CVE-2023-52735

bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself

9.1 CriticalFix available

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

bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself

sock_map proto callbacks should never call themselves by design. Protect against bugs like [1] and break out of the recursive loop to avoid a stack overflow in favor of a resource leak.

[1] https://lore.kernel.org/all/[email protected]/

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: High

Exploit likelihood

1.22%Up 1.2 points since May 22, 2024

What each source reports

CVE List Score used 9.1

bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself

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

bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself

sock_map proto callbacks should never call themselves by design. Protect against bugs like [1] and break out of the recursive loop to avoid a stack overflow in favor of a resource leak.

[1] https://lore.kernel.org/all/[email protected]/

Record: CVE-2023-52735
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness: CWE-120
Updated: 2026-11-02

EUVDEUVD-2023-59454 9.1

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

bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself

sock_map proto callbacks should never call themselves by design. Protect against bugs like [1] and break out of the recursive loop to avoid a stack overflow in favor of a resource leak.

[1] https://lore.kernel.org/all/[email protected]/

Record: EUVD-2023-59454
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-47rw-4rpj-m5g9 9.1

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Don't let...

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

bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself

sock_map proto callbacks should never call themselves by design. Protect against bugs like [1] and break out of the recursive loop to avoid a stack overflow in favor of a resource leak.

[1] https://lore.kernel.org/all/[email protected]/

Record: GHSA-47rw-4rpj-m5g9
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness: CWE-120
Updated: 2026-11-02

NVD 9.1

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

bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself

sock_map proto callbacks should never call themselves by design. Protect against bugs like [1] and break out of the recursive loop to avoid a stack overflow in favor of a resource leak.

[1] https://lore.kernel.org/all/[email protected]/

Record: CVE-2023-52735
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness: CWE-120
Updated: 2026-11-02

OSVBELL-CVE-2023-52735 9.1

Record: BELL-CVE-2023-52735
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated: 2026-11-02

OSV 9.1

bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself

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

bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself

sock_map proto callbacks should never call themselves by design. Protect against bugs like [1] and break out of the recursive loop to avoid a stack overflow in favor of a resource leak.

[1] https://lore.kernel.org/all/[email protected]/

Record: CVE-2023-52735
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated: 2026-11-02

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OSVDEBIAN-CVE-2023-52735 9.1

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself sock_map proto callbacks should never call themselves by design. Protect against bugs like [1] and break out of the recursive loop to avoid a stack overflow in favor of a resource leak. [1] https://lore.kernel.org/all/[email protected]/

Record: DEBIAN-CVE-2023-52735
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated: 2026-11-02

OSVOESA-2024-1693 7.8

kernel security update

The Linux Kernel, the operating system core itself.

Security Fix(es):

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

mptcp: ensure tx skbs always have the MPTCP ext

Due to signed/unsigned comparison, the expression:

info-&gt;size_goal - skb-&gt;len &gt; 0

evaluates to true when the size goal is smaller than the skb size. That results in lack of tx cache refill, so that the skb allocated by the core TCP code lacks the required MPTCP skb extensions.

Due to the above, syzbot is able to trigger the following WARN_ON():

WARNING: CPU: 1 PID: 810 at net/mptcp/protocol.c:1366 mptcp_sendmsg_frag+0x1362/0x1bc0 net/mptcp/protocol.c:1366 Modules linked in: CPU: 1 PID: 810 Comm: syz-executor.4 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mptcp_sendmsg_frag+0x1362/0x1bc0 net/mptcp/protocol.c:1366 Code: ff 4c 8b 74 24 50 48 8b 5c 24 58 e9 0f fb ff ff e8 13 44 8b f8 4c 89 e7 45 31 ed e8 98 57 2e fe e9 81 f4 ff ff e8 fe 43 8b f8 <0f> 0b 41 bd ea ff ff ff e9 6f f4 ff ff 4c 89 e7 e8 b9 8e d2 f8 e9 RSP: 0018:ffffc9000531f6a0 EFLAGS: 00010216 RAX: 000000000000697f RBX: 0000000000000000 RCX: ffffc90012107000 RDX: 0000000000040000 RSI: ffffffff88eac9e2 RDI: 0000000000000003 RBP: ffff888078b15780 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff88eac017 R11: 0000000000000000 R12: ffff88801de0a280 R13: 0000000000006b58 R14: ffff888066278280 R15: ffff88803c2fe9c0 FS: 00007fd9f866e700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faebcb2f718 CR3: 00000000267cb000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __mptcp_push_pending+0x1fb/0x6b0 net/mptcp/protocol.c:1547 mptcp_release_cb+0xfe/0x210 net/mptcp/protocol.c:3003 release_sock+0xb4/0x1b0 net/core/sock.c:3206 sk_stream_wait_memory+0x604/0xed0 net/core/stream.c:145 mptcp_sendmsg+0xc39/0x1bc0 net/mptcp/protocol.c:1749 inet6_sendmsg+0x99/0xe0 net/ipv6/af_inet6.c:643 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 sock_write_iter+0x2a0/0x3e0 net/socket.c:1057 call_write_iter include/linux/fs.h:2163 [inline] new_sync_write+0x40b/0x640 fs/read_write.c:507 vfs_write+0x7cf/0xae0 fs/read_write.c:594 ksys_write+0x1ee/0x250 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd9f866e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665f9 RDX: 00000000000e7b78 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 0000000000a9fb1f R14: 00007fd9f866e300 R15: 0000000000022000

Fix the issue rewriting the relevant expression to avoid sign-related problems - note: size_goal is always >= 0.

Additionally, ensure that the skb in the tx cache always carries the relevant extension.(CVE-2021-47370)

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

drm/amdgpu: Fix even more out of bound writes from debugfs

CVE-2021-42327 was fixed by:

commit f23750b5b3d98653b31d4469592935ef6364ad67 Author: Thelford Williams <[email protected]> Date: Wed Oct 13 16:04:13 2021 -0400

drm/amdgpu: fix out of bounds write

but amdgpu_dm_debugfs.c contains more of the same issue so fix the remaining ones.

v2: * Add missing fix in dp_max_bpc_write (Harry…

Record: OESA-2024-1693
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVRHSA-2023:6583 8.2

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Record: RHSA-2023:6583
CVSS 3.1: 8.2 HighCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-02

OSVRHSA-2024:5672 7.1

Red Hat Security Advisory: kernel security update

Record: RHSA-2024:5672
CVSS 3.1: 7.1 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Updated: 2026-11-02

OSVRHSA-2024:5673 7.1

Red Hat Security Advisory: kernel-rt security update

Record: RHSA-2024:5673
CVSS 3.1: 7.1 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-52735 5.6

Record: UBUNTU-CVE-2023-52735
CVSS 4.0: 5.6 MediumCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated: 2026-11-11

OSVCLSA-2024-1728936982 No score

kernel: Fix of 86 CVEs

drm/amd/pm: Fix negative array index read {CVE-2024-46821}
drm/amd/display: Check gpio_id before used as array index {CVE-2024-46818}
drm/amd/display: Check link_index before accessing dc->links[] {CVE-2024-46813}
drm/amd/display: Fix index may exceed array range within fpu_update_bw_bounding_box {CVE-2024-46811}
Squashfs: sanity check symbolic link size {CVE-2024-46744}
platform/x86: panasonic-laptop: Fix SINF array out of bounds accesses {CVE-2024-46859}
net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc() {CVE-2024-40995}
net/sched: act_api: rely on rcu in tcf_idr_check_alloc {CVE-2024-40995}
netfilter: bridge: confirm multicast packets before passing them up the stack {CVE-2024-27415}
netfilter: let reset rules clean out conntrack entries {CVE-2024-27415}
mm/filemap: make MAX_PAGECACHE_ORDER acceptable to xarray {CVE-2024-42243}
gpiolib: cdev: Fix use after free in lineinfo_changed_notify {CVE-2024-36899}
bpf, sockmap: Prevent lock inversion deadlock in map delete elem {CVE-2024-35895}
bpf, sockmap: Fix preempt_rt splat when using raw_spin_lock_t {CVE-2024-35895}
mm/huge_memory: don't unpoison huge_zero_folio {CVE-2024-40914}
cxgb4: fix use after free bugs caused by circular dependency problem {CVE-2023-4133}
timers: Restore ABI Compatibility with timer_delete Functions {CVE-2023-4133}
timers: Provide timer_shutdown_sync {CVE-2023-4133}
timers: Add shutdown mechanism to the internal functions {CVE-2023-4133}
timers: Split [try_to_]del_timer_sync to prepare for shutdown mode {CVE-2023-4133}
timers: Silently ignore timers with a NULL function {CVE-2023-4133}
timers: Rename del_timer() to timer_delete() {CVE-2023-4133}
timers: Rename del_timer_sync() to timer_delete_sync() {CVE-2023-4133}
timers: Use del_timer_sync() even on UP {CVE-2023-4133}
timers: Update kernel-doc for various functions {CVE-2023-4133}
timers: Replace BUG_ON()s {CVE-2023-4133}
timers: Get rid of del_singleshot_timer_sync() {CVE-2023-4133}
clocksource/drivers/sp804: Do not use timer namespace for timer_shutdown() function {CVE-2023-4133}
clocksource/drivers/arm_arch_timer: Do not use timer namespace for timer_shutdown() function {CVE-2023-4133}
mm: avoid overflows in dirty throttling logic {CVE-2024-42131}
ring-buffer: Fix a race between readers and resize checks {CVE-2024-38601}
igc: avoid returning frame twice in XDP_REDIRECT {CVE-2024-26853}
igc: Avoid transmit queue timeout for XDP {CVE-2024-26853}
nfsd: fix RELEASE_LOCKOWNER {CVE-2024-26629}
tty: n_gsm: require CAP_NET_ADMIN to attach N_GSM0710 ldisc {CVE-2023-52880}
nvmet: fix a possible leak when destroy a ctrl during qp establishment {CVE-2024-42152}
net: ntb_netdev: Move ntb_netdev_rx_handler() to call netif_rx() from __netif_rx() {CVE-2024-42110}
x86: stop playing stack games in profile_pc() {CVE-2024-42096}
xdp: Remove WARN() from __xdp_reg_mem_model() {CVE-2024-42082}
NFSv4: Fix memory leak in nfs4_set_security_label {CVE-2024-41076}
ppp: reject claimed-as-LCP but actually malformed packets {CVE-2024-41044}
udp: Set SOCK_RCU_FREE earlier in udp_lib_get_port(). {CVE-2024-41041}
sched/deadline: Fix task_struct reference leak {CVE-2024-41023}
tipc: force a dst refcount before doing decryption {CVE-2024-40983}
scsi: qedi: Fix crash while reading debugfs attribute {CVE-2024-40978}
wifi: iwlwifi: mvm: don't read past the mfuart notifcation {CVE-2024-40941}
wifi: iwlwifi: mvm: check n_ssids before accessing the ssids {CVE-2024-40929}
xhci: Handle TD clearing for multiple streams case {CVE-2024-40927}
wifi: mac80211: Fix deadlock in ieee80211_sta_ps_deliver_wakeup() {CVE-2024-40912}
wifi: cfg80211: Lock wiphy in cfg80211_get_station {CVE-2024-40911}
ipv6: fix possible race in __fib6_drop_pcpu_from() {CVE-2024-40905}
md/raid5: fix deadlock that raid5d() wait for itself to clear MD_SB_CHANGE_PENDING {CVE-2024-39476}
usb-storage: alauda: Check whether the media is…

Record: CLSA-2024-1728936982
Updated: 2026-11-02

OSVSUSE-SU-2024:2372-1 No score