CVE-2024-53206
In the Linux kernel, the following vulnerability has been resolved: tcp: Fix use-after-free of nreq in reqsk_timer_handler().
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: tcp: Fix use-after-free of nreq in reqsk_timer_handler(). The cited commit replaced inet_csk_reqsk_queue_drop_and_put() with __inet_csk_reqsk_queue_drop() and reqsk_put() in reqsk_timer_handler(). Then, oreq should be passed to reqsk_put() instead of req; otherwise use-after-free of nreq could happen when reqsk is migrated but the retry attempt failed (e.g. due to timeout). Let's pass oreq to reqsk_put().
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.63% probability · 48th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/2dcc86fefe09ac853158afd96b60d544af115dc5Patch
- https://git.kernel.org/stable/c/65ed89cad1f57034c256b016e89e8c0a4ec7c65bPatch
- https://git.kernel.org/stable/c/6d845028609a4af0ad66f499ee0bd5789122b067Patch
- https://git.kernel.org/stable/c/9a3c1ad93e6fba67b3a637cfa95a57a6685e4908Patch
- https://git.kernel.org/stable/c/c31e72d021db2714df03df6c42855a1db592716cPatch
- https://git.kernel.org/stable/c/d0eb14cb8c08b00c36a3d5dc57a6f428b301f721Patch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.