most likely result in the ULP looping its callbacks.

Timeline

  1. ID reserved

    By Linux

  2. Published

  3. · 15 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2022-49732, by who scored it
Scored byCVSSScoreVector
NVDNVD · Analyzed3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.20% · top 90% of all CVEs (7 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Affected products

  • Linux · Linux

    • affected 8a59f9d1e3d4340659fdfee8879dc09a6f2546e1 – < 72fa0f65b56605b8a9ae9fba2082f2123f7fe017
    • affected 8a59f9d1e3d4340659fdfee8879dc09a6f2546e1 – < 922309e50befb0cfa5cb65e4989b7706d6578846
    • affected 8a59f9d1e3d4340659fdfee8879dc09a6f2546e1 – < e34a07c0ae3906f97eb18df50902e2a01c1015b6

  • Linux · Linux

    • affected 5.13
    • unaffected < 5.13
    • unaffected 5.15.51 – ≤ 5.15.*
    • unaffected 5.18.8 – ≤ 5.18.*
    • unaffected 5.19 – ≤ *

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .