CVE-2022-49775
published 2025-05-01CVE-2022-49775: In the Linux kernel, the following vulnerability has been resolved: tcp: cdg: allow tcp_cdg_release() to be called multiple times Apparently, mptcp is able to…
PriorityP339high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.19%
8.5th percentile
In the Linux kernel, the following vulnerability has been resolved:
tcp: cdg: allow tcp_cdg_release() to be called multiple times
Apparently, mptcp is able to call tcp_disconnect() on an already
disconnected flow. This is generally fine, unless current congestion
control is CDG, because it might trigger a double-free [1]
Instead of fixing MPTCP, and future bugs, we can make tcp_disconnect()
more resilient.
[1]
BUG: KASAN: double-free in slab_free mm/slub.c:3539 [inline]
BUG: KASAN: double-free in kfree+0xe2/0x580 mm/slub.c:4567
CPU: 0 PID: 3645 Comm: kworker/0:7 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: events mptcp_worker
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:317 [inline]
print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
kasan_report_invalid_free+0x81/0x190 mm/kasan/report.c:462
____kasan_slab_free+0x18b/0x1c0 mm/kasan/common.c:356
kasan_slab_free include/linux/kasan.h:200 [inline]
slab_free_hook mm/slub.c:1759 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1785
slab_free mm/slub.c:3539 [inline]
kfree+0xe2/0x580 mm/slub.c:4567
tcp_disconnect+0x980/0x1e20 net/ipv4/tcp.c:3145
__mptcp_close_ssk+0x5ca/0x7e0 net/mptcp/protocol.c:2327
mptcp_do_fastclose net/mptcp/protocol.c:2592 [inline]
mptcp_worker+0x78c/0xff0 net/mptcp/protocol.c:2627
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Allocated by task 3671:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:437 [inline]
____kasan_kmalloc mm/kasan/common.c:516 [inline]
____kasan_kmalloc mm/kasan/common.c:475 [inline]
__kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525
kma
Affected
21 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.0.10-1 (bookworm) | linux 6.0.10-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 2b0a8c9eee81882fc0001ccf6d9af62cdc682f9e < 0b19171439016a8e4c97eafe543670ac86e2b8fe | 0b19171439016a8e4c97eafe543670ac86e2b8fe |
| linux | linux | >= 2b0a8c9eee81882fc0001ccf6d9af62cdc682f9e < 4026033907cc6186d86b48daa4a252c860db2536 | 4026033907cc6186d86b48daa4a252c860db2536 |
| linux | linux | >= 2b0a8c9eee81882fc0001ccf6d9af62cdc682f9e < 9e481d87349d2282f400ee1d010a169c99f766b8 | 9e481d87349d2282f400ee1d010a169c99f766b8 |
| linux | linux | >= 2b0a8c9eee81882fc0001ccf6d9af62cdc682f9e < 78be2ee0112409ae4e9ee9e326151e0559b3d239 | 78be2ee0112409ae4e9ee9e326151e0559b3d239 |
| linux | linux | >= 2b0a8c9eee81882fc0001ccf6d9af62cdc682f9e < 35309be06b6feded2ab2cafbc2bca8534c2fa41e | 35309be06b6feded2ab2cafbc2bca8534c2fa41e |
| linux | linux | >= 2b0a8c9eee81882fc0001ccf6d9af62cdc682f9e < b49026d9c86f35a4c5bfb8d7345c9c4379828c6b | b49026d9c86f35a4c5bfb8d7345c9c4379828c6b |
| linux | linux | >= 2b0a8c9eee81882fc0001ccf6d9af62cdc682f9e < 1b639be27cbf428a5ca01dcf8b5d654194c956f8 | 1b639be27cbf428a5ca01dcf8b5d654194c956f8 |
| linux | linux | >= 2b0a8c9eee81882fc0001ccf6d9af62cdc682f9e < 72e560cb8c6f80fc2b4afc5d3634a32465e13a51 | 72e560cb8c6f80fc2b4afc5d3634a32465e13a51 |
| linux | linux_kernel | >= 0 < 5.10.158-1 | 5.10.158-1 |
| linux | linux_kernel | >= 0 < 6.0.10-1 | 6.0.10-1 |
| linux | linux_kernel | >= 0 < 6.0.10-1 | 6.0.10-1 |
| linux | linux_kernel | >= 0 < 6.0.10-1 | 6.0.10-1 |
| linux | linux_kernel | >= 4.10 < 4.14.300 | 4.14.300 |
| linux | linux_kernel | >= 4.15 < 4.19.267 | 4.19.267 |
| linux | linux_kernel | >= 4.2 < 4.9.334 | 4.9.334 |
| linux | linux_kernel | >= 4.20 < 5.4.225 | 5.4.225 |
| linux | linux_kernel | >= 5.11 < 5.15.80 | 5.15.80 |
| linux | linux_kernel | >= 5.16 < 6.0.10 | 6.0.10 |
| linux | linux_kernel | >= 5.5 < 5.10.156 | 5.10.156 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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Red Hat
kernel: tcp: cdg: allow tcp_cdg_release() to be called multiple times
vendor_redhat·2025-05-01·CVSS 7.8
CVE-2022-49775 [HIGH] kernel: tcp: cdg: allow tcp_cdg_release() to be called multiple times
kernel: tcp: cdg: allow tcp_cdg_release() to be called multiple times
In the Linux kernel, the following vulnerability has been resolved:
tcp: cdg: allow tcp_cdg_release() to be called multiple times
Apparently, mptcp is able to call tcp_disconnect() on an already
disconnected flow. This is generally fine, unless current congestion
control is CDG, because it might trigger a double-free [1]
Instead of fixing MPTCP, and future bugs, we can make tcp_disconnect()
more resilient.
[1]
BUG: KASAN: double-free in slab_free mm/slub.c:3539 [inline]
BUG: KASAN: double-free in kfree+0xe2/0x580 mm/slub.c:4567
CPU: 0 PID: 3645 Comm: kworker/0:7 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: events m
Debian
CVE-2022-49775: linux - In the Linux kernel, the following vulnerability has been resolved: tcp: cdg: a...
vendor_debian·2022·CVSS 7.8
CVE-2022-49775 [HIGH] CVE-2022-49775: linux - In the Linux kernel, the following vulnerability has been resolved: tcp: cdg: a...
In the Linux kernel, the following vulnerability has been resolved: tcp: cdg: allow tcp_cdg_release() to be called multiple times Apparently, mptcp is able to call tcp_disconnect() on an already disconnected flow. This is generally fine, unless current congestion control is CDG, because it might trigger a double-free [1] Instead of fixing MPTCP, and future bugs, we can make tcp_disconnect() more resilient. [1] BUG: KASAN: double-free in slab_free mm/slub.c:3539 [inline] BUG: KASAN: double-free in kfree+0xe2/0x580 mm/slub.c:4567 CPU: 0 PID: 3645 Comm: kworker/0:7 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: events mptcp_worker Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_
OSV
CVE-2022-49775: In the Linux kernel, the following vulnerability has been resolved: tcp: cdg: allow tcp_cdg_release() to be called multiple times Apparently, mptcp is
osv·2025-05-01·CVSS 7.8
CVE-2022-49775 [HIGH] CVE-2022-49775: In the Linux kernel, the following vulnerability has been resolved: tcp: cdg: allow tcp_cdg_release() to be called multiple times Apparently, mptcp is
In the Linux kernel, the following vulnerability has been resolved: tcp: cdg: allow tcp_cdg_release() to be called multiple times Apparently, mptcp is able to call tcp_disconnect() on an already disconnected flow. This is generally fine, unless current congestion control is CDG, because it might trigger a double-free [1] Instead of fixing MPTCP, and future bugs, we can make tcp_disconnect() more resilient. [1] BUG: KASAN: double-free in slab_free mm/slub.c:3539 [inline] BUG: KASAN: double-free in kfree+0xe2/0x580 mm/slub.c:4567 CPU: 0 PID: 3645 Comm: kworker/0:7 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: events mptcp_worker Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_
GHSA
GHSA-52wf-qx53-m2m5: In the Linux kernel, the following vulnerability has been resolved:
tcp: cdg: allow tcp_cdg_release() to be called multiple times
Apparently, mptcp
ghsa_unreviewed·2025-05-01
CVE-2022-49775 [HIGH] CWE-415 GHSA-52wf-qx53-m2m5: In the Linux kernel, the following vulnerability has been resolved:
tcp: cdg: allow tcp_cdg_release() to be called multiple times
Apparently, mptcp
In the Linux kernel, the following vulnerability has been resolved:
tcp: cdg: allow tcp_cdg_release() to be called multiple times
Apparently, mptcp is able to call tcp_disconnect() on an already
disconnected flow. This is generally fine, unless current congestion
control is CDG, because it might trigger a double-free [1]
Instead of fixing MPTCP, and future bugs, we can make tcp_disconnect()
more resilient.
[1]
BUG: KASAN: double-free in slab_free mm/slub.c:3539 [inline]
BUG: KASAN: double-free in kfree+0xe2/0x580 mm/slub.c:4567
CPU: 0 PID: 3645 Comm: kworker/0:7 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: events mptcp_worker
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/0b19171439016a8e4c97eafe543670ac86e2b8fehttps://git.kernel.org/stable/c/1b639be27cbf428a5ca01dcf8b5d654194c956f8https://git.kernel.org/stable/c/35309be06b6feded2ab2cafbc2bca8534c2fa41ehttps://git.kernel.org/stable/c/4026033907cc6186d86b48daa4a252c860db2536https://git.kernel.org/stable/c/72e560cb8c6f80fc2b4afc5d3634a32465e13a51https://git.kernel.org/stable/c/78be2ee0112409ae4e9ee9e326151e0559b3d239https://git.kernel.org/stable/c/9e481d87349d2282f400ee1d010a169c99f766b8https://git.kernel.org/stable/c/b49026d9c86f35a4c5bfb8d7345c9c4379828c6b
2025-05-01
Published