SUSE alert openSUSE-SU-2026:21705-1 (go1.26-openssl)

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null@suse.de
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openSUSE-SU-2026:21705-1: important: Security update for go1.26-openssl
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Mon, 31 Aug 2026 17:57:33 +0200
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<20260831155734.04C7CFDCF@maintenance.suse.de>
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Article
openSUSE security update: security update for go1.26-openssl
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:21705-1
Rating: important
References:

  * bsc#1255111
  * bsc#1266609
  * bsc#1275024
  * bsc#1275025
  * bsc#1275026
  * bsc#1275028
  * bsc#1275029
  * bsc#1275032
  * bsc#1275033
  * bsc#1275034



Cross-References:

  * CVE-2026-33818
  * CVE-2026-39821
  * CVE-2026-56853
  * CVE-2026-56858
  * CVE-2026-56859
  * CVE-2026-56860
  * CVE-2026-56862
  * CVE-2026-56864
  * CVE-2026-56865



CVSS scores:

  * CVE-2026-33818 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-39821 ( SUSE ): 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-39821 ( SUSE ): 9.1 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-56853 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-56858 ( SUSE ): 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
  * CVE-2026-56859 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-56860 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-56862 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-56864 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
  * CVE-2026-56865 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves 9 vulnerabilities and has 10 bug fixes can now be installed.

Description:

This update for go1.26-openssl fixes the following issues:

Update to version 1.26.7 cut from the go1.25-fips-release branch at the revision tagged
go1.26.7-1-openssl-fips.

Security issues fixed:

- CVE-2026-33818: encoding/asn1: stack exhaustion when parsing deeply-nested, recursive structures
can lead to denial
  of service (bsc#1275034).
- CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only Punycode-encoded labels
allows for validation
  bypass and privilege escalation (bsc#1266609).
- CVE-2026-56853: net/http: first header read timeout not being applied when a server is configured
to support
  unencrypted HTTP/2 allows for denial of service (bsc#1275028).
- CVE-2026-56858: html/template: wrong JavaScript regexp context tracking after top-level `{` can
lead to XSS
  (bsc#1275033).
- CVE-2026-56859: encoding/xml: stack exhaustion due to recursion depth guard bypass during
decoding operations can
  lead to denial of service (bsc#1275026).
- CVE-2026-56860: net/url: quadratic complexity in `resolvePath` when processing backtrack path
elements can lead to
  denial of service (bsc#1275029).
- CVE-2026-56862: crypto/tls: handshake messages can bypass non-advancing record limit in TLS 1.3,
which can lead to
  a denial of service (bsc#1275032).
- CVE-2026-56864: x/mod/sumdb: a malicious `GOSUMDB` is capable of serving arbitrary module content
not contained
  within the transparency log (bsc#1275025).
- CVE-2026-56865: x/mod/sumdb/tlog: a malicious `GOPROXY` is capable of forging sumdb tiles, which
allows for bypass of
  the `GOSUMDB` check and persistence of attacker-controlled module contents to a local Go module
cache (bsc#1275024).

Other updates and bugfixes:

- Update to version 1.26.7 cut from the go1.25-fips-release branch at the revision tagged
go1.26.7-1-openssl-fips:
  (jsc#SLE-18320).
  * Rebase to 1.26.7
  * Support `strictfipsruntime` with `no_openssl`
  * Fix multiple `no_openssl` build tag issues
- go1.26.7 (released 2026-08-19, boo#1255111):
  * go#80927 net/http: `ReadHeaderTimeout` remains active after unencrypted `HTTP/2` handoff
- go1.26.6 (released 2026-08-13):
  * includes security fixes to the `go` command, and the `crypto/tls`, `encoding/asn1`,
`encoding/xml`,
    `html/template`, `net`, `net/http`, and `net/url` packages, as well as bug fixes to the
compiler, the linker, the
    runtime, and the `crypto/tls` and `os` packages.
  * go#79876 cmd/compile: `prove` misscompilation in `slicemask` folding leaves garbage in the
upper bits
  * go#80099 cmd/compile: internal compiler error invalid heap allocated var without `Heapaddr`
  * go#80131 cmd/link: `peCreateExportFile` generates invalid `.def` file when output name has
trailing dot (`c-shared`
    on Windows)
  * go#80365 os: `Root`'s `MkdirAll` can't create paths ending in forward slashes
  * go#80367 os: `TestRootMultiReadFile` fails on `netbsd/arm64` after CL 797880
  * go#80369 os: `TestRootConsistencyRemoveAll` fails on Plan 9 after CL 797880
  * go#80394 runtime: `arm64` found pointer to free object with safe code
  * go#80441 runtime: uninitialized register due to wrong ABI in `mach_vm_region_trampoline` leads
to `libc` following
    garbage stack data as a pointer
  * go#80478 cmd/compile: `riscv64` miscompiles struct copy, corrupting a `[]byte` slice field
  * go#80499 runtime: js/wasm: "found bad pointer in Go heap" -- link-layout-constant value
recorded as a pointer in
    the write-barrier buffer
  * go#80579 cmd/compile: `regalloc` uses unreliable type data (like `v.Type.IsSigned()`) to choose
the restore of
    spills
  * go#80606 crypto/tls: escape hatch for FIPS 140-3 mode Extended Master Secret enforcement
  * go#80609 net, x/net/dns/dnsmessage: panic when parsing invalid `SVCB` record
  * go#80615 cmd/compile: `mips64le` misscompile `OffPtr` by a const which doesn't fit 32bits
resulting in panic
  * go#80617 cmd/compile: `mips`/`mips64`, multiply/divide results spilled from `HI`/`LO` corrupted
w/ big stack frames
  * go#80619 cmd/compile: `prove` bug causes invalid indirect call
  * go#80715 runtime: `fpTracebackPartialExpand` `SIGSEGV` under high panic load
- Update to version 1.26.5 cut from the go1.25-fips-release branch at the revision tagged
go1.26.5-2-openssl-fips:
  * Limit `openssl` `RandReader` concurrency


Patch instructions:

   To install this openSUSE security update use the suse recommended installation methods
   like YaST online_update or "zypper patch".
   Alternatively you can run the command listed for your product:

- openSUSE Leap 16.0

   zypper in -t patch openSUSE-Leap-16.0-1561=1

Package List:

- openSUSE Leap 16.0:

  go1.26-openssl-1.26.7-160000.1.1
  go1.26-openssl-doc-1.26.7-160000.1.1
  go1.26-openssl-race-1.26.7-160000.1.1

References:

  * https://www.suse.com/security/cve/CVE-2026-33818.html
  * https://www.suse.com/security/cve/CVE-2026-39821.html
  * https://www.suse.com/security/cve/CVE-2026-56853.html
  * https://www.suse.com/security/cve/CVE-2026-56858.html
  * https://www.suse.com/security/cve/CVE-2026-56859.html
  * https://www.suse.com/security/cve/CVE-2026-56860.html
  * https://www.suse.com/security/cve/CVE-2026-56862.html
  * https://www.suse.com/security/cve/CVE-2026-56864.html
  * https://www.suse.com/security/cve/CVE-2026-56865.html