net/tls: fix slab-out-of-bounds bug in decrypt_internal (CVE-2022-49094) | HOL Guard CVE

Critical · CVSS 9.8CVE-2022-49094

net/tls: fix slab-out-of-bounds bug in decrypt_internal

Answer in brief

CVE-2022-49094 records a Critical severity (CVSS 9.8) vulnerability in net/tls: fix slab-out-of-bounds bug in decrypt_internal. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Feb 26, 2025Updated Aug 5, 2026Source checked Sep 19, 2026First seen by HOL Aug 4, 2026Material review Aug 5, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.8
Exploitation: Not marked as known exploited
Affected software: 4 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:o:linux:linux_kernel::::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:5.18:rc1::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	5.2	Not reported
Linux/Linuxgeneric	>=f295b3ae9f5927e084bd5decdff82390e3471801 <2b7d14c105dd8f6412eda5a91e1e6154653731e3 \|\| >=f295b3ae9f5927e084bd5decdff82390e3471801 <589154d0f18945f41d138a5b4e49e518d294474b \|\| >=f295b3ae9f5927e084bd5decdff82390e3471801 <6e2f1b033b17dedda51d465861b69e58317d6343 \|\| >=f295b3ae9f5927e084bd5decdff82390e3471801 <29be1816cbab9a0dc6243120939fd10a92753756 \|\| >=f295b3ae9f5927e084bd5decdff82390e3471801 <2304660ab6c425df64d95301b601424c6a50f28b \|\| >=f295b3ae9f5927e084bd5decdff82390e3471801 <9381fe8c849cfbe50245ac01fc077554f6eaa0e2	2b7d14c105dd8f6412eda5a91e1e6154653731e3, 589154d0f18945f41d138a5b4e49e518d294474b, 6e2f1b033b17dedda51d465861b69e58317d6343, 29be1816cbab9a0dc6243120939fd10a92753756, 2304660ab6c425df64d95301b601424c6a50f28b, 9381fe8c849cfbe50245ac01fc077554f6eaa0e2

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 2b7d14c105dd8f6412eda5a91e1e6154653731e3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Feb 26, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 4, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: net/tls: fix slab-out-of-bounds bug in decrypt_internal The memory size of tls_ctx->rx.iv for AES128-CCM is 12 setting in tls_set_sw_offload(). The return value of crypto_aead_ivsize() for "ccm(aes)" is 16. So memcpy() require 16 bytes from 12 bytes memory space will trigger slab-out-of-bounds bug as following: ================================================================== BUG: KASAN: slab-out-of-bounds in decrypt_internal+0x385/0xc40 [tls] Read of size 16 at addr ffff888114e84e60 by task tls/10911 Call Trace: <TASK> dump_stack_lvl+0x34/0x44 print_report.cold+0x5e/0x5db ? decrypt_internal+0x385/0xc40 [tls] kasan_report+0xab/0x120 ? decrypt_internal+0x385/0xc40 [tls] kasan_check_range+0xf9/0x1e0 memcpy+0x20/0x60 decrypt_internal+0x385/0xc40 [tls] ? tls_get_rec+0x2e0/0x2e0 [tls] ? process_rx_list+0x1a5/0x420 [tls] ? tls_setup_from_iter.constprop.0+0x2e0/0x2e0 [tls] decrypt_skb_update+0x9d/0x400 [tls] tls_sw_recvmsg+0x3c8/0xb50 [tls] Allocated by task 10911: kasan_save_stack+0x1e/0x40 __kasan_kmalloc+0x81/0xa0 tls_set_sw_offload+0x2eb/0xa20 [tls] tls_setsockopt+0x68c/0x700 [tls] __sys_setsockopt+0xfe/0x1b0 Replace the crypto_aead_ivsize() with prot->iv_size + prot->salt_size when memcpy() iv value in TLS_1_3_VERSION scenario.

Quoted source text, attributed separately from HOL analysis.